Researchers Database

TAKEUCHI Takae

FacultyFaculty Division of Natural Sciences Research Group of Chemistry
PositionAssociate Professor
Last Updated :2022/10/05

researchmap

Profile and Settings

  • Name (Japanese)

    Takeuchi
  • Name (Kana)

    Takae

Degree

  • Ph.D., Mar. 1985
  • M.Sci., Mar. 1982

Research Interests

  • Chemical Microbiology
  • Advanced Metrology for Cultural Properties
  • Theoretical Chemistry
  • Reaction Dynamics
  • Organosilicon Chemistry
  • Environmental Analytical Chemistry
  • Quantum Chemistry
  • Gas Phase Ion Chemistry
  • Chemical Mass Spectrometry

Research Areas

  • Life sciences, Molecular biology, Chemical Microbiology
  • Nanotechnology/Materials, Structural/physical organic chemistry, Gas phase ion chemistry
  • Nanotechnology/Materials, Analytical chemistry, Chemical Mass Spectrometry
  • Humanities & social sciences, Cultural properties, Advanced Metrology for Cultural Properties
  • Nanotechnology/Materials, Basic physical chemistry, Quantum chemistry

Research Experience

  • Apr. 2018, 9999, Japan Society for the Promotion of Science (JSPS), The 193rd Committee on Measurement and Characterization Platform,, Administration committee, Japan
  • Apr. 2018, 9999, Japan Society for the Promotion of Science (JSPS), R&D committee: New Value Creation of Autonomous- and Cooperative-Type Advanced Measurement using "AI", Research Group IV, Leader, Japan
  • Jan. 2016, 9999, International Union of Pure and Applied Chemistry (IUPAC),, Division V, Analytical Chemistry Division,, Titular Member (TM), In 2018-2019 Div. V Secretary, Switzerland
  • Apr. 2009, 9999, Nara Women's University,, KYOUSEI Scinece Center for Life and Nature,, Associate Professor, Dr. (Concurrently Associate Professor of Department of Chemistry, Faculty of Science), Japan
  • Oct. 2008, 9999, Science Council of Japan,, Chemistry Committee (Analytical Chemistry Division, IUPAC Division),, Associate Member, 2014- Secretary of Analytical Chemistry Division, 2014- Secretary of IUPAC Division, 21期(2008-2011), 22期(2011-2014), 23期(2014-2017),24期(2017-2020)
  • Apr. 2002, 9999, Nara Women's University, Department of Chemistry, Faculty of Science,, Associate Professor, Dr., Japan
  • Sep. 2004, Mar. 2020, Japan Society for the Promotion of Science (JSPS), The 141st Committee on Microbeam Analysis, 2019.09-2020.03 Committee Vice-Chairperson, Japan
  • Apr. 2017, Mar. 2018, New Energy and Industrial Technology Development Organization (NEDO),, Advanced Program for Enery and Environmental New Technologies, "Research and Development of the Innovative Inspection Evaluation New Technology Suitable for Big Data" (Project C), Member of the Investigation Committee, Japan
  • Nov. 2014, Oct. 2017, Japan Society for the Promotion of Science (JSPS), R&D committee: The construction of the measurement analysis platform strategy for the innovation creation, 学界委員, Japan
  • Apr. 2013, Mar. 2016, National Institute of Advanced Industrial Science and Technology (AIST),, Guest Researcher, Japan
  • Apr. 2005, Dec. 2015, Nara Prefecture,, Council for Natural Environments maintenance, Hot Spring Division, Specialized committee member, Japan
  • Feb. 2009, Jan. 2015, Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT), The Council for Science and Technology "Development of Advanced Measurement and Analysis System",, Committee Member, Japan
  • Apr. 2004, Mar. 2011, National Institute of Advanced Industrial Science and Technology (AIST),, Guest Researcher, Associate Professor, Dr., Japan
  • Apr. 2007, Mar. 2010, Japan Society for the Promotion of Science (JSPS), R&D Committee on Preservation Technology of Cultural Properties, 学界委員, Japan
  • Jul. 2006, Jun. 2009, Japan Society for the Promotion of Science (JSPS),, R&D Committee on Atom and Cluster Beams Technology, 研究開発委員, Japan
  • Apr. 2006, Mar. 2007, Kyushu University,, Part-time lecturer, Associate Professor, Dr., Japan
  • Apr. 2000, Mar. 2002, Nara Womens University, Department of Chemistry, Faculty of Science,, Lecturer, Dr., Japan
  • Sep. 1987, Mar. 2000, Nara Womens University,, Department of Chemistry, Faculty of Science,, Research Associate, Dr., Japan
  • Dec. 1995, Dec. 1995, University of Amsterdam,, Institute of Mass Spectrometry,, Guest Researcher, Dr., 文部省短期在外研究員, Netherlands
  • Oct. 1986, Sep. 1987, University of Liege, Department of Chemistry,, Post Doctoral, Dr., ベルギー政府給付奨学生, Belgium
  • Apr. 1985, Sep. 1986, Nara Women's University, Department of Chemistry, Faculty of Science,, Part-time Lecturer, Dr., Japan
  • Apr. 2018, 9999, Japan Society for the Promotion of Science (JSPS),, R026 Committee for Future Design of Advanced Measurement Techniques,, Secretary
  • Jan. 2021, 9999, The Mass Spectrometry Society of Japan,, Mass Spectral Database Division,, Division Chair

Education

  • Apr. 1982, Mar. 1985, Nara Women's University, Graduate School of Humanities and Sciences (Doctoral Course):, (Physical Chemistry, Chemical Mass Spectrometry, Quantum Chemistry), Japan
  • Apr. 1980, Mar. 1982, Nara Women's University,, Graduate School of Science (Master's Course), Department of Chemistry, Japan
  • Apr. 1976, Mar. 1980, Nara Women's University,, Faculty of Science,, Department of Chemistry, Japan

Association Memberships

  • The American Chemical Society, Jan. 2012, 9999
  • Science Council of Japan, Oct. 2008, 9999
  • The Society of Silicon Chemistry, Japan, Sep. 1997, 9999
  • Japan Society of Theoretical Chemistry, Jun. 1997, 9999
  • The Society of Polymer Science, Japan, 1995, 9999
  • The American Society for Mass Spectrometry, Jan. 1988, 9999
  • The Japan Society for Analytical Chemistry, Sep. 1987, 9999
  • The Kinki Chemical Society, Japan, Apr. 1982, 9999
  • Mass Spectrometry Society of Japan, Jan. 1982, 9999
  • The Chemical Society of Japan, Jan. 1980, 9999
  • 分子科学会
  • 国際質量分析学会
  • 公益財団法人 日本表面科学会
  • 日本プロテオーム学会
  • Japan Society for Molecular Science
  • Japan Proteomics Society (JHUPO)

Ⅱ.研究活動実績

Published Papers

  • Refereed, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, Production of low-energy SiCH3+ and SiC2H7+ ion beams for 3C-SiC film formation by selecting fragment ions from dimethylsilane, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Fragment ions produced from dimethylsilane (DMS) in a Bernas-type ion source were investigated. Dominant fragment ions were identified to be CH3+, Sit, SiH3+, SiCH3+ and SiC2H7+. We mass-selected SiCH3+ and SiC2H7+ ions and then produced low-energy SiCH3+ and SiC2H7+ ion beams. Subsequently, these ion beams were used to irradiate Si(1 1 1) substrates at 800 degrees C. The energies of SiCH3+ and SiC2H7+ ions were set at 100 eV. We found that the irradiation of these ions led to the deposition of silicon carbide (3C-SiC) films on the Si substrates. For comparison, SiC film formations on Si(1 1 1) substrates were also attempted by the chemical vapor deposition (CVD) method using DMS. The X-ray photoelectron spectroscopy measurements showed that atomic ratios of C to Si (C/Si ratio) of the films obtained by the irradiation of SiCH3+ and SiC2H7+ ion beams were 1.2 and 1.2, respectively. Conversely, the C/Si ratio of the film obtained by CVD was 1.9. Raman spectroscopy showed that the film obtained by CVD included diamond-like carbon. These results suggest that the low-energy mass-selected ion beam deposition technique using DMS-derived fragment ions is practicable for the 3C-SiC deposition on Si substrates., 14 Dec. 2020, 487, 85, 89, Scientific journal
  • Refereed, Pure and Applied Chemistry, Walter de Gruyter GmbH, Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020), Takae Takeuchi; A. James McQuillan; Alexander Shard; Andrea E. Russell; D. Brynn Hibbert, AbstractThis glossary provides a formal vocabulary of terms for concepts in surface analysis and gives clear definitions to those who utilize surface chemical analysis or need to interpret surface chemical analysis results but are not themselves surface chemists or surface spectroscopists., 02 Nov. 2020, 92, 11, 1781, 1860, Scientific journal
  • Refereed, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, Production of low-energy fragment-ion beams from hexamethyldisiloxane and the irradiation of SiO+ ion beam to substrates with supplemental oxygen gas for SiO2 film formation, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Masato Kiuchi, 17 Jun. 2020, 479, 13, 17, Scientific journal
  • Not Refereed, Journal of Research and Development of Education System, Study of High School Class Development with Demonstration Experiments by University Students - Chemical Studies ("Chemiluminescence" and "Colors of Metal Ions") through the Science Opening Laboratory as an Incentive, Takayuki Nakajima; Yuji Mikata; Takashi Kajiwara; Takae Takeuchi; Yasuyuki Ura; Hiroshi Takashima; Niriyuki Matsuura, Mar. 2020, 15, 99, 109, Research institution
  • Refereed, Journal of Vacuum Science & Technology A, A V S AMER INST PHYSICS, Stability of hexafluoroacetylacetone molecules on metallic and oxidized nickel surfaces in atomic-layer-etching processes, Abdulrahman H. Basher; Marjan Krstić; Takae Takeuchi; Michiro Isobe; Tomoko Ito; Masato Kiuchi; Kazuhiro Karahashi; Wolfgang Wenzel; Satoshi Hamaguchi, Adsorption of enol hexafluoroacetylacetone (hfacH) on nickel oxide (NiO) fcc (100) and metallic Ni fcc (100) surfaces and the stability of the adsorbate was examined using first-principles quantum mechanical simulations. It was shown that an hfacH molecule can be unstable and dissociate on an Ni metal surface. On an NiO surface; however, an hfacH molecule can be deprotonated and form a hexafluoroacetylacetonate anion (hfac(-)) bonded stably with positively charged Ni atoms of the surface. The results are consistent with observations of the interaction of hfacH with NiO and Ni surfaces in earlier experiments. The results also explain the mechanisms of the adsorption steps in the thermal atomic layer etching of Ni based on the cyclic processes of surface oxidation and formation of volatile organo-nickel complexes. (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)., 24 Feb. 2020, 38, 2, 022610-1, 022610-8, Scientific journal
  • Refereed, Journal of Organometallic Chemistry, CpCo(I)- and Cp*Ru(II)Cl-catalyzed [2+2+2] cycloadditions of siladiynes and alkynes: A combined experimental and theoretical study, Toru Amakasu; Keisuke Sato; Yusuke Ohta; Genki Kitazawa; Hidefumi Sato; Kouta Oumiya; Yoshiteru Kawakami; Takae Takeuchi; Yoshio Kabe, 02 Nov. 2019, 905, 1, 121006-1, 121006-12, Scientific journal
  • Not Refereed, Proceedings of the 12th International Symposium on Atomic Level Characterizations for New Materials and Devices, Quantum mechanical study on reaction mechanisms of gaseous pentane-2,4-dione and (Z)-4-hydroxypent-3-en-2-one on Ni surfaces and NiO surfaces, Takae Takeuchi; Kana Nakamura; Abdulrahman H Basher; Tomoko Ito; Kazuhiro Karahashi; Satoshi Hamaguchi, 20 Oct. 2019, 12, 652, 653, International conference proceedings
  • Refereed, Nuclear Inst. and Methods in Physics Research B, ELSEVIER, Characteristics of films deposited by the irradiation of GeCHx+ ions produced from hexamethyldigermane and their dependence on the injected ion energy, Yoshimura, Satoru; Sugimoto, Satoshi; Takeuchi, Takae; Murai, Kensuke; Kiuchi, Masato, The characteristics of films deposited by the irradiation of GeCHx+ ions and their dependence on the injected ion energy were investigated. GeCHx+ ion beams were produced by the decomposition of hexamethyldigermane in a Freeman-type ion source. GeCHx+ ions were then mass-selected and irradiated for film deposition on Si substrates at room temperature. The GeCHx+ ion energy was set at about 100, 30, 20, and 10 eV. The Fourier transform infrared spectroscopy (FTIR) analyses of the deposited films suggested that Ge-C bonds of GeCH(x)(+)ions were broken due to the collision between GeCHx+ ions and the substrate surface in the cases of 100 and 30 eV. In contrast, Ge-C bonds remained in the film at the ion energy of 20 or 10 eV. Subsequently, the GeCH(x)(+ )ion energy was set at 20 eV, whereas the Si substrate temperature was set at 300 degrees C. FTIR and X-ray diffraction analyses of the films obtained suggested that the Ge-C bonds were broken at 300 degrees C and the resulting Ge atoms recombined with each other to form a metallic Ge film., 17 Sep. 2019, 461, 1, 5, Scientific journal
  • Refereed, AIP Advances, AIP Publishing, Low-energy mass-selected ion beam deposition of silicon carbide with Bernas-type ion source using methylsilane, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Methylsilane-derived fragment ions obtained from a Bernas-type ion source were investigated using a low-energy mass-selected ion beam system. Based on mass-energy analyzer measurements, these ions were determined to be H+, H-2(+), H-3(+), CH3+, Si+, and SiCH5+. The SiCH5+ ions were selected and injected into a Si(111) substrate at 750 degrees C. The ion energy was 40 eV. This injection led to the formation of a silicon carbide film on the Si substrate. An analysis of this film indicates that this type of ion beam deposition method can efficiently form silicon carbide film., 26 Sep. 2019, 9, 9, 095051/1, 095051/4, Scientific journal
  • Refereed, Thin Solid Films, ELSEVIER SCIENCE SA, Effects of injected ion energy on silicon carbide film formation by low-energy SiCH3+ beam irradiation, S. Yoshimura; S. Sugimoto; T. Takeuchi; K Murai; M. Kiuchi, The effect of the energy level of injected ions on the formation of silicon carbide (SiC) films was investigated. These trials were based on the injection of a SiCH3+ ion beam into Si(100) substrates at 800 degrees C, using ion energies of 20, 100 or 200 eV. The specimens obtained following irradiation with these three energy levels were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy to confirm the deposition of 3C-SiC films. The data show similar carbon to silicon atomic ratios in all three films. However, analysis by atomic force microscopy demonstrated that the substrate surface obtained after 100 eV SiCH3+ ion irradiation was much smoother than those obtained after 20 or 200 eV irradiation., 02 Jul. 2019, 685, 408, 413, Scientific journal
  • Not Refereed, Journal of Research and Development of Education System, Study of High School Class Development with Demonstration Experiments by University Students - Chemical Studies ("History and Mechanisms of Batteries" and "Chemiluminescence") through the Science Opening Laboratory as an Incentive, TAKASHIMA Hiroshi; TAKEUCHI Takae; MIKATA Yuji; URA Yasuyuki; NAKAJIMA Takayuki; MATSUURA Noriyuki, Mar. 2019, 14, 103, 111
  • Refereed, AIP Advances, {AIP} Publishing, Identification of fragment ions produced from hexamethyldigermane and the production of low-energy beam of fragment ion possessing Ge-C bond, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Masato Kiuchi, Fragment ions produced from hexamethyldigermane (HMDG) were identified using an ion beam system. The possible chemical formulae for these ions are CH3+, C2H4+, Ge+, GeCHx+, and GeC3Hx+. Among the fragment ions, GeCHx+ ions were mass-selected and irradiated to a Si substrate at room temperature. The ion energy was set at approximately 10 eV. The analyses of the film deposited on the substrate suggested that GeCHx+ ion beam produced from HMDG was useful for germanium-carbon film formation. (C) 2019 Author(s)., Feb. 2019, 9, 2, 025008, 025008, Scientific journal
  • Refereed, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, Identification of fragment ions produced from hexamethyldisilazane and production of low-energy mass-selected fragment ion beam, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Sep. 2018, 430, 1, 5, Scientific journal
  • Refereed, Thin Solid Films, Elsevier B.V., Low-energy mass-selected ion beam production of fragments from tetraethylorthosilicate for the formation of silicon dioxide film, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Fragment ions produced from tetraethylorthosilicate (TEOS) in a Freeman-type ion source were investigated using a low-energy mass-selected ion beam system and then, their mass numbers were identified. Although the chemical formulae of these fragments were not completely identified yet, the possible candidates of dominant fragment ions were C2+, C+, CH2 +, O+, H2O+, Si+, SiC+, SiO+, SiH(OH)2 +, Si(OH)3 +, SiH(OH)(OC2H5)+, SiH(OCH3)2 +, Si(OH)2(OC2H5)+, SiH(OC2H5)2 +, Si(OH)(OC2H5)2 +, Si(OCH3)2(OC2H5)+, Si(OCH3)(OC2H5)2 +, and Si(OC2H5)3 +. Among these fragment ions, Si(OH)3 + ions were mass-selected. The ion energy was approximately 50 eV. Then, the Si(OH)3 + ions were irradiated to a Si substrate and resulting deposited films were analyzed. Following the completion of the ion irradiation experiment, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy assays of the films demonstrated the occurrence of silicon dioxide deposition. We conclude that the irradiation of the mass-selected Si(OH)3 + ions, obtained from TEOS, to substrates is useful for the secure growth of silicon dioxide films., 01 Jun. 2018, 655, 22, 26, Scientific journal
  • Refereed, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Elsevier B.V., Injected ion energy dependence of SiC film deposited by low-energy SiC3H9 + ion beam produced from hexamethyldisilane, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, We mass-selected SiC3H9 + ions from various fragments produced through the decomposition of hexamethyldisilane, and finally produced low-energy SiC3H9 + ion beams. The ion beams were injected into Si(1 0 0) substrates and the dependence of deposited films on injected ion energy was then investigated. Injected ion energies were 20, 100, or 200 eV. Films obtained were investigated with X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. X-ray diffraction and X-ray photoelectron spectroscopy of the substrates obtained following the injection of 20 eV ions demonstrated the occurrence of silicon carbide film (3C-SiC) deposition. On the other hand, Raman spectroscopy showed that the films deposited by the injection of 100 or 200 eV ions included 3C-SiC plus diamond-like carbon. Ion beam deposition using hexamethyldisilane-derived 20 eV SiC3H9 + ions is an efficient technique for 3C-SiC film formation on Si substrates., 01 Apr. 2018, 420, 6, 11, Scientific journal
  • Not Refereed, Education System Research, Study of High School Class Development with Demonstration Experiments by University Students - Chemical Studies (Organic Syntheses, Oxidation-Reduction, and Surfactants) through the Science Opening Laboratory as an Incentive, MIKATA Yuji; TAKEUCHI Takae; TAKASHIMA Hiroshi; MATSUURA Noriyuki; HASE, Mar. 2018, 13, 429, 436
  • Refereed, Abstract of annual meeting of the Surface Science of Japan, The Japan Society of Vacuum and Surface Science, Ab initio DFT Study on Surface Reaction Mechanisms of Acetyl Acetone on Ni and NiO Surfaces, Nakamura Kana; Basher Abdulrahman H.; Ito Tomoko; Karahashi Kazuhiro; Hamaguchi Satoshi; Takeuchi Takae, In order to elucidate chemical reaction mechanisms on Ni and NiO surfaces, we calculated ab initio DFT potential energy surfaces of reactions between acetyl acetone and the Ni or NiO surfaces. The results of the ab initio DFT calculation suggested that oxygen atom(s) of deprotonated acetyl acetone strongly interact(s) with a positively charged Ni atom on the NiO surface and thus form a precursor of a highly volatile metal complex., 2018, 2018, 0, 122, 122
  • Not Refereed, Proceedings of the 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '17 (ALC'17), Ambient Mass Spectrometry for Monitoring Microbial Volatile Metabolites from Soil-derived Fungi Using a DART Ion Source, Takae Takeuchi; Yuri Tanaka; Tohru Yamagaki; Motoshi Sakakura, 2018, 11, 199, 200
  • Refereed, J. Mass Spectrom. Soc. Jpn., Proposal: Recommendation on Measuring and Providing Mass Spectra as Chemical Information of Organic Molecules, MassBank Database; Committee; The Mass Spectrometry; Society of Japan; Ryuichi Arakawa; Hiroshi Adachi; Yasuo Shida; Katsuaki Shiratsuchi; Takae Takeuchi; Takaaki Nishioka; Yoshinao Wada, 2018, 66, 1, 30, 35, Scientific journal
  • Refereed, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, CHEMICAL SOC JAPAN, Unprecedented Property of 4,6-Di(substituted)amino-1,2-dihydro-1,3,5-triazines: Formation of Acid Salts by Simple Treatment with Alkali Metal Salts of Protic Acids, Shirou Maeda; Akihisa Maeda; Rika Hirose; Sayaka Tsuri; Takae Takeuchi; Kanji Meguro, Treatment of 4,6-di(substituted)amino-1,2-dihydro-1,3,5-triazine derivative (5) with sodium chloride in a bilayer system consisting of toluene and water gave its hydrochloride (6) in the toluene layer and sodium hydroxide in the aqueous layer. Similarly, treatment of 5, 8 and 9 with an aqueous sodium acetate solution in organic solvents resulted in the formation of their corresponding acetates, 7, 12 and 13, respectively., Feb. 2017, 90, 2, 178, 187, Scientific journal
  • Refereed, Rapid Communications in Mass Spectrometry, John Wiley and Sons Ltd, Mechanism for odd-electron anion generation of dihydroxybenzoic acid isomers in matrix-assisted laser desorption/ionization mass spectrometry with density functional theory calculations, Tohru Yamagaki; Michika Takeuchi; Takehiro Watanabe; Kohtaro Sugahara; Takae Takeuchi, Rationale: Proton and radical are transferred between matrices and matrix and analyte in matrix-assisted laser desorption/ionization (MALDI) and these transfers drive ionization of analytes. The odd-electron anion [M–2H]•– was generated in dihydroxybenzoic acids (DHBs) and the ion abundance of the 2,5-DHB was the highest among six DHB isomers. We were interested in the mechanism of the ion generation of the odd-electron anion. Methods: The observed [M–2H]•– and [M–3H]− ions, which were generated with the hydrogen radical removed from the phenolic hydroxyl groups (OH) in DHB isomers, were analyzed using negative-ion MALDI-MS. The enthalpy for ion generation and their stable structures were calculated using the density functional theory (DFT) calculation program Gaussian 09 with the B3LYP functional and the 6–31+G(d) basis set. Results: The number of observed [M–2H]•– and [M–3H]− ions of the DHB isomers was dependent on the positions of the phenolic OH groups in the DHB isomers because the carboxy group interacts with the ortho OH group due to neighboring group participation, as confirmed from the stable structures of the [M–2H]•– anions calculated with the Gaussian 09 program. The DHB isomers were placed into three categories according to the number of the ions. Conclusions: Odd-electron anions ([M–2H]•–) and [M–2H•–H]− ([M–3H]−) ions were generated from DHB isomers due to removal of the hydrogen radical from the phenolic groups. The enthalpy for ion generation revealed that ion formation proceeds via a two-step pathway through the [M–M]− ion as an intermediate. © 2016 The Authors. Rapid Communications in Mass Spectrometry Published by John Wiley & Sons Ltd., 30 Dec. 2016, 30, 24, 2650, 2654, Scientific journal
  • Refereed, JOURNAL OF PHYSICAL CHEMISTRY B, AMER CHEMICAL SOC, N-C-alpha Bond Cleavage of Zinc-Polyhistidine Complexes in Electron Transfer Dissociation Mediated by Zwitterion Formation: Experimental Evidence and Theoretical Analysis of the Utah-Washington Model, Daiki Asakawa; Asuka Yamashita; Shikiho Kawai; Takae Takeuchi; Yoshinao Wada, Electron capture dissociation (ECD) and electron transfer dissociation (ETD) of gas phase ions are widely used for peptide/protein sequencing by mass spectrometry. To understand the general mechanism of ECD/ETD of peptides, we focused on the ETD fragmentation of metal-peptide complexes in the absence of remote protons. Since Zn2+ strongly binds to neutral histidine residues in peptides, Zn2+-polyhistidine complexation does not generate any remote protons. However, in the absence of remote protons, electron transfer to the Zn2+-polyhistidine complex induced the N-C-alpha bond cleavage. The formation pathway for the ETD products was investigated by density functional theory calculations. The calculations showed that the charge-reduced zinc-peptide radical, [M + Zn](center dot+), can exist in the low-energy zwitterionic amide pi* states, which underwent homolytic N-C-alpha bond dissociation. The homolytic cleavage resulted in the donation of an electron from the N-C-alpha bond to the nitrogen atom, producing an iminoenol c' anion. The counterpart z(center dot) radical contained a radical site on the alpha-carbon atom. The iminoenol c' anion then abstracted a proton to presumably form the more stable amide c' fragment. The current experimental and computational joint study strongly suggested that the N-C-alpha bond cleavage occurred through the aminoketyl radical Zn2+-anion formation for Zn2+ polyhistidine complexes in ETD., Feb. 2016, 120, 5, 891, 901, Scientific journal
  • Refereed, JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, SPRINGER, Influence of Metal-Peptide Complexation on Fragmentation and Inter-Fragment Hydrogen Migration in Electron Transfer Dissociation, Daiki Asakawa; Takae Takeuchi; Asuka Yamashita; Yoshinao Wada, The use of metal salts in electrospray ionization (ESI) of peptides increases the charge state of peptide ions, facilitating electron transfer dissociation (ETD) in tandem mass spectrometry. In the present study, K+ and Ca2+ were used as charge carriers to form multiply-charged metal-peptide complexes. ETD of the potassium- or calcium-peptide complex was initiated by transfer of an electron to a proton remote from the metal cation, and a c'-zaEuro cent fragment complex, in which the c' and zaEuro cent fragments were linked together via a metal cation coordinating with several amino acid residues, was formed. The presence of a metal cation in the precursor for ETD increased the lifetime of the c'-zaEuro cent fragment complex, eventually generating caEuro cent and z' fragments through inter-fragment hydrogen migration. The degree of hydrogen migration was dependent on the location of the metal cation in the metal-peptide complex, but was not reconciled with conformation of the precursor ion obtained by molecular mechanics simulation. In contrast, the location of the metal cation in the intermediate suggested by the ETD spectrum was in agreement with the conformation of "proton-removed" precursors, indicating that the charge reduction of precursor ions by ETD induces conformational rearrangement during the fragmentation process., Jun. 2014, 25, 6, 1029, 1039, Scientific journal
  • Refereed, Plasma Medicine, Begell House Inc., Air modification apparatus by using a UV lamp and corona discharge, Masato Kiuchi; Hiroaki Sakurai; Susumu Kitagawa; Takae Takeuchi, An air modification apparatus was developed by using a UV lamp and two sets of corona discharge electrode pairs (UV2C). This apparatus works with no fan, and decomposes volatile organic compounds in air where the concentration of exhausted ozone is very low. The apparatus generates nitrogen oxide and collects dust in the air. The modification of air increases the quality of human daily life. The decontamination to the air was performed by using a simple atmospheric discharge system., 2014, 4, 1-4, 131, 135, Scientific journal
  • Refereed, Journal of Antibacterial and Antifungal AgentsJ. Antibact. Antifung. Agents, Current and future measures for Microbial Biodeterioration of Cultural Property 11. Development of the detection techniques for microbial volatile organic compounds, Takahito Suzuki; Masato Kiuchi; Takae Takeuchi, 2013, 41, 2, 93, 97
  • Refereed, INORGANICA CHIMICA ACTA, ELSEVIER SCIENCE SA, Structural, photophysical, and mesomorphic properties of luminescent platinum(II)-salen Schiff base complexes, Yuriko Abe; Yuko Takagi; Miyuki Nakamura; Takae Takeuchi; Tomoaki Tanase; Miho Yokokawa; Hidetomo Mukai; Takashi Megumi; Ayaha Hachisuga; Kazuchika Ohta, A series of square planar platinum(II) salen complexes containing 4-substituted alkoxy chains of aromatic rings, [Pt((4-CnH2n+1O)(2)salen)] (n = 3 (1), 4 (2), 6 (3), 8 (4), 10 (5), 12 (6), 14 (7), 16 (8), and 18 (9)) has been prepared, and photophysical and mesomorphic properties have been investigated. Complexes 1-9 emitted intense phosphorescence from the mixed exited-state between the MLCT (MLCT = metal-to-ligand charge transfer) and LLCT (LLCT = ligand-to-ligand charge transfer) states both in dichloromethane solution and in solid states at room temperature. The red-shifted solid-state emission spectra from monomers in solution are caused by the supramolecular contact with one-dimensional stacking between neighboring chromophores (salen moieties) through the weak C-H center dot center dot center dot O type hydrogen bonding and van der Waals interactions in the solid state revealed by an X-ray crystallographic analysis for 2. Though 1-4 did not exhibit any mesophases (liquid-crystalline phases), 5-9 showed a lamello-columnar (Col(L)) mesophase with the high thermal stability, leading to the different phosphorescence spectra from both in solution and in solid states. This is affiliated with the appearance of the intermolecular d(z2)PtdII - d(z2)Pt(II) orbital interaction in a one-dimensional stacking distance with ca. 3.0 angstrom due to self-assemblies in the liquid crystal which gives rise to the MMLCT (MMLCT = metal-metal-to-ligand charge transfer) transition. This is supported by absorption and emission measurements in the wide range from room temperature in the solid state to the clearing points (around 280 degrees C). The relationship between molecular assemblies and photophysical properties is discussed. (C) 2012 Elsevier B. V. All rights reserved., Sep. 2012, 392, 254, 260, Scientific journal
  • Refereed, SURFACE AND INTERFACE ANALYSIS, WILEY-BLACKWELL, Analysis of volatile metabolites emitted by soil-derived fungi using head space solid-phase microextraction/gas chromatography/mass spectrometry: I. Aspergillus fumigatus, Aspergillus nidulans, Fusarium solani and Penicillium paneum, Takae Takeuchi; Tomoko Kimura; Haruna Tanaka; Sachiyo Kaneko; Shoko Ichii; Masato Kiuchi; Takahito Suzuki, The microbial volatile organic compounds (MVOCs) emitted from soil-derived fungal strains were investigated using solid-phase microextraction/gas chromatography/mass spectrometry. Aspergillus fumigatus (KT176 and IFM40822), Aspergillus nidulans (FGSC4), Fusarium solani (NBRC31093) and Penicillium paneum (KT138) were cultured on the Czapek-Dox agar in various growth stages. Extracted ion chromatograms and mass spectra of MVOCs from the above fungi show that 2-ethyl-1-hexanol and 2-undecanone observed in the specimens began to increase at an early stage of incubation. Therefore, 2-ethyl-1-hexanol and 2-undecanone are candidates for indicating fungal growth if these compounds are not already present in the existing environment. Alcohols, aldehydes and ketones were found as MVOCs in most A. fumigatus, A. nidulans, F. solani and P. paneum. On the other hand, sesquiterpenes were found in only specific fungi. Because each fungal strain had a characteristic compound (sesquiterpene), these compounds are useful in identifying their fungi.As the number of spores increased with the fungal cultivation period, it was found that the amount of these MVOCs, ketones, aldehydes and alcohols also increased. Therefore, 3-octanone is suited to be an indicator of the size of fungi (fungal amounts) because of the positive correlation found between the number of spores and the amount of the compound. On the other hand, sesquiterpenes showed a peak of MVOCs at a particular period right before spore reproduction and therefore are useful to identify both fungal species and their reproduction periods. Copyright (c) 2012 John Wiley & Sons, Ltd., Jun. 2012, 44, 6, 694, 698, Scientific journal
  • Refereed, J. Jpn. Assoc. Oder Environ., Japan Association on Odor Environment, Fungal Oder Analysis for Conservation of Cultural Properties, Takae Takeuchi; Masato Kiuchi; Takahito Suzuki, Fungal odor analysis in early stages is important for the conservation of cultural properties. We developed a technique for detecting fungal species and the stage of growth by [Takeuchi et al, Surf. Interface Anal., 44(6), 694-698,(2012)] . Microbial volatile organic compounds are extracted by solid space microextaction, followed by GC/MS analysis. While the fungi were growing, the amount of alcohols, ketones and aldehydes as MVOCs emitted increased. The detection of sesquiterpenes was useful for determining fungal species., 2012, 43, 3, 211, 216, Scientific journal
  • Refereed, DALTON TRANSACTIONS, ROYAL SOC CHEMISTRY, Effects of the silicon core structures on the hole mobility of star-shaped oligothiophenes, Joji Ohshita; Yosuke Hatanaka; Shigenori Matsui; Tomonobu Mizumo; Yoshihito Kunugi; Yoshihito Honsho; Akinori Saeki; Shu Seki; Julius Tibbelin; Henrik Ottosson; Takae Takeuchi, Star-shaped compounds with three or four oligothiophene units linked by an organosilicon core were prepared and their hole-transport capabilities were studied. A top-contact type thin film transistor (TFT) with a vapour-deposited film of tris[(ethylterthiophenyl)dimethylsilyl]methylsilane (3T(3)Si(4)) showed field-effect mobility (mu(FET)) of 4.4 x 10-5 cm(2) V(-1) s(-1), while the device with the carbon centred analogue tris[(ethylterthiophenyl) dimethylsilyl] methane (3T(3)Si(3)C) showed no TFT activity. Intrinsic intramolecular hole mobility of 3T(3)Si(4) and 3T(3)Si(3)C was determined by time-resolved microwave conductivity measurements to be 8 x 10(-2) and 2 x 10(-2) cm(2) V(-1) s(-1), respectively, arising from higher degree of s-p interaction in 3T(3)Si(4). To know more about the effects of the organosilicon core structures on the intermolecular hole mobility, we calculated internal reorganization energies for hole transfer at the (U) B3LYP/6-311+ G(d, p)//(U) B3LYP/6-31G(d) level, which suggested smoother intermolecular charge transfer in the silicon derivative than the carbon and germanium analogues. Star-shaped compounds with quarterthiophene units behave in a different manner from the terthiophene derivatives and tris[(ethylquarterthiophenyl) dimethylsilyl] methane (4T(3)Si(3)C) showed higher TFT mobility of mu(FET) = 1.2 10-3 cm(2) V(-1) s(-1) than its silicon analogue (4T(3)Si(4): mu(FET) = 5.4 10(-4) cm(2) V(-1) s(-1)). This is probably due to the more condensed packing of 4T3Si3C in the film, arising from the shorter Si-C bonding. Compounds with four terthiophene units were also prepared and tetrakis[(ethylterthiophenyl)dimethylsilyl] silane (3T(4)Si(5)) showed the mobility of mu(FET) = 2.0 x 10-4 cm(2) V(-1) s(-1), higher than that of 3T(3)Si(4), indicating the potential of tetrakis(oligothiophenyl) compounds as the TFT materials. Tetrakis[(ethylterthiophenyl) dimethylsilyl] germane (3T(4)Si(4)Ge) was less thermally stable and could not be processed to a film by vapour-deposition, but was found to be TFT active in the spin-coated film, although the mobility was rather low (mu(FET) = 7.7 x 10(-7) cm(2) V(-1) s(-1))., 2010, 39, 39, 9314, 9320, Scientific journal
  • Refereed, ANALYTICAL CHEMISTRY, AMER CHEMICAL SOC, Distinct Features of Matrix-Assisted 6 mu m Infrared Laser Desorption/Ionization Mass Spectrometry in Biomolecular Analysis, Michiko Tajiri; Takae Takeuchi; Yoshinao Wada, Midinfrared-matrix-assisted laser desorption/ionization mass spectrometry (mid-IR-MALDI MS) with a laser emission in the 6 mu m wavelength range, which utilizes energy absorption at the C=O double-bond stretch region, was applied to biomolecular analysis. The softness of IR-MALDI MS was evident in the negative ion mode yielding clean mass spectra of [M - H](-) ions for acidic biomolecules with sulfate, phosphate, or carboxylate groups, resulting in better sensitivity than ultraviolet (UV)-MALDI MS. There was no substantial loss of sialic acid due to the prompt fragmentation occurring in IR-MALDI of sialylated glycoconjugates, such as gangliosides. Furthermore, the advantage of the low photon energy of IR is that, for the first time, intact protonated molecules of S-nitrosylated peptides can be detected by MALDI MS. In the analysis of redox-sensitive molecules including methylene blue and riboflavin, reductive hydrogenation was minimal, suggesting few hydrogen radicals to have formed in the plume, in contrast to UV-MALDI. In conjunction with a potent new matrix, oxamide, requiring smaller laser fluence, distinct features of the 6 mu m IR wavelength range are anticipated to remove one of the limitations of MALDI MS for bioniolecular analysis., Aug. 2009, 81, 16, 6750, 6755, Scientific journal
  • Refereed, CARBOHYDRATE RESEARCH, ELSEVIER SCI LTD, Preparation and conformational analysis of C-glycosyl beta(2)- and beta/beta(2)-peptides, Yoko Inaba; Toru Kawakami; Saburo Aimoto; Takahisa Ikegami; Takae Takeuchi; Takashi Nakazawa; Shigenobu Yano; Yuji Mikata, Ten C-glycosyl beta(2)- and beta/beta(2)-peptides with three to eight amino acid residues have been prepared. Solution and solid-phase peptide syntheses were employed to assemble beta(2)-amino acids in which C-glycosylic substituents are attached to the C-2 position of beta-amino acids. Conformational analysis of the C-glycosyl beta(2)-peptides using NMR and CD spectra indicates that the tripeptide can form a helical secondary structure. Besides, helix directions of the C-glycosyl beta/beta(2)-peptides are governed by the configuration at the carbon of the peptide backbone that originates from the stereocenter of the C-glycosyl beta(2)-amino acids. (C) 2009 Elsevier Ltd. All rights reserved., Mar. 2009, 344, 5, 613, 626, Scientific journal
  • Refereed, JOURNAL OF ORGANOMETALLIC CHEMISTRY, ELSEVIER SCIENCE SA, Nanosized starlike molecules. Synthesis and optical properties of tris- and tetrakis[oligo(disilanylenebithienylene)dimethylsilyl]benzene, Akinobu Naka; Yoshiaki Matsumoto; Tatsuya Itano; Kei Hasegawa; Tomoaki Shimamura; Joji Ohshita; Atsutaka Kunai; Takae Takeuchi; Mitsuo Ishikawa, The syntheses of two types of starlike molecules with the arms that extend to three and four directions have been reported. The molecules with the arms consisting of a regular alternating arrangement of a silicon-silicon bond and bithienylene unit that extend to three directions were synthesized by the reactions of 1,3,5-tris(chlorodimethylsilyl) benzene, which was chosen as a core, with the lithio[oligo(disilanylenebithienylene)] derivatives. The starlike molecules with extended arms to four directions were prepared by the reaction of 1,2,4,5-tetrakis(fluorodimethylsilyl) benzene used as a core, with lithio[oligo(disilanylenebithienylene)]s. UV-Vis absorption and fluorescence properties of these starlike molecules have been investigated in a dioxane solution. The present molecules showed absorption maxima in a range of 321-337 nm, and revealed higher fluorescence quantum yields than that of the corresponding linear polymer, poly[(tetraethyldisilanylene) bithiophene]. (C) 2008 Elsevier B.V. All rights reserved., Feb. 2009, 694, 3, 346, 352, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, Preparation of Ge-C films by low-energy ion beam induced chemical vapor deposition with hexamethyldigermane, Takaomi Matsutani; Masato Kiuchi; Takae Takeuchi, High carbon content Ge-C films were formed on (100) silicon by low-energy ion beam induced chemical vapor deposition (IBICVD) using Ar+ ion energies of 20-300 eV and gaseous hexamethyldigermane [HMDG: (CH3)(3)GeGe(CH3)(3)]. Chemical structures were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and IR-absorption peaks were assigned by ab initio molecular orbital calculations. While films with Ge-CH3 bonds were successfully deposited at ion beam energies of less than 200 eV, no film formation was observed at 200 eV or higher. The Ge:C atomic ratio was 0.25 as measured by XPS. In the case of a film deposited at a substrate temperature of 573 K, change in chemical structure with enhancement of hydrogen elimination was confirmed by FT-IR. Although most Ge atoms in the films bonded with C atoms, results suggest some carbon in the film constituted C-C bonds as in a graphitic phase. (c) 2007 Elsevier B.V. All rights reserved., Apr. 2007, 257, 261, 264, Scientific journal
  • Refereed, Shinku, The Vacuum Society of Japan, Tin Oxide Thin Films Prepared by Ion Beam Induced Chemical Vapor Deposition, FUJIKAWA Yuka; KIUCHI Masato; MATSUTANI Takaomi; TAKEUCHI Takae,   We deposited transparent and electrical conductive thin films on polymer substrates ZEONOR® (cycloolefin) by oxygen ion beam induced chemical vapor deposition (IBICVD) with tetramethylstannane (TMS). The film depositions were carried out the acceleration voltage of oxygen ion beam in range from 50 to 300 eV. The deposition time was fixed at 180 minutes at all conditions. Under irradiation of 300 eV oxygen ions, the optical transmittance at 550 nm and the resistivity of the prepared film were 80% and 5.4×10-2 Ω•cm, respectively. When oxygen ion energy increased from 50 to 300 eV, root mean square of roughness and contamination of carbon were decreased.
    , 20 Dec. 2006, 49, 12, 780, 781, Scientific journal
  • Refereed, SURFACE AND INTERFACE ANALYSIS, JOHN WILEY & SONS LTD, Mass spectrometric and theoretical studies on the fragmentation mechanism of protonated molecules and molecular radical cations of organometallic compounds with Si-C, Si-Si, Ge-C and Ge-Ge bonds, Takae Takeuchi; Yuko Shirai; Yuriko Matsumura; Kaoru Iwai; Takaomi Matsutani; Joji Oshita; Akinobu Naka, Protonated hexamethyldigermane [HMDG]H+ and protonated hexamethyldisilane [HMDS]H+ were generated in the gas phase by nanoelectrospray ionization (nano-ESI) and atmospheric pressure chemical ionization (APCI). The fragmentation mechanisms of [HMDG]H+ and [HMDS]H+ were investigated by analyzing the collision-induced dissociation (CID). In CID spectra of [HMDG]H+, the fragment ions due to a CH4 elimination from the protonated hexamethyldigermane were observed. The potential energy curves were calculated using the ab initio method (B3LYP/6-31G(2df,p)). The calculated optimal geometries of [HMDG]H+ and [HMDS]H+ were the proton-bound structures and the ion-neutral complexes. The results of ab initio calculations showed that C2H4 elimination occurred more easily than C2H6 elimination in both (CH3)(3)Ge+ and (CH3)(3)Si+. This was consistent with the experimental results of the CID spectrum of (CH3)(3)Si+. Copyright (C) 2006 John Wiley & Sons, Ltd., Dec. 2006, 38, 12-13, 1650, 1653, Scientific journal
  • Refereed, JOURNAL OF CHEMICAL PHYSICS, AMER INST PHYSICS, Experimental and theoretical study on gas-phase ion/molecule reactions of silver trimer cation, Ag-3(+), with 12-crown-4, K Kumondai; M Toyoda; M Ishihara; Katakuse, I; T Takeuchi; M Ikeda; K Iwamoto, The reaction mechanisms of silver trimer cation, Ag-3(+), with 12-crown-4 (12C4) were studied experimentally and theoretically. Using a cylindrical ion trap time-of-flight mass spectrometer, gas-phase ion/molecule reactions of Ag-3(+) with 12C4 were observed. Metal-ligand complexes of [Ag(12C4)](+), [Ag-3(12C4)](+) and [Ag-3(12C4)(2)](+), and of [Ag(12C4)(2)](+) and [Ag-3(12C4)(3)](+), were observed as the reaction intermediates and terminal products, respectively. The formations of the [Ag(12C4)](+) and [Ag(12C4)(2)](+) complexes indicated that the neutral dimer (Ag-2) had been eliminated from the trimer cation. From the results of ab initio calculations at the HF/LanL2DZ level of theory and the experiments, it is suggested that three 12C4 molecules can attach to Ag-3(+) through consecutive reactions and that neutral Ag-2 can be easily eliminated from [Ag-3(12C4)](+). (c) 2005 American Institute of Physics., Jul. 2005, 123, 2, 024314/1-024314/8, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, Mass spectrometric and theoretical studies on the fragmentation mechanisms of hexamethyldigermane and hexamethyldisilane ions in the gas phase, T Takeuchi; Y Shirai; T Matsutani; M Kiuchi, Fragmentation mechanisms of hexamethyldigermane and hexamethyldisilane ions have been investigated using the collision-induced dissociation-mass spectrometry/mass spectrometry (CID-MSMS) and ab initio MO calculations. The results of CID-MS/MS spectra showed that the [(CH3)(3)GeGe(CH3)(3)](+center dot) ion was fragmented to be (CH3)(3)Ge+, followed by the secondary fragmentation generating CH3Ge+. The results of ab initio calculations showed that a C2H4 elimination occurred more easily than a C2H6 elimination from (CH3)(3)Ge+ in the low energy region. (c) 2005 Elsevier B.V. All rights reserved., May 2005, 232, 217, 222, Scientific journal
  • Refereed, J. Mass Spectrom. Soc. Jpn., The Mass Spectrometry Society of Japan, Methyl Migration in the Metastably Decomposing Acetylphenyl Ions, CH3COC6H4+(m/z 119), Followed by the Loss of CO, S. Tajima; K. Minegishi; S. Nakajima; T. Takeuchi, The metastable ion dissociations of o-, m-, and p-acetylphenyl ions, CH3COC6H4+ (m/z 119), generated upon electron ionization from o-, m-, and p-diacetylbenzenes (CH3COC6H4COCH3, Mw : 162, 1-3), have been investigated by use of mass-analyzed ion kinetic energy (MIKE) spectrometry in conjunction with thermochemistry. All these m/z 119 ions, which are generated by the consecutive losses of CH3 and CO from 1-3, dissociate to only the ion at m/z 91 by the loss of CO. These suggest that in the CH3COC6H4+ ions, the CH3 migration from the acetyl group to the benzene ring occurs prior to the loss of CO. The amounts of the kinetic energy release (KER) accompanying with the dissociation of the m/z 119 ions from compounds 1-3 to m/z 91 ion were larger than those of the corresponding, respective methylbenzoyl ions. In the m-, and p-CH3COC6H4+ ions, the charge migrates from the incipient charge site to the ortho position via the so-called hydrogen "ring-walk." Then CH3 migrates from the acetyl group to the charge site at the ortho position in the benzene ring prior to the loss of CO. A part of the m/z 91 ions from o-, m-, and p-acetylphenyl ions may be generated via the migration of CH3 to the incipient charge site, followed by the loss of CO., 2005, 53, 2, 53, 59, Scientific journal
  • Refereed, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, WILEY-V C H VERLAG GMBH, Formation of thermotropic and lyotropic liquid crystals of bis(N-alkylethylenediamine)silver(I) nitrate, M Iida; M Inoue; T Tanase; T Takeuchi; M Sugibayashi; K Ohta, We have synthesized bis(N-hexylethylenediamine)silver(I) nitrate ([Ag(hex-en)(2)]NO3), bis(N-octylethylenediamine)silver(I) nitrate ([Ag(oct-en)(2)]NO3), and bis(N-dodecylethylenediamine)silver(I) nitrate ([Ag(dod-en)(2)]NO3) and investigated the aggregation behavior of [Ag(dod-en)(2)]NO3 and [Ag(oct-en)(2)]NO3 in the liquid state. An X-ray crystallographic analysis revealed that [Ag(dod-en)(2)]NO3 has a dinuclear structure in the crystalline state-the molecular composition unit is [Ag-2(dod-en)(4)](NO3)(2), where the two dod-en ligands bridge two silver ions that are coordinated by four nitrogen atoms. The dinuclear complex is appreciably dissociated into a mononuclear complex in solution. It was found that [Ag(oct-en)(2)]NO3 and [Ag(dod-en)(2)]NO3 form thermotropic liquid crystals in the temperature ranges 48-67 degreesC and 59-96 degreesC, respectively, and a lyotropic liquid crystal was also observed for [Ag(dod-en)(2)]NO3 in n-heptane at around room temperature in the presence of a small amount of water. The structures of the thermotropic and lyotropic liquid crystals of [Ag(dod-en)(2)]NO3 were identified as a typical smectic A (S-A) type and a nematic one, respectively. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004., Oct. 2004, 2004, 19, 3920, 3929, Scientific journal
  • Refereed, SURFACE & COATINGS TECHNOLOGY, ELSEVIER SCIENCE SA, Organosilicon ion beam for SiC heteroepitaxy, M Kiuchi; T Matsutani; T Takeuchi; T Matsumoto; S Sugimoto; S Goto, A low-energy deposition technique using a beam of organosilicon ions has been developed and successfully applied for heteroepitaxial growth of SiC on a Si substrate at temperatures of 900 1300 K. The process employs gaseous CH3SiH2CH3 in a Freeman-type-ion source to produce CH3Si+ fragment ions that are then mass-selected and deposited at 100 eV on a Si wafer. Ion energy was precisely controlled and energy fluctuation was +/-1 eV. RHEED analysis and AFM observation, respectively, showed that a thin film of SiC had been crystallized heteroepitaxially and in the form of 'nano-tiles.' The technique offers the potential for fabrication of self-assembled SiC nanostructures. (C) 2003 Elsevier B.V. All rights reserved., Jan. 2004, 177, 260, 263, Scientific journal
  • Refereed, SURFACE & COATINGS TECHNOLOGY, ELSEVIER SCIENCE SA, Deposition of SiO2 films by low-energy ion-beam induced chemical vapor deposition using hexamethyldisiloxane, T Matsutani; T Asanuma; C Liu; M Kiuchi; T Takeuchi, Room-temperature preparation of silicon dioxide films with smooth surfaces and small carbon was achieved by low-energy ion beam induced chemical vapor deposition (IBICVD) with a bubbling system for hexamethyldisiloxane (HMDSO). When prepared using bubbled HNMSO and assisted O-2 gas under irradiation of 150 eV Ar ions, the film contained carbon of 0.2% and the root mean square of the surface roughness of the film was 2.0 nm. However, when prepared using the bubbled HMDSO under irradiation of 150 eV oxygen ions, the film contained carbon less than 0.1%, and the surface roughness was 0.25 nm. It is considered that low-energy oxygen ion bombardment promotes not only chemical reaction and dissociation of HMDSO but also reactive ion beam etching on the film surface. (C) 2003 Elsevier B.V. All rights reserved., Jan. 2004, 177, 365, 368, Scientific journal
  • Refereed, SURFACE & COATINGS TECHNOLOGY, ELSEVIER SCIENCE SA, Ion beam-induced chemical vapor deposition with hexamethyldisilane for hydrogenated amorphous silicon carbide and silicon carbonitride films, T Matsutani; T Asanuma; C Liu; M Kiuchi; T Takeuchi, We report on the preparation of hydrogenated amorphous silicon carbide (a-SiC:H) film and silicon carbonitride (a-SiCN:H) film on Si (100) substrate by Ar ion beam-induced chemical vapor deposition (IBICVD) method attached with a bubbling system of hexamethyldisilane (HMDS). Ar ions and HMDS precursor with carrier gases of Ar or N-2 were introduced onto the substrate at room temperature. Fourier transform infrared (FT-IR) spectra revealed that an elimination of an organic compound and the formation of Si-C, Si-N and C-N bonds can be promoted by increasing ion impact energy. Smooth surface with a lower roughness has been achieved when Ar ion energy increases from 50 to 300 eV (C) 2003 Elsevier Science B.V. All rights reserved., Jun. 2003, 169, 624, 627, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, Comparison of surface morphologies of SiO2 films prepared by ion-beam induced chemical vapor deposition and ion-beam assisted deposition, T Matsutani; T Asanuma; C Liu; M Kiuchi; T Takeuchi, The surface topographies of silicon dioxide films prepared by low-energy ion-beam induced chemical vapor deposition (IBICVD) and ion-beam assisted deposition (IBAD) were studied using an atomic force microscopy (AFM). In the case of IBICVD, when prepared using bubbled hexamethyldisiloxane (HMDSO) and assisted O-2 gas under irradiation of 150 eV Ar ions, the root mean square (RMS) of the surface roughness of the film was 2.0 nm. However, when prepared using the bubbled HMDSO under irradiation of 150 eV oxygen ions, the RMS deduced to 0.25 nm. In the case of IBAD. when deposited using evaporated silicon monoxide under irradiation of 150 eV oxygen ions, the RMS was 0.20 nm. As a reference, the RMS of fused silica was changed from original 0.70-0.40 nm after irradiated of 150 eV oxygen ions. It is concluded that low-energy oxygen ion bombardment not only promotes chemical reaction and dissociation of precursor but also leads to a smooth surface due to reactive ion beam etching on the film surface. (C) 2003 Elsevier Science B.V. All rights reserved., May 2003, 206, 343, 347, Scientific journal
  • Refereed, Journal of High Temperature Society, Low-energy ion-beam process, Masato Kiuchi Takashi Matsumoto, Satoshi Sugimoto, Seiichi Goto, Takae Takeuchi, 2003, 29, 5, 193, 195, Scientific journal
  • Refereed, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, ROYAL SOC CHEMISTRY, Evidence for a difference in the dissociation mechanisms of acetylene (HCCH) and vinylidene (H2C=C :) from charge inversion mass spectrometry, S Hayakawa; K Tomozawa; T Takeuchi; K Arakawa; N Morishita, Vinylidene and acetylene are the simplest hydrocarbon isomers, and vinylidene is the simplest unsaturated carbene. The charge inversion mass spectra of C2H2+ cations derived from acetylene using Na, K, Rb and Cs targets were found to be clearly different from those derived from vinylidenechloride (1,1-dichloroethylene). The process of formation of the negative ions in charge inversion mass spectrometry is via near-resonant neutralization followed by spontaneous dissociation, and then endothermic negative ion formation. The intensity of the C-2(-) peak relative to the C2H- peak in these spectra increased with decreasing ionization potential of the targets for both of the isomeric C2H2+ cations. The formation of the C-2(-) anion is proposed to result from the dissociation of excited C2H2 neutrals into C-2 and H-2. The dependence on target species of the intensities of the C-2(-) peak relative to the C2H- peak for HCCH and H2C=C: cannot be rationalized by the internal energy of the excited C2H2 neutrals. The differences indicate that the isomeric C2H2 neutrals dissociate into C2H and H prior to 1,2-hydrogen atom migration., 2003, 5, 11, 2386, 2390, Scientific journal
  • Refereed, APPLIED SURFACE SCIENCE, ELSEVIER SCIENCE BV, Characterization of methyl methacrylate oligomers using secondary ion mass spectrometry, APCI mass spectrometry and molecular orbital theory, T Takeuchi; K Iwai; K Momoji; Miyamoto, I; K Saiki; K Hashimoto, The ionization efficiency and fragmentation mechanism of methyl methacrylate (MMA) oligomers (3-mersimilar to8-mer) were investigated by using secondary ion mass spectrometry (SIMS) and APCI mass spectrometry (APCI-MS). Protonation and fragmentation mechanisms of MMA oligomers were clarified by using molecular orbital (MO) methods. MMA oligomers were synthesized in anionic polymerization, and the oligomers were fractionated into 3-mersimilar to8-mer using gel permeation chromatography (GPC In SIMS of MMA oligomers (3-mersimilar to8-me), [MH](+), [MH-CH3OH](+), [MH-methyl formate](+) and [MH-2CH(3)OH-methyl formate]+ appeared. The peak intensities of adduct ions [M + Li](+), [M + Na](+) and [M + K](+) increased with the increase of the polymerization degree. The optimized geometries and H+, Li+, Na+ and K+ affinities of MMA monomer (1-mer), dimer (2-mer), and trimer (3-mer) were calculated using the PM3 and ab initio MO methods. The calculated H+, Li+, Na+ and K+ affinities increased in order of 1-mer, 2-mer and 3-mer of MMA. (C) 2002 Elsevier Science B.V All rights reserved., Jan. 2003, 203, 605, 608, Scientific journal
  • Not Refereed, J. Mass Spectrom. Soc. Jpn., Special Issue for The Nobel Prize in Chemistry and Trope Mass Spectrometry/Mass Spectrometry for Tropodegradable Molecules., Akashi, Tomoko; Arakawa, Ryuichi; Ikenishi, Yuji; Isa, Kimio; Ueda, Chiaki; Ohashi, Yoko; Nukina, Yoshihiro; Konishi, Hideyuki; Saito, Naoaki; Sakai, Ikuo; Sawada, Masami; Shida, Yasuo; Takao, Toshifumi; Takayama, Mitsuo; Taduchi, Ryo; Takeuchi, Takae; Takeda, Naohito; Tozuka, Zenzaburo; Toyota, Kiso; Naito, Kenzo; Nagao, Keisuke; Nakanishi, Toyofumi; Nomi, Takashi; Hashimoto, Yutaka; Hayaakawa, Shigeo; Hiraoka, Kenzo; Hayashi, Shu; Hirayama, Kazuo; Masuda, Katsukichi; Yamaoka, Hiroshi; Yamaoka, Ryohei; Yamawaki, Michio; Wada, Yoshinao; Kasama, Kenji; Editors, 2003, 51, 1, 346, Scientific journal
  • Refereed, Koon Gakkaishi, Low-energy ion-beam process, Kiuchi, Masato; Matsutani, Takaomi; Takeuchi, Takae; Matsumoto, Takashi; Sugimoto, Satoshi; Goto, Seiichi, 2003, 29, 5, 193, 195
  • Refereed, SURFACE & COATINGS TECHNOLOGY, ELSEVIER SCIENCE SA, Ionization of hexamethyldisilane for SiC deposition, T Takeuchi; M Tanaka; T Matsutani; M Kiuchi, We developed the SiC deposition technique by using ion beam induced deposition. In this technique, hexamethyldisilane was excited through impact with Ar ions and fragmented ions were deposited on the substrate. In this work the fragmentation mechanism of hexamethyldisilane is studied using Mass Spectrometry. To discuss the effect of excitation energy, hexamethyldisilane was excited by impact with electrons. With an impact of electrons in an energy range of 10-70 eV, two types of fragmentation, namely, the Si-Si bond dissociation and the methyl radical loss, were observed. The formation of these fragment ions, most probably trimethylsilyl cations, contributed to SiC deposition. (C) 2002 Elsevier Science B.V. All rights reserved., Sep. 2002, 158, 408, 411, Scientific journal
  • Refereed, CHEMICAL & PHARMACEUTICAL BULLETIN, PHARMACEUTICAL SOC JAPAN, Solvents inducing oxidation of hydroxylamines, S Horiyama; K Suwa; M Yamaki; H Kataoka; T Katagi; M Takayama; T Takeuchi, Hydroxylamines gradually undergo oxidation to their oximes on being dissolved in organic solvent (e.g. methanol). This phenomenon was followed by H-1-NMR and liquid chromatography-mass spectrometry (LC-MS). The oxidation rate was estimated from the peak area observed on the mass chromatogram at the protonated molecule or fragment ion on LC-atmospheric pressure chemical ionization (APCI)-MS. The results showed that the oxidation rate of hydroxylamines depended on the solvent type., Jul. 2002, 50, 7, 996, 1000, Scientific journal
  • Refereed, Journal of The Surface Finishing Society of Japan, The Surface Finishing Society of Japan, Ion Beam Induced Chemical Vapor Deposition of Hydrogenated Amorphous Sliconcarbide Films with Organosilicon, MATSUTANI Takaomi; ASANUMA Tatsuya; LIU Chang; KIUCHI Masato; TAKEUCHI Takae, 01 Dec. 2001, 52, 12, 891, 892, Scientific journal
  • Refereed, ORGANOMETALLICS, AMER CHEMICAL SOC, Nanosized, starlike silicon compounds. Synthesis and optical properties of tris[(tert-butyldimethylsilyl)oligothienylenedimethylsilyl]methylsilanes, M Ishikawa; H Teramura; KK Lee; W Schneider; A Naka; H Kobayashi; Y Yamaguchi; M Kikugawa; J Ohshita; A Kunai; HQ Tang; Y Harima; T Yamabe; T Takeuchi, Starlike molecules with arms consisting of a tert-butyldimethylsilyloligothienylenedimethylsilyl unit, MeSi[SiMe2(T)(n)SiMe2(t-Bu)](3) (7-11; n = 2-6, T = thienylene) were prepared by the reactions of tris(chlorodimethylsilyl)methylsilane, which was chosen as a core, with the tert-butyldimethylsilyl-substituted lithiooligothienylenes used for construction of the arms. UV-visible absorption and fluorescence properties of 7-11 have been studied in a dioxane solution. The molecules 7-11 showed high fluorescence quantum yields with respect to the corresponding oligothiophenes. Compounds 7 and 8 revealed longer lifetimes than those of bi- and terthiophene. The results of X-ray crystallographic analysis of the bromo derivative 12 are described. The density functional theoretical calculations were also carried out to compare the geometrical structures and the excitation energies with the available experimental data., Dec. 2001, 20, 25, 5331, 5341, Scientific journal
  • Not Refereed, Advances in Mass Spectrometry, Generation and characterization of multiple bonded silicon-containing ions using mass spectrometry 1. EI Mass spectra of silacyclobutane and bis(silacyclopropane) derivatives, Takeuchi, T; Tamura, A; Fokkens, R. H; Peeters, J. W. H; Nibbering, N. M. M; Ishikawa, M; Kabe, Y; Ando, W, Aug. 2001, 15, 745, 746, Symposium
  • Refereed, Advances in Mass Spectrometry, edited E. Gelpi, Vol.15, pp.807-808 (Wiley 2001), Ionization of Organosilicon in Freeman-type Ion Source, Takae Takeuchi; Masato Kiuchi; Takashi Matsumoto; Kazuhiko Mimoto; Satoshi Sugimoto; Seiichi Goto, Apr. 2001, International conference proceedings
  • Refereed, VACUUM, PERGAMON-ELSEVIER SCIENCE LTD, Deposition of 3C-SiC films using ECR plasma of methylsilane, T Matsutani; M Kiuchi; T Takeuchi; T Matsumoto; K Mimoto; S Goto, We deposited silicon carbide (SiC) films formation using electron cyclotron resonance (ECR) plasma of methylsilane (SiH3CH3), and investigated the influence of a carrier gas (Ar or Xe). The SiC film deposition on Si (1 0 0) was carried out at a relatively low temperature of 750 degrees C. By using ECR plasma with a carrier gas, Si-H bonds were not contained in the deposited films. Although surface morphology was very smooth in the case of using Ar carrier gas, crystallinity of the film was poor. This indicated that the him was eroded by carrier gas because surface morphologies were changed with different momentum values of ion. (C) 2000 Elsevier Science Ltd. All rights reserved., Oct. 2000, 59, 1, 152, 158, Scientific journal
  • Refereed, ORGANOMETALLICS, AMER CHEMICAL SOC, Synthesis and properties of nanosize starlike silicon compounds, M Ishikawa; KK Lee; W Schneider; A Naka; T Yamabe; Y Harima; T Takeuchi, The new starlike molecules that have a regular arrangement of an Si-Si bond and bithienylene unit were synthesized by the reaction of tris(chlorodimethylsilyl)methylsilane, which was chosen as a core, with the lithiobithienylene derivatives used for construction of the arms. The starlike molecules showed high fluorescence quantum yields and long lifetimes of the excited state., Jun. 2000, 19, 13, 2406, 2407, Scientific journal
  • Refereed, REVIEW OF SCIENTIFIC INSTRUMENTS, AMER INST PHYSICS, Production of organosilicon ions for SiC epitaxy, M Kiuchi; T Matsumoto; K Mimoto; T Takeuchi; S Goto, The production of organosilicon ions in a Freeman-type ion source were studied for SiC heteroepitaxial growth on a Si wafer. One of the possibilities for SiC epitaxy is a low energy deposition of an organosilicon ion beam. The advantage of this technique is that the organosilicon ion already has a binding of Si and C. The organosilicon ion usually also has a dipole moment which is useful for atomic arrangement on a depositing surface. Methylsilane and dimethylsilane were introduced in a Freeman-type ion source and discharged for ionization. Because of fragmentation, methylsilylene ions and methylsilicenium ions were produced. The ions were accelerated and mass selected in order to create a well defined ion beam. The energy distribution, measured by a plasma monitor, was +/- 1 eV. By using this ion beam, heteroepitaxitial growth of 3C-SiC on Si was successfully created. (C) 2000 American Institute of Physics. [S0034-6748(00)67802-4]., Feb. 2000, 71, 2, 1157, 1159, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, An ab initio molecular orbital study of the electron affinity of boron clusters, T Takeuchi; M Yamamoto; M Kiuchi, The electron affinities of boron clusters were studied using ab initio molecular orbital methods to discuss the phenomenon of clustered boron anions emitted during sputtering. Calculations were performed at the MP4(SDQ)/CBSB5 level. The calculated electron affinities of B, B(2) and B(3) were found to be 0.214, 3.66, and 3.20 eV, respectively. These values are qualitatively consistent with the experimental data of sputtering yield of B(-), B(2)(-), and B(3)(-). (C) 1999 Elsevier Science B.V. All rights reserved., Jun. 1999, 153, 1-4, 298, 301, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, Effect of charge on ion-solid interaction at the surface of two-dimensional materials, T Takeuchi; M Yamamoto; M Kiuchi, The effect of charge on the ion-solid interaction between an incident carbon ion and a surface of graphite or hexagonal boron nitride was studied using ab initio molecular orbital calculations. The computational model was based on a carbon ion with a charge of + 1. OI or - 1 incident on a {0001} surface of graphite or hexagonal boron nitride. Carbon cations were found to make a strong stable covalent bond with the surface: carbon nonions were attracted to the surface through a van der Waals interaction: carbon anions were repulsed from the graphite surface, but attracted to the h-BN surface through ionic interaction. The stability of the structure and character of the bond is discussed below with reference to the electronic structure of the interacting incident ions and the surface. In conclusion, carbon cations were found to be suitable for the production of covalent bonds. (C) 1999 Elsevier Science B.V. All rights reserved., Jan. 1999, 148, 1-4, 132, 136, Scientific journal
  • Not Refereed, Advances in Applied Plasma Science, Deposition of Silicon Carbide Films using ECR Plasma of Methylsilane, Takaomi Matsutani; Masato Kiuchi; Takae Takeuchi; Takashi Matsumoto; Kazuhiko Mimoto; Seiichi Goto, 1999, 2, 147, 152, International conference proceedings
  • Refereed, Advances in Mass Spectrometry, Ion/Molecule Reactions of Silene Radical Cations with Alkene Molecules in FT-ICR Mass Spectrometer, Takae Takeuchi; Roel Fokkens; Leo J. de Koning; Nico M. M. Nibbering, 1998, 14, 3931, 3938, International conference proceedings
  • Refereed, Advances in Mass Spectrometry, An Ab Initio MO Study on the Fragmentation Mechanism of Silacycloalkane Ions in Mass Spectrometry, Takae Takeuchi; Naomi Yonezaki; Masao Yamamoto, 1998, 14, 3581, 3588, International conference proceedings
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, Unimolecular Dissociation of Gaseous Ions in EI Mass Spectrometry, Takae Takeuchi, The fragmentation mechanisms of gaseous ions were studied experimentally and theoretically. In order to contribute to construction of fragmentation theory in mass spectra, the principle was examined using three separate approaches. Firstly, energy dependence on the fragmentation of molecular ions was investigated using the threshold electron-photoion coincidence (TEPICO) technique. Secondary, fragmentation mechanisms of molecular ions (n-butane, 1-propanol, n-propyl amine, and cycloglycylglycine cation radicals and a series of organosilicon cation radicals) in the low energy region were studied using ab initio molecular orbital (MO) methods. Finally, the dissociation (by hydrogen loss) of the first excited state (Ã2B1) of the formaldehyde cation as a function of its vibrational excitation was analyzed. Its mechanism involved an electronic predissociation by the ground X2B2 state in the tunneling regime. A statistical treatment for nonadiabatic interactions accounted for the low value of the rate constant as well as for a large isotope effect that persists over an energy interval of ca. 0.7 eV., 1998, 46, 6, 477, 482, Scientific journal
  • Refereed, APPLIED SURFACE SCIENCE, ELSEVIER SCIENCE BV, An ab initio molecular orbital study of ion-solid interaction in carbon deposition processes, M Kiuchi; T Takeuchi; M Yamamoto, The charge effects of incident carbon ions on the chemical bond formation are discussed by using ab initio molecular orbital calculations. There are two kinds of bonds which are formed in the incident carbon and graphite surface; one is a covalent bond of a carbon cation with the surface, and the other is a van der Waals bond of a carbon nonion and the surface. A carbon anion can not have a stable bond to the graphite surface. The calculated results at the MP2 level are qualitatively consistent with the results at the UHF level., Apr. 1997, 113, 652, 655, Scientific journal
  • Refereed, SURFACE SCIENCE, ELSEVIER SCIENCE BV, Effects of charge in ion-surface interactions, M Kiuchi; T Takeuchi; M Yamamoto, A theoretical investigation of the effect of charge in ion-solid interactions was carried out for the first time by ab initio molecular orbital calculations. In the case of a carbon cation interacting with a graphite surface, a strong bond is produced by covalent binding to the pi electrons of the substrate. In the case of a neutral carbon, binding is through van der Waals interactions. With an anion, no stable bound state is produced. Ion-solid interactions were thus found to vary in a clear-cut fashion according to ion species., Feb. 1997, 372, 1-3, L319, L322, Scientific journal
  • Refereed, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, The charge effects in the low-energy ion depositing processes, M Kiuchi; T Takeuchi; M Yamamoto, The charge effects in the low-energy carbon ion depositing process on a graphite surface were discussed by using an ab initio molecular orbital calculation with a UHF method and a 3-21G basis set. A positively charged carbon ion is strongly bound on a graphite surface by a covalent bond. A neutral carbon atom is adsorbed by a van der Waals interaction, A negatively charged carbon ion is not bound to a graphite surface and is repulsed. These charge effects are independent of the approach points of the incident carbon ion on a graphite surface., Jan. 1997, 121, 1-4, 154, 156, Scientific journal
  • Refereed, Shinku/Journal of the Vacuum Society of Japan, Vacuum Society of Japan, Electronic structure of incident carbon ions on a graphite surface, Masato Kiuchi; Takae Takeuchi; Masao Yamamoto, The electronic structure of an incident carbon ion on a graphite surface is discussed on the basis of ab initio molecular orbital calculations. A carbon cation forms a covalent bond with the graphite, and a carbon nonion is attracted to the graphite surface through van der Waals interaction. A carbon anion has no stable state on a graphite surface. The charge effects of incident ions become clear upon detailed examination of the electronic structure., 1997, 40, 8, 639, 642, Scientific journal
  • Refereed, BUNSEKI KAGAKU, JAPAN SOC ANALYTICAL CHEM, Unimolecular reaction of organosilicon ions in electron impact mass spectrometry .1. The fragmentation of 1,1,2,2-tetramethyldisilane, bis(dimethylsilyl) methane, and 1,2-bis (dimethylsilyl) ethane ions, T Takeuchi; M Kawai; M Tanaka; K Iwai; M Yamamoto, The electron impact (EI) mass spectra of three organosilicon compounds with two silicon atoms (CH3)(2)SiH-(CH2)(n)-SiH(CH3)(2) (n = 0 similar to 2) were measured and the fragmentation mechanisms were investigated by the deuterium-labelled technique and the B/E linked-scanning technique. In the EI mass spectrum of 1,1,2,2-tetramethyldisilanes, the main fragmentation produced m/z 73 ions via a four-center transition structure. In bis(dimethylsilyl)methane, methyl radical loss from molecular ion M(+.) was the main process, and most of the fragment ions were produced by the secondary decomposition of [M-CH3](+). In 1,2-bis(dimethylsilyl)ethane, Si-C bond cleavage occurred simultaneously with the Si-Si bond formation producing m/z 103 ions. In this process, a four-center transition state was involved. The optimized geometries of the neutral molecule and the molecular cation of bis(dimethylsilyl)methane were calculated using the ab initio MO method., 1996, 45, 6, 595, 604, Scientific journal
  • Refereed, JOURNAL OF CHEMICAL PHYSICS, AMER INST PHYSICS, SITE-SPECIFIC FRAGMENTATION FOLLOWING SI-AP CORE-LEVEL PHOTOEXCITATION OF F3SICH2SI(CH3)(3) IN THE VAPOR-PHASE, S NAGAOKA; J OHSHITA; M ISHIKAWA; K TAKANO; U NAGASHIMA; T TAKEUCHI; KOYANO, I, Apr. 1995, 102, 15, 6078, 6087, Scientific journal
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, Fragmentation Mechanisms of Butylmethylsilane, Butyldimethylsilane, and Butyltrimethylsilane Ions in EI Mass Spectrometry. 1. Experimental Approach, Takae Takeuchi; Noriko Murata; Yoshiko Yokota; Yoko Kyoya; Kaoru Iwai; Masao Yamamoto, The unimolecular dissociation of the butylmethylsilane, butyldimethylsilane, and butyltrimethylsilane ions in EI mass spectrometry has been investigated using the deuteriumlabeling technique and the B/E linked scanning method. The EI mass spectra of these alkylsilanes were characterized by the formation of silyl cation, [(CH3)nSiH3-n]+ (n=1-3), due to the cleavage of an Si-C bond and the formation of [(CH3)nSiH3-nCH2=CH2]+ due to the cleavage of a Cβ-Cγ bond. The stabilization due to an Si-C hyperconjugation is found to be a driving force to produce [CH3SiH2CH2CH2]+ from butylmethylsilane ion and [(CH3)2SiHCH2CH2]+ from butyldimethylsilane ion, respectively. The present results show that the intensities of [(CH3)nSiH3-n]+ and [M-CH3]+, increase in the order of butylmethylsilane butyldimethylsilane butyltrimethylsilane, and that of [(CH3)nSiH3-nCH2CH2]+ increases in the reverse order. The EI mass spectra of the deuterium-labeled compounds show that [M-CH3]+ is produced due to the cleavage of an Si-CH3 bond. [M-H]+ in EI mass spectra of butylmethylsilane and butyldimethylsilane is produced due to the loss of a hydrogen atom connected to the Si atom. H2 elimination from the butylmethylsilane ion occurs due to 1,4-H2 elimination via a four-membered ring formation or 1,1-H2 elimination due to a loss of two hydrogen atoms connected to the Si atom., 1995, 43, 1, 53, 63, Scientific journal
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, An Ab Initio MO Study of the Fragmentation Mechanism of the Cycloglycylglycine Ion in Mass Spectrometry, Takae Takeuchi; Noriko Higuchi; Keiko Iida; Masao Yamamoto; Toshio Matsushita; Kichisuke Nishimoto, The unimolecular dissociation of the cycloglycylglycine ion has been investigated using the ab initio MO method. The optimized geometries of possible molecular ion conformers, reaction intermediates and fragments have been calculated at the HF/6-31G//3-21G and HF/3-21G//3-21G levels. The potential energy curves for CO and NHCO eliminations from cycloglycylglycine ions have been calculated at low energy. The present study indicates that [M-CO] and [M-NHCO] are produced via proton transfers, which result in stable intermediates with a three-membered ring and a five-membered ring, respectively., 1994, 42, 5, 277, 286, Scientific journal
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, Fragmentation of Silaspiroalkanes in EI Mass Spectrometry 1. Experimental Approach, Takae Takeuchi; Naomi Yonezaki; Masao Yamamoto, The fragmentations of six silaspiroalkanes combined with four-, five-, and six-membered rings in EI mass spectrometry have been studied by a B/E linked scanning technique and an ab initio MO method. The main fragmentation process from the molecular ion is the consecutive losses of two ethylene molecules which occur via the cleavage of an Si-C bond in each ring of silaspiroalkanes. From the ab initio MO calculation, we found that the initial bond fission occurred in an Si-C bond of the molecular ion. At that time, the cleavage of an Si-C bond occurs in the smaller ring more easily than in the larger one, since the strain on the smaller ring is larger. We found the metastable decomposition due to a CH3 loss from the molecular ions of 4-silaspiro[3.5]nonane, 5-silaspiro[4.4]nonane, and 4-silaspiro[3.4]octane., 1994, 42, 3, 165, 175, Scientific journal
  • Refereed, ORGANOMETALLICS, AMER CHEMICAL SOC, SILICON-CARBON UNSATURATED-COMPOUNDS .47. DIMERIZATION OF SILENES GENERATED FROM 1,4-BIS(PENTAMETHYLDISILANYL)BENZENE AND 1-(PENTAMETHYLDISILANYL)-4-(TRIMETHYLSILYL)BENZENE AND MOLECULAR-STRUCTURE OF A DIMER, M ISHIKAWA; M KIKUCHI; A KUNAI; T TAKEUCHI; T TSUKIHARA; M KIDO, The photolysis of 1,4-bis(pentamethyldisilanyl)benzene in hexane or cyclohexane gave two isomeric dimers, 7,7,8,8-tetramethyl-3,12-bis(pentamethyldisilanyl)-13,14-bis(trimethylsilyl)-7,8-disilatricyclo[7.3.1.1(2,6)]tetradeca-3,5,9,11-tetraene (4) and 7,7,8,8-tetramethyl-3,12-bis(pen-tamethyldisilanyl)-10,14-bis(trimethylsilyl)-7,8-disilatricyclo[7.3.1.1(2,6)]tetradeca-3,5,9(13),11-tetraene (5), in a ratio of 1:1. Similar photolysis of 1-(pentamethyldisilanyl)-4-(trimethylsilyl)benzene afforded the two isomeric dimers 7 and 8, analogous to 4 and 5, in a ratio of 3:2. Heating 4 at 200-degrees-C for 2 h produced 2-[4-(pentamethyldisilanyl)-6-(trimethylsilyl)cyclohexa-1,3-dienyl]-1-[4-(pentamethyldisilanyl)-2-(trimethylsilyl)phenyl]tetramethyldisilane (3) in 85% yield. Treatment of 7 at 200-degrees-C for 2 h afforded 1-[2,4-bis(trimethylsilyl)phenyl]-2-[4,6-bis-(trimethylsilyl)cyclohexa-1,3-dienyl]tetramethyldisilane (6) in 95% yield. Compound 8 also afforded 6 under the same conditions in 90% yield. The structure of 8 was verified by an X-ray crystallographic study. Compound 8 crystallizes in the space group Cc with cell dimensions of a = 13.158(6) angstrom, b = 18.04(1) angstrom, c = 15.88(1) angstrom, beta = 104.77(4)-degrees, and V = 3645(4) angstrom3 (Z = 4)., Sep. 1993, 12, 9, 3474, 3479, Scientific journal
  • Refereed, ORGANOMETALLICS, AMER CHEMICAL SOC, SILICON CARBON UNSATURATED-COMPOUNDS .45. REACTION OF BENZOYLTRIS(TRIMETHYLSILYL)SILANE WITH ARYLLITHIUM REAGENTS, J OHSHITA; Y MASAOKA; M ISHIKAWA; T TAKEUCHI, The reaction of benzoyltris(trimethylsilyl)silane (1) with phenyllithium in ether, followed by hydrolysis of the resulting mixture gave diphenylmethyl(trimethylsiloxy)bis(trimethylsilyl)silane and phenyl(diphenylmethyl)bis(trimethylsilyl)silane in 30% and 9% yields. Treatment of 1 with (o-tolyl)lithium afforded (phenyl(o-tolyl)methyl)(trimethylsiloxy)bis(trimethylsilyl)silane and (phenyl(o-tolyl)methyl)(o-tolyl)bis(trimethylsilyl)silane (3b) in 16% and 27% yields, while with (p-xylyl)lithium, 1 produced (phenyl(p-xylyl)methyl)(trimethylsiloxy)bis(trimethylsilyl)silane and (phenyl(p-xylyl)methyl)bis(trimethylsilyl)(p-xylyl)silane (3c) in 18% and 30% yields, respectively. The reaction of 1 with phenyllithium in the presence of 2,3-dimethylbutadiene produced 4,5-dimethyl-2,2-diphenyl-1,1-bis(trimethylsilyl)-1-silacyclohex-4-ene in 76% yield. Similar reaction of 1 with (o-tolyl)lithium in the presence of 2,3-dimethylbutadiene afforded 4,5-dimethyl-2-phenyl-2-(o-tolyl)-1,1-bis(trimethylsilyl)-1-silacyclohex-4-ene and 3b in 49 and 6% yields. With (p-xylyl)lithium, 1 gave a Diels-Alder cycloadduct and 3c in 47% and 26% yields, respectively., Mar. 1993, 12, 3, 876, 879, Scientific journal
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, Fragmentation of alkyldisilanes I. 1,1,2,2-tetramethyldisilane, Masao Yamamoto; Motoko Tanaka; Yoshiko Yokota; Takae Takeuchi, The fragmentation of 1,1,2,2-tetramethyldisilane by using a deuterium labeling technique, a B/E linked scanning technique and ab initio MO methods was studied. In 70eV-EIMS the base peak was observed at m/z 59, which is produced by the simple cleavage of an Si-Si bond. It was confirmed by the ab initio MO calculation that the formation of this ion might occur predominantly. It was concluded that the abundant ion at m/z 73 was produced by a 1,2-hydrogen shift from one silicon atom to the other with simultaneous reverse shift of a methyl group., 1993, 41, 5, 277, 286, Scientific journal
  • Refereed, Chemistry Express, Ab Initio MO Study of Fragmentation Mechanisms of Ethylmethylsilane and Methylpropylsilane Radical Cations, Takae Takeuchi; Yoko Kobayashi; Yoshiko Yokota; Masao Yamamoto, 1993, 8, 9, 661, 664, Scientific journal
  • Refereed, Chemistry Express, Fragmentation of Silaspiroalkanes in EI Mass Spectrometry 2.Theoretical Approach, Takae Takeuchi; Naomi Yonezaki; Kaoru Iwai; Masao Yamamoto, 1993, 8, 9, 777, 780, Scientific journal
  • Refereed, Mass Spectroscopy, The Mass Spectrometry Society of Japan, Mass Spectra of Alkylsilanes 2. Methylpropylsilane, Dimethylpropylsilane, Trimethylpropylsilane, and Methylpentylsilane, Yoshiko Yokota; Takae Takeuchi; Masao Yamamoto, We have studied the fragmentation of four alkylsilanes (CH3SiH2C3H7, (CH3)2SiHC3H7, (CH3)3SiC3H7, CH3SiH2C5H11) under EIMS. The characteristic ions of [M-H]+, [M-H2], m/z 73 and m/z 45 appeared from methylpropylsilane and methylpentylsilane in a similar manner as the fragmentation of butylmethylsilane reported in a previous paper. From the results of deuterium labelled compounds it was confirmed that [M-H]+ is produced by eliminating an H-atom on Si-atom. It was also suggested that [M-H2] is produced by eliminating two H-atoms on Si-atom with the H/D scrambling. The ion of m/z 73 is stabilized by σ-π conjugation. The ion of m/z 45 is mainly formed as the secondary scission ion. By replacing an H-atom with a methyl group on Si-atom the mass spectra of the resulting alkylsilanes become similar to those of the corresponding alkanes., 1991, 39, 5, 225, 233, Scientific journal
  • Refereed, JOURNAL OF PHYSICAL CHEMISTRY, AMER CHEMICAL SOC, NONADIABATIC UNIMOLECULAR REACTIONS .4. ISOLATED STATE DECAY IN THE FRAGMENTATION OF THE FORMALDEHYDE CATION, JC LORQUET; T TAKEUCHI, Mar. 1990, 94, 6, 2279, 2283, Scientific journal
  • Refereed, Advances in Mass Spectrometry, Fragmentation of the Several Alkylsilane Compounds in EIMS, M. Yamamoto; M. Horiguchi; Y. Yokota; M. Tanaka; T. Takeuchi; F. Takemura, 1989, 11A, 974, 975, Scientific journal
  • Refereed, Advances in Mass Spectrometry, A Statistical Study of Nonadiabatic Reactions. Application to the Fragmentation of the Formaldehyde, B. Leyh-Nihaut; T. Takeuchi; J. C. Lorquet, 1989, 11A, 786, 787, International conference proceedings
  • Not Refereed, IMS Ann. Rev., Unimolecular Fragmentation of Energy Selected Metastable Ions in Formaldehyde, Takae Takeuchi; Shinzo Suzuki; Inosuke Koyano, 1989, 1989, 91, 92
  • Refereed, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, CHEMICAL SOC JAPAN, AN MO STUDY OF FRAGMENTATION MECHANISM OF ETHANE AND PROPANE RADICAL CATIONS, Y OSAMURA; T TAKEUCHI; K NISHIMOTO, Oct. 1988, 61, 10, 3387, 3391, Scientific journal
  • Refereed, Mass Spectroscopy, The Mass Spectrometry Society of Japan, Mass Spectra of Alkylsilanes. 1. Ethylmethylsilane, Methylpropylsilane, Diethylsilane, and Butylmethylsilane, Masao Yamamoto; Masae Horiguchi; Yoshiko Yokota; Motoko Tanaka; Takae Takeuchi; Kaoru Iwai; Fukuo Takemura, We have studied the fragmentation of four lower alkylsilanes (CH3SiH2C2H5, CH3SiH2-C3 H7, (C2H5)2SiH2, CH3SiH2C4H9) appeared in EIMS. The main fragment ions of m/z 45 (CH3 SiH2+) of ethylmethylsilane and methylpropylsilane were produced by the cleavage of the Si-C bond on the longer alkyl chain side, respectively, and the large fragment ion of m/z 59 (C2H5 SiH2+) of diethylsilane was also produced by the cleavage of Si-C bond. The base peak of butylmethylsilane was m/z 73 (CH3SiH2CH2CH2+). The H-loss ions [M-H]+ and the H2-loss ions [M-H2]+ of CH3SiH2C2H5 and CH3SiH2C3H7 were very abundant, especially at low ionization energies. The optimized geometries of neutral molecules and molecular cations of methylpropylsilane and butylmethylsilane were calculated by using ab initio MO method. The Si-C bond on the larger alkyl group side of molecular cation was lengthened from 1.87Å to 2.17Å and the net charge on Si-atom was positive. This showed that the Si-C bond was easy to cleavage and the fragment containing Si-atom to have a positive charge., 1988, 37, 2, 117, 128, Scientific journal
  • Refereed, Advances in Mass Spectrometry, Theoretical Study of Electron Impact Mass Spectrometry. Ab Initio MO Study of the Fragmentation of n-C4H10, C3H7OH and C3H7NH2, Takae Takeuchi; Masao Yamamoto; Kichisuke Nishimoto, 1986, 10B, 1099, 1100, International conference proceedings
  • Refereed, Journal of the Mass Spectrometry Society of Japan, The Mass Spectrometry Society of Japan, Theoretical Study on Electron Impact Mass Spectrometry. III. Ab Initio MO Study on the Fragmentation of Propylamine, Takae Takeuchi; Masao Yamamoto; Kichisuke Nishimoto, In order to elucidate the fragmentation mechanism of propylamine following the low energy electron bombardment, the potential energy curves have been calculated by means of ab initio MO methods (STO-3G/4-31G). The present study indicates that the fragmentation due to Cα-Cβ bond cleavage is the main process at the low energy., 1986, 34, 5, 267, 278, Scientific journal
  • Not Refereed, IMS Ann. Rev., Unimolecular Decomposition: Fragmentation of n-C4H10+., Takae Takeuchi; Masao Yamamoto; Shinzo Suzuki; Kenichiro Tanaka; Inosuke Koyano, 1986, 1986, 87, 88
  • Refereed, INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, ELSEVIER SCIENCE BV, THEORETICAL-STUDY OF ELECTRON-IMPACT MASS-SPECTROMETRY .2. ABINITIO MO STUDY OF THE FRAGMENTATION OF IONIZED 1-PROPANOL, T TAKEUCHI; S UENO; M YAMAMOTO; T MATSUSHITA; K NISHIMOTO, 1985, 64, 1, 33, 48, Scientific journal
  • Refereed, Doctoral Thesis (Ph.D.), Theoretical Study on Fragmentation Mechanisms of Organic Ions in EI Mass Spectrometry, Takae Takeuchi, 1985, 1, 109, Doctoral thesis
  • Refereed, Mass Spectroscopy, The Mass Spectrometry Society of Japan, Mass Spectra of Cyclodipeptides, Masao Yamamoto; Tomoko Fukuma; Keiko Kashiwagi; Takae Takeuchi; Yuji Ikenishi; Yuzo Nakagawa, The mass spectral fragmentation of the cyclodipeptides were investigated. The main fragmentation processes for the peptides were almost the same. In the case of compounds that have the large side chains, the cyclic skeletal ions generated by the loss of the side chain group were followed by the further fragmentations. The important ions arising from cycloglycylglycine in 70 eV-mass spectrum were of m/z 86 [M-CO] and of m/z 71 [M-NHCO] from which further fragmentations occurred. The metastable ion spectrum by B/E linked scan method indicated that the m/z 30 (the most abundant ion in 70 eV-mass spectrum) was formed from the process via the ion of m/z 86., 1984, 32, 5, 387, 395, Scientific journal
  • Refereed, International Journal of Mass Spectrometry and Ion Physics, Theoretical study of electron impact mass spectrometry. I. Ab initio MO study of the fragmentation of n-butane, Takae Takeuchi; Masao Yamamoto; Kichisuke Nishimoto; Hidetsugu Tanaka; Kozo Hirota, The fragmentation mechanism of n-butane by low-energy electron bombardment has been studied by means of the ab initio MO method. Optimized geometries of possible n-butane cation conformers, reaction intermediates and fragments have been calculated using the energy gradient technique. The results suggest that the fragmentation to C1 + C3 is more favorable than that to C2 + C2, when the electron impact energy is at most only a few eV above the ionization threshold. The base peak at m/z 43 has been calculated to be due to the 2-propyl cation. In the course of fragmentation to C1 + C3 proton tunneling is expected. © 1983., 01 Sep. 1983, 52, 2-3, 139, 148, Scientific journal
  • Refereed, International Journal of Mass Spectrometry and Ion Physics, A study of low energy electron impact mass spectra using molecular orbital theory, M. Yamamoto; T. Takeuchi; K. Nishimoto, The fragmentation mechanism of n-propylalcohol and n-propylamine at low energy electron impact has been studied by means of ab initio MO method. The results suggest that in n-propylalcohol the dehydration process is favorable and that in n-propylamine the process of NH3 loss analogous to the dehydration of n-propyl-alcohol is unfavorable. © 1983., 1983, 46, C, 239, 242, Scientific journal
  • Refereed, INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, ELSEVIER SCIENCE BV, A STUDY OF LOW-ENERGY ELECTRON-IMPACT MASS-SPECTRA USING MOLECULAR-ORBITAL THEORY, M YAMAMOTO; T TAKEUCHI; K NISHIMOTO, 1983, 46, JAN, 239, 242, Scientific journal
  • Refereed, INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, ELSEVIER SCIENCE BV, THEORETICAL-STUDY OF ELECTRON-IMPACT MASS-SPECTROMETRY .1. ABINITIO MO STUDY OF THE FRAGMENTATION OF N-BUTANE, T TAKEUCHI; M YAMAMOTO; K NISHIMOTO; H TANAKA; K HIROTA, 1983, 52, 2-3, 139, 148, Scientific journal
  • Not Refereed, Kagaku, 化学同人, Theory of Chemical Reactivity-Quantum Chemical and Statistical Thermodynamical Interpretations for Chemical Equilibrium and Reaction Velocity, P. Carskey; J. Pancir; R. Zahradnik; Translation into Japanese; Takae Takeuchi; Kichisuke Nishimoto, 1981, 36, 2, 84, 94
  • Refereed, PLOS ONE, Public Library of Science (PLoS), Identification of fragment ions produced by the decomposition of tetramethyltin and the production of low-energy Sn+ ion beam, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Tetramethyltin was decomposed in an ion source and the fragment ions produced were identified using a low-energy mass-selected ion beam machine. Dominant fragment ions were found to be H+, CH2+, and Sn+. Subsequently, fragment ions were mass-selected. The mass spectrum of the selected ions indicated that only a single peak appeared at the mass number of 120 u, being suggestive of the presence of 120Sn+ ions. The ion energy was set at the range of 20–100 eV. The Sn+ ion beam was irradiated to a Si substrate, and a film was then found deposited on the substrate after the ion beam irradiation. An X-ray diffraction measurement showed that the film obtained was metallic Sn. Then, the Sn+ ion beam was irradiated to a quartz crystal microbalance substrate. We found that most of the irradiated Sn+ ions were adhered to the substrate, at the ion energy levels of 25 and 58 eV, producing the Sn film, whereas a 107 eV Sn+ beam caused a significant proportion of Sn atoms in the film to detach from the substrate, probably due to sputtering., 25 Jun. 2021, 16, 6, e0253870, e0253870, Scientific journal
  • Medical Mycology Journal, (一社)日本医真菌学会, 気相を介した異種真菌間の成長抑制作用, 木内 葉子; 鈴木 孝仁; 竹内 孝江; 木村 知子; 木内 正人, Oct. 2012, 53, Suppl.1, 67, 67
  • Medical Mycology Journal, (一社)日本医真菌学会, Aspergillus fumigatusおよびFusarium solaniにおける気相を介した増殖抑制作用と作用物質について, 鈴木 孝仁; 木村 知子; 竹内 孝江; 木内 正人, Sep. 2016, 57, Suppl.1, 96, 96
  • Medical Mycology Journal, (一社)日本医真菌学会, 医真菌Aspergillus fumigatusとFusarium solaniに見られる揮発性有機化合物による自己増殖抑制と多感作用, 鈴木 孝仁; 竹内 孝江; 木村 知子; 田中 春菜; 木内 正人, Oct. 2014, 55, Suppl.1, 107, 107
  • Refereed, PLOS ONE, Public Library of Science (PLoS), Low-energy Ar+ and N+ ion beam induced chemical vapor deposition using hexamethyldisilazane for the formation of nitrogen containing SiC and carbon containing SiN films, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, We proposed an experimental methodology for producing films on substrates with an ion beam induced chemical vapor deposition (IBICVD) method using hexamethyldisilazane (HMDS) as a source material. In this study, both HMDS and ion beam were simultaneously injected onto a Si substrate. We selected Ar+ and N+ as the ion beam. The energy of the ion beam was 101 eV. Temperature of the Si substrate was set at 540 °C. After the experiments, films were found to be deposited on the substrates. The films were then analyzed by Fourier transform infrared (FTIR) spectroscopy, stylus profilometer, X-ray diffraction, atomic force microscopy, and X-ray photoelectron spectroscopy (XPS). The FTIR and XPS results showed that silicon carbide films containing small amount of nitrogen were formed when Ar+ ions were injected in conjunction with HMDS. On the other hand, in the cases of N+ ion beam irradiation, silicon nitride films involving small amount of carbon were formed. It was noted that no film deposition was observed when HMDS alone was supplied to the substrates without any ion beam injections., 27 Oct. 2021, 16, 10, e0259216, e0259216, Scientific journal
  • Refereed, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, Low-energy O+ ion beam induced chemical vapor deposition using tetraethyl orthosilicate for silicon dioxide film formation, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, Jan. 2022, 511, 113, 117, Scientific journal
  • Refereed, AIP Advances, AIP Publishing, Low-energy O+ ion beam induced chemical vapor deposition using hexamethyldisilane or hexamethyldisilazane for silicon dioxide film formation, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Masato Kiuchi, Dec. 2021, 11, 12, 125328, 125328, Scientific journal
  • Refereed, 04 Dec. 2021, 511, 113, 117
  • Refereed, Nuclear Inst. and Methods in Physics Research, B, Low-energy Ar + ion beam induced chemical vapor deposition of silicon carbide films using dimethylsilane, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi; Accepted 2022-08-01, 2022
  • Refereed, Thin Solid Films, Elsevier BV, Low-energy oxygen ion beam induced chemical vapor deposition using methylsilane or dimethylsilane for the formation of silicon dioxide films, Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Masato Kiuchi, Sep. 2022, 760, 139508, 139508, Scientific journal

MISC

  • Not Refereed, 01 Mar. 2022, 8, 1, 4
  • Not Refereed, Chemistry & Chemical Industry, Report from IUPAC 49th General Assembly and 46th World Chemistry Congress, Takae Takeuchi, Feb. 2018, 71, 2, 139, 140, Introduction scientific journal
  • Not Refereed, J. Mass Spectrom. Soc. Jpn., The Mass Spectrometry Society of Japan, The History of the Division of Fundamentals, Ionization and Ion Chemistry in Mass Spectrometry, Takae Takeuchi, Apr. 2014, 62, 2, 15, 23
  • Not Refereed, 日本化学会講演予稿集, Development of the portable fungal odor sensor for cultural property conservation, TAKEUCHI TAKAE; KIMURA TOMOKO; TANAKA HARUNA; SUZUKI TAKAHITO; IWAGUCHI SHIN'ICHI; KANEKO SACHIYO; KIUCHI MASATO; OKUBO MAMORU; HASHIMOTO YOSHIO; HOSOKAWA YOSHINORI; MATSUTANI TAKAOMI, 12 Mar. 2010, 90th, 1, 140, Others
  • Not Refereed, In Papers of JSPS-IIAS Joint International Symposium on Conservation Technology for Cultural Heritage, held at the International Institute for Advanced Studies, Microbial volatile organic compounds (MVOCs) and their presumed physiological role for growth regulation in the soil-derived fungal organisms., Takahito Suzuki; Sachiyo Kaneko; Haruna Tanaka; Tomoko Kimura; Takae Takeuchi; Masato Kiuchi; Shin-ichi Iwaguchi; Koji Yokoyama, 2009, 1, 1, 46, 51
  • Not Refereed, 第4回Cat-CVD研究会資料, 高温タングステン表面での有機ケイ素のフラグメンテーション, 吉村智; 木内正人; 竹内孝江; 浜口智志, Jun. 2007
  • Not Refereed, 真空に関する連合講演会講演予稿集, イオンビーム誘起CVD法による酸化スズ薄膜の作製, FUJIKAWA YUKA; KIUCHI MASAHITO; MATSUTANI TAKAOMI; TAKEUCHI TAKAE, 2005, 46th, 103
  • Not Refereed, 応用物理学会学術講演会講演予稿集, 低エネルギーイオンビーム誘起CVD法によるGe‐C薄膜の形成, MATSUTANI TAKAOMI; ASANUMA TATSUYA; KIUCHI MASATO; TAKEUCHI TAKAE, 30 Aug. 2003, 64th, 2, 575
  • Not Refereed, 21世紀連合シンポジウム論文集, 電子ペーパー実現のための低エネルギーイオンビーム技術, KIUCHI MASATO; MATSUTANI TAKAOMI; ASANUMA TATSUYA; RYU SHO; TAKEUCHI TAKAE, 23 Nov. 2002, 1st, 249, 250
  • Not Refereed, 表面技術協会講演大会講演要旨集, 液体有機金属を用いたイオンビーム誘起CVD法の開発, MATSUTANI TAKAOMI; KIUCHI MASATO; TAKEUCHI TAKAE, 06 Sep. 2002, 106th, 276, 279
  • Not Refereed, 高温学会誌, Ion Beam Induced CVD Method with Organosilicon Precursor, MATSUTANI Takaomi; ASANUMA Tetsuya; LIU Chang; KIUCHI Masato; TAKEUCHI Takae; GOTO Seiichi, 20 Jan. 2002, 28, 1, 12, 12
  • Not Refereed, イオン注入表層処理シンポジウム予稿集, ヘキサメチルジシランを用いたイオンビーム誘起CVD法, KIUCHI MASATO; MATSUTANI TAKAOMI; TAKEUCHI TAKAE, 30 Nov. 2001, 17th, 15, 17
  • Refereed, Journal of Vacuum Society of Japan, Crystal Growth of SiC Using Organosilicon Ion Beam, Masato Kiuchi; Takaomi Matsutani; Takae Takeuchi; Takashi Matsumoto; Kazuhiko Mimoto; Seiichi Goto, Jan. 2000, 43, 3, 278, 278
  • Not Refereed, イオン注入表層処理シンポジウム予稿集, 有機ケイ素イオンビームを用いたSiCの高速制膜, KIUCHI MASATO; MATSUTANI TAKAOMI; TAKEUCHI TAKAE; MATSUMOTO TAKASHI; MIMOTO KAZUHIKO; GOTO SEIICHI, 19 Nov. 1999, 15th, 71, 72
  • Not Refereed, 真空に関する連合講演会講演予稿集, 有機ケイ素イオンビームを用いたSiCの結晶成長, KIUCHI MASATO; MATSUTANI TAKAOMI; TAKEUCHI TAKAE; MATSUMOTO TAKASHI; MIMOTO KAZUHIKO; GOTO SEIICHI, 10 Nov. 1999, 40th, 304, 305
  • Not Refereed, 表面技術協会講演大会講演要旨集, Mass production technology of SiC thin film formation using organic silicon ion., 木内正人; 松谷貴臣; 竹内孝江; 松本貴士; 美本和彦; 後藤誠一, 17 Sep. 1999, 100th, 172
  • Not Refereed, 大阪工業技術研究所報告, 工業技術院大阪工業技術研究所, イオンビームプロセスにおける電荷の役割.正イオンと負イオンはどう違うか, 竹内 孝江; 木内正人他, 1998, 392, 392, 29, 33
  • Not Refereed, Ionics: The Journal of ion science and technology, Electronic Structures in Ion-Surface Interactions, Masato Kiuchi; Takae Takeuchi; Masao Yamamoto, Jul. 1997, 23, 7, 3, 7, Introduction commerce magazine
  • Not Refereed, Center Report, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, Takae Takeuchi, Jun. 1993, 14, 117, 118
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1992, 13, 105, 106
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1991, 12, 225, 233
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1990, 11, 103, 104
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1989, 10, 107, 108
  • Not Refereed, Advances in Mass Spectrometry, A Statistical Study of Nonadiabatic Reactions. Application to the Fragmentation of the Formaldehyde Ion, TAKEUCHI Takae; B. Leyh-Nihaut; T. Takeuchi; J. C. Lorquet, 1989, 11A, 786, 787
  • Not Refereed, Doctoral Thesis, Nara Women's University, Physicochemical Studies on the Fragmentation Mechanisms of Organic Ions in Mass Spectrometry, TAKEUCHI Takae, 1985, 1, 109
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1984, 5, 84, 85
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1982, 3, 220, 221
  • Not Refereed, Ab Initio MO Calculation of Electronic Structures of Organic Radicals, TAKEUCHI Takae, 1981, 2, 220, 221
  • Not Refereed, 化学, 化学同人, 化学反応性の理論-化学平衡と化学反応速度の量子化学的および統計熱力学的解釈-(共訳), TAKEUCHI Takae; P. Carskey; J. Pancir; R. Zahradnik著; 竹内孝江; 西本吉助訳, 1981, 36, 2, 84, 94
  • Feb. 2018, 71, 2, 139, 140
  • 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 質量分離有機金属分子イオンビーム堆積法のストイキオメトリ成膜への応用, 吉村智; 杉本敏司; 竹内孝江; 村井健介; 木内正人, 2019, 80th
  • 日本水環境学会シンポジウム講演集, ファインバブルに分散したオリーブオイルの質量分析, 木内正人; 岩松雅子; 竹内孝江, 2014, 17th

Books etc

  • 978-1782629474, IUPAC Project 2012-005-1-500
  • Definitions of terms relating to mass spectrometry, 4th Ed., International Academic Publishing Co., Ltd., Ken-ichi Yoshino; Kenichi Iwamoto; Hideya Kawasaki; Tomoya Kinumi; Masayuki Kubota; Mitsutoshi Setou; Yoshihiko Takinami; Takae Takeuchi; Yasuhide Naito; Yasuhide Naitou; Jiro Matsuo, Fragmentation Theory, 11 Mar. 2020
  • Textbook of Chemistry Experiments, The 5th Edition, Vol.2, Shintosha Corp., Ed. by Chemistry Course-Department of Chemistry-Biology-Environmental Science-Faculty of Science-Nara Women's University, Chapter 15, 30 Mar. 2018, Not Refereed, 9784878061394
  • Textbook of Chemistry Experiments, The 4th Edition, Vol.2, Shintosha Corp., Chapter 15, 2015, Not Refereed, 9784878061301
  • Contemporary Mass Spectrometry -From Fundamentals to Applications, Kagakudojin, Edited by; Mitsuo Takayama; Shigeo Hayakawa; Yoshihiko Takinami; Yoshio Wada, Chapter 11 Computational Chemistry of Ions, 15 Jan. 2013, xix, 514p, Not Refereed, 9784759814132, cinii_books
  • Guidebook of Easy and Rapid Microbial Test Methods. Chap.9-5 Microbial Contamination and Rapid Microbial Test Methods of Cultural Properties, Techno System, Takahito Suzuki; Masato Kiuchi; Takae Takeuchi, Microbial Contamination and Rapid Microbial Test Methods of Cultural Properties, Nov. 2013, 24, 758p, 9784924728691, cinii_books
  • Microbial Biodeterioration of Cultural Property, National Research Institute for Cultural Properties, Tokyo (NRICPT), 2013, Not Refereed
  • 平成23年度文部科学省科学技術人材育成費補助金女性研究者養成システム改革加速事業「伝統と改革が創る次世代女性研究者養成拠点」事業報告書, 奈良女子大学男女共同参画推進室 女性研究者養成システム改革推進本部, 2012, Not Refereed
  • 「59th ASMS Conference on Mass Spectrometry and Allied Topics」に参加して, 奈良女子大学男女共同参画推進室 女性研究者養成システム改革推進本部, 2012, Not Refereed
  • 化学実験テキスト(改訂版), 奈良女子大学理学部化学科, 2011, Not Refereed
  • Microbial volatile organic compounds (MVOCs) and their presumed physiological role for growth regulation in the soil-derived fungal organisms, Proceedings of JSPS-IIAS Joint International Symposium on Conservation Technology for Cultural Heritage, International Institute for Advanced Studies, Kyoto, 2009, Not Refereed
  • マススペクトロメトリー関係用語集, 株式会社 国際文献印刷社, 2009, Not Refereed
  • Microbial volatile organic compounds (MVOCs) and their presumed physiological role for growth regulation in the soil-derived fungal organisms, Proceedings of JSPS-IIAS Joint International Symposium on Conservation Technology for Cultural Heritage, International Institute for Advanced Studies, Kyoto, 2009, Not Refereed
  • 新農業環境工学, 養賢堂, 2004, Not Refereed
  • 質量分析初級者講習会テキスト, 国際文献印刷社, 2000, Not Refereed
  • Unimolecular Decompositions and an Ion/Molecule Reaction of Activated Organosilicon Ions in the Gas Phase, Reactive Organometallics, 1998, Not Refereed
  • 質量スペクトルデータ集, 日本質量分析学会, 1998, Not Refereed
  • Unimolecular Decompositions and an Ion/Molecule Reaction of Activated Organosilicon Ions in the Gas Phase, Reactive Organometallics, 1998, Not Refereed
  • Database of Mass Spectra, Mass Spectrometry Society of Japan, 1998, Not Refereed
  • Control of Bindings of Incident Ion and Surface, Proceedings of the 4th International Symposium on Sputtering and Plasma Processes, 1997, Not Refereed
  • Differences between positive and negative ions in carbon ion beam deposition processes II. Effects on incident sites on a graphite surface, Proceedings of the 12th Symposium on Surface Layer Modification by Ion Implantation, 1996, Not Refereed
  • Differences between positive and negative ions in carbon ion beam deposition processes II. Effects on incident sites on a graphite surface, Proceedings of the 12th Symposium on Surface Layer Modification by Ion Implantation, 1996, Not Refereed
  • Differences between positive and negative ions in carbon ion beam deposition processes I. Bond formation on a graphite surface, Proceedings of the 7th Symposium on Beam Engineering of Advanced Material Syntheses, 1996, Not Refereed
  • An Ab Initio MO Study of The Fragmentation Mechanism of Cyclopeptide Ions in Mass Spectrometry, "Proceedings of the Kyoto '92 International Conference on Biological Mass Spectometry" Ed. by T. Matsuo, San-ei Publishing Co. , Kyoto, 1993, Not Refereed
  • Fragmentation Mechanism of Silacycloalkanes in EI Mass Spectrometry, Proceedings of International 5th Beijing Conference and Exhibition on Instrumental Analysis, B. Mass Spectometry, 1993, Not Refereed
  • An Ab Initio MO Study of the Fragmentation Mechanism of Cycloglycylglycine Ion in Mass Spectrometry, "Proceedings of International 5th Beijing Conference and Exhibition on Instrumental Analysis, B. Mass Spectrometry", Ed. S. Dezhong, Peking Univ. Press, Beijing, 1993, Not Refereed
  • An Ab Initio MO Study of The Fragmentation Mechanism of Cyclopeptide Ions in Mass Spectrometry, "Proceedings of the Kyoto '92 International Conference on Biological Mass Spectometry" Ed. by T. Matsuo, San-ei Publishing Co. , Kyoto, 1993, Not Refereed
  • Fragmentation Mechanism of Silacycloalkanes in EI Mass Spectrometry, Proceedings of International 5th Beijing Conference and Exhibition on Instrumental Analysis, B. Mass Spectometry, 1993, Not Refereed
  • Fragmentation of Silacycloalkanes appeared in EIMS, Proceedings of the First New Zealand-Japan Bilateral Conference, New Aspects of Organic Chemistry, 1992, Not Refereed
  • Textbook of Chemistry Experiments, The 6th Edition, Vol.2, Shintosya Co.,Ltd., Ed. by Chemistry Course-Department of Chemistry-Biology-Environmental Science-Faculty of Science-Nara Women's University, 30 Mar. 2021
  • Textbook of Chemistry Experiments, The 5th Edition, Vol.1, Shintosya Co.,Ltd., Ed. by Chemistry Course-Department of Chemistry-Biology-Environmental Science-Faculty of Science-Nara Women's University, 30 Sep. 2020
  • Referential standard on a curriculum for the qualitative assurance of a university education in each field, 日本学術会議, SCJ Kawai; Nishihara; Takae Takeuchi; Kimizuka; Sugawara; Kurihara; Goto; Sawamoto; Trashima, 6章 専門性と市民性を兼備するための教養教育.., 21 Feb. 2019
  • 日本学術振興会研究開発専門委員会自立型・複合型AI先端計測の新しい価値創造研究成果報告書, 三共印刷, 岡本和也, pp.231-235 (1.2)質量スペクトル(MS)とイオンモビリティスペクトル(IMS)-カビ臭分析によるカビ種推定ソフトウェアの開発:文化財保全への応用, 31 Mar. 2021

Presentations

  • S. Sano; S. Horiyama; M. Hayashi; F. Hara; C. Honda; M. Hagimori; K. Nosaka; T. Takeuchi, The 70th Annual Conference on Mass Spectrometry, Japan, Study of Evaluation Method for Inhibitors of Enzyme Activity Using Substrate Specificity of Aldo-keto Reductase by LC-MS, 24 Jun. 2022, 22 Jun. 2022, 24 Jun. 2022
  • Takae Takeuchi, The 70th Annual Conference on Mass Spectrometry, Japan, Development of an Ion Mobility Spectrometer for Breath Analysis: Theoretical Study of the Structure of Organic Ions Produced by Ambient Electron Emission Ionization, 24 Jun. 2022, 22 Jun. 2022, 24 Jun. 2022
  • S. Yoshimura; S. Sugimoto; T. Takeuchi; M. Kiuchi, The 69th JSAP Spring Meeting 2022, Low-energy ion beam induced CVD for the formation of silicon oxide and silicon nitride, 24 Mar. 2022, 22 Mar. 2022, 26 Mar. 2022
  • Takae Takeuchi, The 8th workshop of JSPS R026 committee on future design of advanced measurement technologies, Ambient ionization processes of volatile organic compounds by ion mobility spectrometry: Analyses of microbial volatile metabolites and volatile organic compounds in the breath, 01 Mar. 2022, 01 Mar. 2022, 02 Mar. 2022
  • Aya Ichimura; Takae Takeuchi, The 69th Annual Conference on Mass Spectrometry 2021, Formation of Gaseous Ions from Ni(acac)2, Ni(hfac)2, Co(acac)2, and Co(hfac)2 Using EIand ESI Mass Spectrometry III. Density Functional Theoretical Calculations, 21 May 2021, 19 May 2021, 21 May 2021
  • Mariko Hattori; Tomohiro Akashi; Takae Takeuchi, The 69th Annual Conference on Mass Spectrometry, Mass Spectrometric Analysis of Volatile Metabolites in Aspergillus nidulans for Sesquiterpene Biosynthetic Pathway Elucidation Ⅹ. AN3280 Gene Expression-enforced Strains., 19 May 2021, 19 May 2021, 21 May 2021
  • Ayano Matsuo; Akika Oshiro; Takae Takeuchi, The 9th Ion Mobility Symposium, Molecular structure estimation of microbial volatile organic ions in the environment of cultural properties by Ion Mobility Spectrometry and collision cross section calculations 2., 15 Apr. 2021, 15 Apr. 2021, 15 Apr. 2021
  • Mariko Hattori; Takae Takeuchi; Tomohiro Akashi, The 101st CSJ Annual Meeting (2021), Elucidation of sesquiterpene biosynthetic pathway in Aspergillus nidulans by mass spectrometric analysis of volatile metabolites: IX AL37 strain, 20 Mar. 2021, 19 Mar. 2021, 22 Mar. 2021
  • Aya Ichimura; Takae Takeuchi, The 101st CSJ Annual Meeting (2021), Reaction Mechanism of Gaseous Ions Produced from Co(acac)2, Co(hfac)2, Ni(acac)2, and Ni(hfac)2 Using ESI and EI Mass Spectrometry II., 20 Mar. 2021, 19 Mar. 2021, 22 Mar. 2021
  • Akika Oshiro; Ayano Matsuo; Hiromi Hayashi; Takae Takeuchi, The 101st CSJ Annual Meeting (2021), Molecular structure estimation of microbial volatile organic ions in the environment of cultural properties by Ion Mobility Spectrometry and collision cross section calculations, 19 Mar. 2021, 19 Mar. 2021, 22 Mar. 2021
  • Takae Takeuchi, The Society of Sensing Technology of Japan, The 213rd Research Lectures, Fungal detection by MVOC monitoring : Development of fungal monitoring system in cultural properties and innovation of a new scientific field, 25 Nov. 2020, 25 Nov. 2020, 25 Nov. 2020
  • Yoshimi Nakamura; Takae Takeuchi, Online Student Symposium of Japan Society for Molecular Science, Theoretical study on molecular structures and collision cross sections of the immunoglobulin G Fc domain glycopeptide ions 3. Effects of glycosylation, a hydroxyl group and the electric charge, 15 Sep. 2020, 14 Sep. 2020, 17 Sep. 2020
  • Mariko Hattori, Tomohiro Akashi, Takae Takeuchi, The 68th Annual Conference on Mass Spectrometry, Japan, Mass Spectrometric Analysis of Volatile Metabolites in Aspergillus nidulans for Sesquiterpene Biosynthetic Pathway Elucidation VIII. AN3280 Gene Expression-enforced Strains: LO8925 and LO8910HA-pyrG2., 12 May 2020, 11 May 2020, 13 May 2020
  • Akika Oshiro; Takae Takeuchi, The 68th Annual Conference on Mass Spectrometry, Japan, Identification of Solid-Derived Fungal Species in an Invisible Stage by Multivariate Analysis of Ion Mobility Spectra and GCMS Data of Microbial Volatile Organic Compounds (MVOC) II, 12 May 2020, 11 May 2020, 13 May 2020, rm:research_project_id
  • Aya Ichimura; Takae Takeuchi, The 68th Annual Conference on Mass Spectrometry, Japan, Formation of Gaseous Ions from Co(acac)2, Co(hfac)2, Ni(acac)2, and Ni(hfac)2 Using ESI, CI, and EI Mass Spectrometry, 12 May 2020, 11 May 2020, 11 May 2020
  • Yoshimi Nakamura; Takae Takeuchi, The 100th Annual Meeting of the Chemical Society of Japan, Theoretical Study on Molecular Structures and Collision Cross Sections of IgG Fc Region Glycopeptide Ions:1. Effects of Glycosylation, Hydroxyl Group and Charge, 23 Mar. 2020, 22 Mar. 2020, 25 Mar. 2020
  • Akira Motoyama; Keishi Kihara; Takae Takeuchi, The 22nd International Conference on Secondary Ion Mass Spectrometry, Desorption Electrospray Ionization-Mass Spectrometry Imaging (DESI-MSI) applied to the Research and Development, 23 Oct. 2019, 20 Oct. 2019, 25 Oct. 2019
  • Takae Takeuchi; Kana Nakamura; Abdulrahman H Basher; Tomoko Ito; Kazuhiro Karahashi; Satoshi Hamaguchi, 12th International Symposium on Atomic Characterizations for New Materials and Devices '19, Quantum mechanical study on reaction mechanisms of gaseous pentane-2,4-dione and (Z)-4-hydroxypent-3-en-2-one on Ni surfaces and NiO surfaces, 21 Oct. 2019, 20 Oct. 2019, 25 Oct. 2019, True
  • Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, The 80th JSAP Autumn Meeting 2019, Organic metal ion beam production for stoichiometric crystalline film formation, 20 Sep. 2019, 18 Sep. 2019, 21 Sep. 2019, The Japan Society of Applied Physics, Hokkaido University, Sapporo, False, url
  • Abdulrahman H. Basher; Marjan Krsti; Takae Takeuchi; Michiro Isobe; Tomoko Ito; Masato Kiuchi; Kazuhiro Karahashi; Wolfgang Wenzel; Satoshi Hamaguchi, The Joint Conference of XXXIV International Conference on Phenomena in Ionized Gases (XXXIV ICPIG) and the 10th International Conference on Reactive Plasmas (ICRP-10), Reaction of hexafluoroacetylacetone on nickel and nickel oxide surfaces and its effects on thermal atomic layer etching (ALE) processes, 13 Jul. 2019, 14 Jul. 2019, 19 Jul. 2019
  • Takae Takeuchi; Yuki Kobayashi; Keishi Kihara; Akira Motoyama, 47th IUPAC World Chemistry Congress (Palais des Congrès, Paris), Ab Initio Study of Reaction Mechanisms for E-Z Isomerization and H2O Elimination in Urocanic Acids with Ion Mobility Mass Spectrometry, 08 Jul. 2019, 07 Jul. 2019, 12 Jul. 2019
  • Ryuichi Arakawa; Hiroshi Adachi; Yoshiya Oda; Yasuo Shida; Katsuaki Shiratsuchi; Takae Takeuchi; Takaaki Nishioka; Atsushi Yamamoto; Yoshinao Wada, The 67th Annual Conference on Mass Spectrometry, Japan (Tsukuba), Official Database of the Mass Spectrometry Society of Japan: MassBank, 17 May 2019, 15 May 2019, 17 May 2019
  • Takae Takeuchi; Chiaki Kata; Tomohiro Akashi, The 67th Annual Conference on Mass Spectrometry, Japan (2019, Tsukuba), Mass Spectrometric Analysis of Volatile Secondary Metabolites in Aspergillus nidulans by the Gene Deletions for Sesquiterpene Biosynthetic Pathway Elucidation, 15 May 2019, 15 May 2019, 17 May 2019
  • Yoshimi Nakamura; Takae Takeuchi, 8th Ion Mobility Symposium, Molecular Structure Analysis of Glycopeptide Ions by Ab Initio Calculations and Ion Mobility Mass Spectrometry, 20 Apr. 2019, 20 Apr. 2019, 20 Apr. 2019
  • Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, The 35th Annual Meeting of the Japan Society of Plasma Science and Nuclear Fusion Research, Organometallic ion beam formation using fragment ions of organosilicon compounds and its stoichiometric crystal growth, 06 Dec. 2018, 03 Dec. 2018, 06 Dec. 2018
  • Akira Motoyama; Takae Takeuchi, Waters Users Forum 2018, Direct analysis of skin molecules by DESI-IM-MS and CCS interpretation, 23 Oct. 2018, 23 Oct. 2018, 25 Oct. 2018
  • Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, The 79th JSAP Autumn Meeting, 2018, Low-Energy Silicon Molecular Ion Beam Produced from Hexamethyldisilazane, 20 Sep. 2018, 18 Sep. 2018, 21 Sep. 2018
  • Ryuichi Arakawa; Hiroshi Adachi; Yasuo Shida; Katsuaki Shiratsuchi; Takae Takeuchi; Takaaki Nishioka; Yoshinao Wada, 66th Annual Conference on Mass Spectrometry (2018, Osaka), Proposal: Recommendation on Measuring and Providing Mass Spectra as Chemical Information of Organic Molecules, 17 May 2018, 15 May 2018, 18 May 2018
  • Takae Takeuchi; Yuki Kobayashi; Keishi Kihara; Akira Motoyama, Mass Spectrometry and Proteomics 2018 (MSP2018) 9th Asia-Oceania Human Proteome Organization (AOHUPO) Conference, Ab Initio DFT Study on the Gas-Phase Structures and Isomerization Mechanism of Cis-Trans Isomers Using Ion Mobility Mass Spectrometer, 16 May 2018, 15 May 2018, 18 May 2018
  • Yuki Kobayashi; Keishi Kihara; Akira Motoyama: Takae Takeuchi, The 98th CSJ Annual Meeting, Theoretical study of driftgrams in Ion Mobility Mass Spectrometry. I. Collision Cross-Sections of Cis/Trans Isomeric Ions, 21 Mar. 2018, 20 Mar. 2018, 23 Mar. 2018
  • Chiaki Kata; Tomohiro Akashi; Tomoko Kimura; Takae Takeuchi, The 98th CSJ Annual Meeting, Analysis of Secondary Metabolites from Aspergillus nidulans Using GC/MS VII. Effects of AN3275 Gene Deletion, 21 Mar. 2018, 20 Mar. 2018, 23 Mar. 2018
  • Satoru Yoshimura; Satoshi Sugimoto; Takae Takeuchi; Kensuke Murai; Masato Kiuchi, The 65th JSAP Spring Meeting, 2018, Low-Energy Silicon Molecular Ion Beam Production for SiO Film Formation, 17 Mar. 2018, 17 Mar. 2018, 20 Mar. 2018
  • Yuri Tanaka; Tohru Yamagaki; Motoshi Sakakura; Takae Takeuchi, The 68th Workshop on Fundamentals, Ionization and Ion Chemistry in Mass Spectrometry, Real-time monitoring of the volatile metabolites emitted from the soil-delived fungi II., 23 Apr. 2017, 23 Apr. 2017, 23 Apr. 2017
  • Yuri Tanaka; Tohru Yamagaki; Motoshi Sakakura; Takae Takeuchi, The 97th CSJ Annual Meeting, 2017, Real Time Monitoring of Microbial Volatile Metabolites of Soil-derived Fungi via Ambient Ionization Mass Spectrometry I. P. paneum, F. solani, A. fumigatus and A. nidulans, 16 Mar. 2017, 16 Mar. 2017, 19 Mar. 2017
  • Takae Takeuchi, The 67th Workshop on Fundamentals, Ionization and Ion Chemistry in Mass Spectrometry / The 156th Kansai-area Colloquium, Theoretical Studies on Fragmentation Mechanisms in Mass Spectra - Theoretical Approaches, 21 Jan. 2017, 21 Jan. 2017, 21 Jan. 2017
  • 第6回イオン移動度研究会, 糖ペプチドのイオンモビリティー質量分析法 P16, 2017
  • 第157回質量分析関西談話会, セスキテルペン生成関連遺伝子 ノックアウト真菌Aspergillus nidulansの揮発性代謝物質の解析, 2017
  • 第65回質量分析総合討論会, 土壌由来真菌のカビ臭診断ソフトウェアの開発と大気圧イオン移動度ドリフト時間の予測, 2017
  • 第78回応用物理学会秋季学術講演会, 低エネルギー有機ケイ素イオンビームの生成とSiC等成膜への応用, 2017
  • 第20回日本水環境学会シンポジウム, セスキテルペン合成遺伝子変異株によるAspergillus nidulansの揮発性代謝物質の質量分析Ⅳ. LO8910株, LO9253株 MS20-P-01, 2017
  • The 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '17 (ALC'17), Ambient Mass Spectrometry for Monitoring Microbial Volatile Metabolites from Soil-derived Fungi Using a DART Ion Source(4p-P-56), 2017
  • The 67th Workshop on Fundamentals, Ionization and Ion Chemistry in Mass Spectrometry / The 156th Kansai-area Colloquium (Kyoto, 21 January, 2017), Theoretical Studies on Fragmentation Mechanisms in Mass Spectra, 2017
  • The 97th CSJ Annual Meeting 1PB-130, Real Time Monitoring of Microbial Volatile Metabolites of Soil-derived Fungi via Ambient Ionization Mass Spectrometry I. P. paneum, F. solani, A. fumigatus and A. nidulans, 2017
  • Joint Symposium of Ion Mobility and Mass Spectrometry, Real Time Monitoring of Microbial Volatile Metabolites of Soil-derived Fungi II., 2017
  • The 6th Ion Mobility Symposium, Ion Mibility Mass Spectrometry in Glycopeptides, 2017
  • Joint Symposium of Ion Mobility and Mass Spectrometry, Analysis of Volatile Metabolites from A Gene Deletion Strain of A. nidulans, 2017
  • The 65th Annual Conference on Mass Spectrometry, Japan, Development of Software, MVOC Finder, as a Diagnostic Tool to Identify Solid-Derived Fungal Species and to Predict an IMS Drift Time under Atmospheric Pressure, 2017
  • The 78th JSAP Autumn Meeting, 2017, Low-Energy Organic Silicon Molecular Ion Beam Production for SiC Film Formation, 2017
  • 20th Symposium of Japan Society on Water Environment, GCMS Analysis of Volatile Metabolites from Aspergillus nidulans V. LO8910 and LO9253 Strains, 2017
  • The 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '17 (ALC'17), Ambient Mass Spectrometry for Monitoring Microbial Volatile Metabolites from Soil-derived Fungi Using a DART Ion Source, 2017
  • 日本化学会第96春季年会, o-ジクロロフェニルラジカルからのPCB異性体の生成機構に関する量子化学的研究(1PB-021 ), 2016
  • 日本化学会第96春季年会, ヒンダードアミン系光安定剤のESI MS/MSスペクトルにおけるフラグメンテーション機構の量子化学的研究(2B3-31), 2016
  • 日本化学会第96春季年会, セサミン、エピセサミン、ジアセサミンのイオンモビリティー質量スペクトル解析に関する理論的研究(3C1-42), 2016
  • 日本化学会第96春季年会, Aspergillus nidulansの二次代謝物のGC/MSおよびLC/MS/MS分 析とセスキテルペン生成関連遺伝子の探索 IV.AN3280遺伝子(3PB-229), 2016
  • 第5回イオン移動度研究会, イオンモビリティー質量スペクトルと理論計算によるセサミン類の構造解析~理論的アプローチ, 2016
  • 第64回質量分析総合討論会(2016), フラボノイド配糖体負イオンのイオンモビリティーMSによるイオン種解析 (2P-38), 2016
  • 第64回質量分析総合討論会(2016), Aspergillus nidulansの二次代謝物のGC/MSおよびLC/MS/MS分析とセスキテルペン生成関連遺伝子の探索 V. LO8910およびLO8925株(2C-O1-0920), 2016
  • 第64回質量分析総合討論会(2016), Ion-mobility MSと量子化学計算によるセサミン類構造異性体のコンフォマー解析(2C-O1-1020), 2016
  • 第64回質量分析総合討論会(2016), フェノール性化合物 Dihydroxybenzoic acid (DHB) 構造異性体の量子化学計算による水素ラジカル脱離メカニズムの解析(2P-06), 2016
  • 第10回PCB講演会, PCB構造異性体生成過程の理論的研究, 2016
  • The 9th International PCB Workshop, Ab initio Study of Reaction Mechanisms for Formation of PCB Isomers With o-Dichlorophenyl Radicals, 2016
  • サントリー生命科学財団 生物有機科学研究所シンポジウム, 文化財保全環境モニター開発―土壌由来のカビの検出イオンモビリティースペクトロメトリー(招待講演), 2016
  • The 96th CSJ Annual Meeting, Ab Initio Study on Reaction Mechanisms of PCB Formation from o-Dichlorophenyl Radicals, 2016
  • The 96th CSJ Annual Meeting, Ab Initio Study on Fragmentation Mechanisms in ESI MS/MS Spectra of a Hindered Amine Light Stabilizer, 2016
  • The 96th CSJ Annual Meeting, Theoretical Study of Collision Cross Section of Li+ or Na+ adducts of Sesamin, Episesamin and Diasesamin Using Ion Mobility Mass Spectrometry, 2016
  • The 96th CSJ Annual Meeting, Analysis of Secondary Metabolites from A. nidulans Using GC/MS and LC/MS IV. The AN3280 Gene, 2016
  • The 5th Ion Mobility Symposium, イオンモビリティー質量スペクトルと理論計算によるセサミン類の構造解析~理論的アプローチ, 2016
  • 64th Annual Conference on Mass Spectrometry (2016), Negative ion species analysis of flavonoid glycosides with ion mobility mass spectrometr, 2016
  • 64th Annual Conference on Mass Spectrometry (2016), Analysis of Secondary Metabolites from A. nidulans Using GC/MS and LC/MS/MS V. AN3280 Gene Expression-enforced Strains: LO8910 and LO8925, 2016
  • 64th Annual Conference on Mass Spectrometry (2016), Conformation Analysis of Sesamin Isomers with Ion-mobility MS and Quantum calculation, 2016
  • 64th Annual Conference on Mass Spectrometry (2016), Mechanism of Hydrogen Radical Removing from Phenolic Compounds of Six Dihydroxy Benzoic Acids with Quantum Chemical Calculation, 2016
  • 第10回PCB講演会, Theoretical studies on the productions of PCB isomers, 2016
  • The 9th International PCB Workshop, Ab initio Study of Reaction Mechanisms for Formation of PCB Isomers With o-Dichlorophenyl Radicals, 2016
  • サントリー生命科学財団 生物有機科学研究所シンポジウム, Determination of solid-derived fungal species by ion mobility spectrometric analysis of microbial volatile organic compounds for conservation technology of cultural heritage, 2016
  • Takae Takeuchi; Yoshitaka Nakamura; Toshiki Sugai; Tomohiro Akashi; Masato Kiuchi; Takahito Suzuki; Yoshiaki Aoki; Ayuko Tachibana; Hitoshi Fujimiya, JSPS Microbeam Analysis 141st Committee 159th Symposium, Open Source Software, MVOC Finder, as a Diagnostic Tool to Identify Soil-Derived Fungal Species with Ion Mobility and GC-MS Spectral Database of Microbial Volatile Organic Compounds (MVOC), 20 Feb. 2015
  • 日本化学会第95春季年会(2015), フラボノイド配糖体のイオンモビリティー質量スペクトル解析に関する理論的研究I. ケンペロール- 3-O-グルコシド、ケンペロール-3-O-ルチノシド、ケルセチン-3-O-グルコシド、ケルセチン-3-O-ルチノシド(2PA-152), 2015
  • 日本化学会第95春季年会(2015), リン酸化ペプチドのプロトン付加分子のOn-Resonance励起衝突解離機構の量子化学的研究 VI.単分子分解反応速度の計算(3PA-075), 2015
  • 第4回イオン移動度研究会, フラボノイド配糖体のイオンモビリティー質量スペクトル解析に関する理論的研究II., 2015
  • 第63回質量分析総合討論会,2015,つくば, ヒンダードアミン系光安定剤のMALDIマススペクトルにおけるフラグメンテーション機構の量子化学的研究 I. コハク酸ジメチルと4-ヒドロキシ-2,2,6,6-テトラメチル-1-ピペリジンエタノールの重縮合物 (1D-O2-1800), 2015
  • 第63回質量分析総合討論会,2015,つくば, 金属-ペプチド複合体を用いた電子移動解離質量分析法の本質解明に向けたアプローチ(1D-O2-1820), 2015
  • 第63回質量分析総合討論会,2015,つくば, 糖ペプチドのイオンモビリティ―質量分析法, 2015
  • 一般社団法人日本鉄鋼協会 材料の組織と特性部会 自主フォーラム「鉄鋼材料の生物劣化を誘導する影響因子の解明」第1回研究会, 揮発性有機化合物によるカビ検出システム(招待講演), 2015
  • 45th IUPAC World Chemistry Congress, Generation of Multiple-Bonded Silicon-Containing Ions Using Tandem Mass Spectrometry, 2015
  • 35th International Symposium on Halogenated Persistent Organic Pollutants (DIOXIN2015), THEORETICAL PREDICTION OF PCB CONGENER-DISTRIBUTION PATTERNS IN PIGMENT MANUFACTURING PROCESS, 2015
  • International Chemical Congress of Pacific Basin Societies (Pacifichem 2015 Congress), Determination of soil-derived fungal species by ion mobility spectrometric analysis of microbial volatile organic compounds for conservation technology of cultural heritage (招待講演), 2015
  • Pacifichem 2015 Congress, Positive and Sustainable Action for Gender Equality at Nara Women’s University, 2015
  • The 95th CSJ Annual Meeting (2015), Ab Initio Study on Ion Mobility Mass Spectra of Flavonoid Glycosides I. Kaempferol 3-O-Glucoside, Kaempferol 3-O-Rutinoside, Quercetine 3-O-Glucoside and Quercetine 3-O-Rutinoside, 2015
  • The 95th CSJ Annual Meeting (2015), Ab initio Study on Mechanisms of On-Resonance Excitation Collision Induced Dissociation of Protonated Phosphopeptides VI. RRKM Calculation of Rate Constants of Unimolecular Decomposition, 2015
  • 第4回イオン移動度研究会, フラボノイド配糖体のイオンモビリティー質量スペクトル解析に関する理論的研究II., 2015
  • 63rd Annual Conference on Mass Spectrometry, Japan, Ab Initio Study on Fragmentation Mechanism in MALDI Mass Spectra of Hindered Amine Light Stabilizer I. Dimethyl Succinate Polymer with 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, 2015
  • 63rd Annual Conference on Mass Spectrometry, Japan, Where Does Electron Go in Metal-Peptide Complex? An Approach to Address the General Mechanism of Electron Transfer Mass Spectrometry, 2015
  • 63rd Annual Conference on Mass Spectrometry, Japan, Ion mobility mass spectrometry of glycopeptides, 2015
  • 一般社団法人日本鉄鋼協会 材料の組織と特性部会 自主フォーラム「鉄鋼材料の生物劣化を誘導する影響因子の解明」第1回研究会, 揮発性有機化合物によるカビ検出システム, 2015
  • 45th IUPAC World Chemistry Congress, Generation of Multiple-Bonded Silicon-Containing Ions Using Tandem Mass Spectrometry, 2015
  • 35th International Symposium on Halogenated Persistent Organic Pollutants (DIOXIN2015), THEORETICAL PREDICTION OF PCB CONGENER-DISTRIBUTION PATTERNS IN PIGMENT MANUFACTURING PROCESS, 2015
  • International Chemical Congress of Pacific Basin Societies (Pacifichem 2015 Congress), Determination of soil-derived fungal species by ion mobility spectrometric analysis of microbial volatile organic compounds for conservation technology of cultural heritage (Invited), 2015
  • 2015 International Chemical Congress of Pacific Basin Societies (Pacifichem 2015 Congress), Positive and Sustainable Action for Gender Equality at Nara Women’s University, 2015
  • Takae Takeuchi, 鳥取大学ポストグローバルCOE公開シンポジウム 科博 きのこの香りを科学する ― 菌類の揮発性物質の機能、役割とその利用 ―, ニオイで菌を探る:文化財環境における真菌検出システムの開発(Invited), 2014
  • 日本化学会第94春季年会(1PA-101), Aspergillus nidulansの揮発性代謝物のGC/MS分析とセスキテルペン生成関連遺伝子の探索II.セスキテルペンの構造解析, 2014
  • 日本化学会第94春季年会, リン酸化ペプチドプロトン付加分子のOn-Resonance励起衝突誘起解離機構の理論的研究 Ⅴ. Ab initio 法によるTRDIYETDpYYRKプロトン付加分子からのH3PO4脱離機構(1PA067), 2014
  • 旭化成株式会社 基盤技術研究所 第85回イブニングセミナー, 質量スペクトル解析における基礎理論と文化財保存への応用, 2014
  • 第3回イオン移動度研究会, 揮発性代謝物質のイオンモビリティーによる汚染微生物の検出ソフトウェアの開発, 2014
  • 第62回質量分析総合討論会, 糖ペプチドのイオンモビリティー質量分析と分子力学法を用いたコンフォメーション探索(1B-O1-1520), 2014
  • 第62回質量分析総合討論会, Aspergillus nidulansの揮発性代謝物のGC/MS分析とセスキテルペン生成関連遺伝子の探索III(2P-24), 2014
  • 第62回質量分析総合討論会, 金属–ペプチドコンプレックス形成が電子移動解離に与える影響(2C-O1-0940 ), 2014
  • 5th International Conference on Plasma Medicine (ICPM5), Atmospheric Chemical Reaction by Air Activation Apparatus Using Corona Discharge and UV Lamp, 2014
  • 理研シンポジウム:物質構造解析2014:MSとNMRの基礎と実践, 質量スペクトル解析における基礎理論と文化財保存への応用, 2014
  • 5th Asia Oceania Mass Spectrometry Conference(5th AOMSC)(Invited), Can GC-MS and IMS data of MVOCs identify fungal species? Development of a software for conserving cultural heritage sites (Invied), 2014
  • 5th Asia Oceania Mass Spectrometry Conference(5th AOMSC), Mass Spectrometric Study on Air Activation Apparatus Using Corona Discharge and UV Lamp, 2014
  • 20th International Mass Spectrometry Conference, Geneva, Switzerland, August 24-29, 2014, Structure and energy dependent ion isomerizations of folates detected using ‘ER-IMS/MSn', 2014
  • 20th International Mass Spectrometry Conference, Geneva, Switzerland, August 24-29, 2014, Ion mobility spectrometry and MM conformational search of glycopeptides, 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Development of Software for Identifying Soil-derived Fungal Species with PLS Analysis of SPME GC/MS and IMS Data of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Properties, 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Formation of isomeric ions in collision-induced dissociation process probed by energy-resolved ion mobility tandem mass spectrometry (ER-IMS/MS2), 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Dispersion of olive oil in aqueous fine bubble, 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, ファインバブルに分散したオリーブオイルの質量分析, 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, 土壌由来カビから放出される揮発性有機化合物のIMSおよびGCMSデータの多変量解析II(MS17_P02), 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, 土壌由来真菌P. paneumの揮発性代謝物のSPME/GC/MS分析-生育温度および培地による効果, 2014
  • 第58回日本医真菌学会総会・学術集会, 医真菌Aspergillus fumigatusとFusarium solaniに見られる揮発性有機化合物による自己増殖抑制と多感作用, 2014
  • 7th International Symposium on Surface Science (ISSS-7), Dispersion of Organic Compounds in Water with Ultrafine Bubbles (3PN-72), 2014
  • 一般社団法人日本マイクロ・ナノバブル学会第3回学術総会, 有機化合物のウルトラファインバブル水への溶解I-炭化水素および脂肪酸-, 2014
  • (公社)日本分析化学会ガスクロマトグラフィー研究懇談会 第334回ガスクロマトグラフィー研究会特別講演会, ニオイ分析による文化財保存のためのカビ種推定ソフトウェア研究(招待講演), 2014
  • 鳥取大学ポストグローバルCOE公開シンポジウム 科博 きのこの香りを科学する ― 菌類の揮発性物質の機能、役割とその利用 ―, ニオイで菌を探る:文化財環境における真菌検出システムの開発, 2014
  • 日本化学会第94春季年会, Gene analysis of volatile organic compound production in Aspergillus nidulans II. structure analysis of sesquiterpene, 2014
  • The 94th Annual Conference ofThe Chemical Society of Japan, Ab Initio Study on Mechanisms of On-Resonance Excitation Collision Induced Dissociation of Protonated Phosphopeptides V. Fragmentation mechanism of H3PO4 loss from [TRDIYETDpYYRK]H+, 2014
  • 旭化成株式会社 基盤技術研究所 第85回イブニングセミナー, 質量スペクトル解析における基礎理論と文化財保存への応用, 2014
  • 第3回イオン移動度研究会, Development of detection technique (software) of fungi by ion mobility of MVOCs, 2014
  • 62nd Annual Conference on Mass Spectrometry, Ion mobility mass spectrometry and MM conformational search of glycopeptides, 2014
  • 62nd Anual Conference on Mass Spectrometry, Osaka, 2014, Gene analysis of volatile organic compound production in Aspergillus nidulans III(2P-24 ), 2014
  • 62nd Annual Conference on Mass Spectrometry, Influence of Metal-Peptide Complexation on Fragmentation and Inter-Fragment Hydrogen Migration in Electron Transfer Dissociation, 2014
  • 5th International Conference on Plasma Medicine (ICPM5), Atmospheric Chemical Reaction by Air Activation Apparatus Using Corona Discharge and UV Lamp, 2014
  • 理研シンポジウム:物質構造解析2014:MSとNMRの基礎と実践, 質量スペクトル解析における基礎理論と文化財保存への応用, 2014
  • 5th Asia Oceania Mass Spectrometry Conference(5th AOMSC)(Invited), Can GC-MS and IMS data of MVOCs identify fungal species? Development of a software for conserving cultural heritage sites (Invited), 2014
  • 5th Asia Oceania Mass Spectrometry Conference(5th AOMSC), Mass Spectrometric Study on Air Activation Apparatus Using Corona Discharge and UV Lamp, 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Structure and energy dependent ion isomerizations of folates detected using ‘ER-IMS/MSn', 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Ion mobility spectrometry and MM conformational search of glycopeptides, 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Development of Software for Identifying Soil-derived Fungal Species with PLS Analysis of SPME GC/MS and IMS Data of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Properties, 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Formation of isomeric ions in collision-induced dissociation process probed by energy-resolved ion mobility tandem mass spectrometry (ER-IMS/MS2), 2014
  • 20th International Mass Spectrometry Conference (20th IMSC), Dispersion of olive oil in aqueous fine bubbles, 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, ファインバブルに分散したオリーブオイルの質量分析, 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, Partial Least Squares Regression Analysis of IMS and GCMS data of Microbial Volatile Organic Compounds Emitted by Soil-derived Fungi II, 2014
  • 第17回日本水環境学会シンポジウム 最新のMS技術から広がる環境分析の世界, SPME/GC/MS Analysis of Microbial Volatile Organic Compounds Emitted by the Solid-derived Fungus P. paneum-Effects on Incubation Temperature and Culture Media, 2014
  • 第58回日本医真菌学会総会・学術集会, 医真菌Aspergillus fumigatusとFusarium solaniに見られる揮発性有機化合物による自己増殖抑制と多感作用, 2014
  • 7th International Symposium on Surface Science (ISSS-7), Dispersion of Organic Compounds in Water with Ultrafine Bubbles(3PN-72), 2014
  • The 3rd Annual meeting of the MNBSCJ, 有機化合物のウルトラファインバブル水への溶解I-炭化水素および脂肪酸-, 2014
  • (公社)日本分析化学会ガスクロマトグラフィー研究懇談会 第334回ガスクロマトグラフィー研究会特別講演会」, Software for Identifying Soil-derived Fungal Species Based on GC/MS and IMS Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Properties(招待講演), 2014
  • Takae Takeuchi; Sayaka Tsuri; Tomoko Kimura; Takahito Suzuki; Youko Kiuchi; Berl R. Oakley; Tomoiro Akashi, 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, Gene Analysis of Volatile Organic Compound Production in Aspergillus nidulans I. GC/MS Analysis of Knocked-out Strains and Expression-enforced Strains of Genes Related to Sesquiterpene Biosynthesis, 12 Sep. 2013, 10 Sep. 2013, 12 Sep. 2013
  • 24th Australian and New Zealand Society for Mass Spectrometry, Energy-resolved Ion Mobility Tandem Mass Spectrometry - A New Way for Characterizing Isomeric Ions Formed in Fragmentation Processes (WedAM-04), 2013
  • 第60回イオン反応研究会・第139回質量分析関西談話会「質量分析学 基礎の理解から応用への発展」, マススペクトルのフラグメンテーション解析の理論的研究とデータベース解析ソフトウェアの開発, 2013
  • 日本化学会第93春季年会(2G1-16), カビ臭の質量分析およびイオンモビリティ分析によるカビ種推定ソフトウェアの開発, 2013
  • 第4回プラズマの建築利用研究会, 文化財保全のためのカビのセンシング, 2013
  • 第2回イオン移動度研究会(招待講演), 文化財保存のための環境モニターシステムの開発~カビ臭質量スペクトルおよびイオンモビリティデータベースとカビ種推定ソフトウェア"MVOC Finder”~(招待講演), 2013
  • 61st ASMS Conference on Mass Spectrometry and Allied Topics, June 9 - 13, 2013, Minneapolis, MN, USA, Development of Software for Detecting and Identifying Fungal Species Using GC/MS, LC/MS and IMS Data of Microbial Volatile Organic Compounds, 2013
  • 44th IUPAC World Chemistry Congress, Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Heritage: Development of Software for Fungal Species Identification, 2013
  • 第61回質量分析総合討論会 2013 つくば, SPME/GC/MS法による貧栄養の水環境に生育する細菌由来揮発性有機化合物(MVOC)の同定I. Brevundimonas vesicularis, Pseudomonas fluorescensおよびSphingomonas paucimobilis (2P-23), 2013
  • 第61回質量分析総合討論会 2013 つくば, イオンモビリティー分離質量分析法およびMS/MS断片化によるフラボノイド配糖体異性体のキャラクタリゼーション(2P35), 2013
  • 第61回質量分析総合討論会 つくば 2013, 糖ペプチドのイオンモビリティー質量分析と分子力学法を用いたコンフォメーション探索(2C-O2-0950), 2013
  • 第61回質量分析総合討論会 つくば 2013, リン酸化ペプチドプロトン付加分子のOn-Resonance励起衝突誘起解離機構の理論的研究IV. Ab initioポテンシャルエネルギー曲面と内部エネルギー分布 (2P-12), 2013
  • 第61回質量分析総合討論会 2013 つくば, 日本質量分析学会創立60周年記念討論会 質量分析60年の変遷をたどる(2A-AN2-1615), 2013
  • 第5回LC/MSワークショップ(招待講演), フラグメンテーション機構の研究: On-およびOff-Resonance CID(招待講演), 2013
  • 第16回日本水環境学会シンポジウム, 土壌由来カビ分析におけるMS技術の新展開〜揮発性代謝物MVOCのプロファイル解析〜, 2013
  • 第16回日本水環境学会シンポジウム, 揮発性有機化合物に注目した貧栄養の水環境に生育する細菌に関する研究, 2013
  • Workshop on Strategic Japanese-Croatian Cooperative Program, Fungal Odor Detection Technique and Software for Identifying Fungal Species: Analysis of Microbial Volatile Organic Compounds (MVOCs) by SPME-GC/MS and IMS for Conservation Technology of Cultural Properties (招待講演), 2013
  • 9th International Symposium on Atomic Level Characterizations for New Materials and Devices ’13 (ALC’13), Development of a Combined SPME-IMS System and the Software for Detecting and Identifying Fungal Species, 2013
  • 5th JCS International Symposium on Theoretical Chemistry, Ion mobility mass spectrometry and MM conformational search of glycopeptides (Invited), 2013
  • 24th Australian and New Zealand Society for Mass Spectrometry, Energy-resolved Ion Mobility Tandem Mass Spectrometry - A New Way for Characterizing Isomeric Ions Formed in Fragmentation Processes (WedAM-04), 2013
  • 第60回イオン反応研究会・第139回質量分析関西談話会「質量分析学 基礎の理解から応用への発展」, マススペクトルのフラグメンテーション解析の理論的研究とデータベース解析ソフトウェアの開発, 2013
  • The 93rd Annual Meeting of the Chemical Society of Japan, Development of Software for Fungal Species Identification Based on Multivariate Statistical Analysis of IMS and GC/MS Data: Fungal Odor Detection Techniques in Early Growth Stages, 2013
  • 第4回プラズマの建築利用研究会, 文化財保全のためのカビのセンシング, 2013
  • 第2回イオン移動度研究会 招待講演, 文化財保存のための環境モニターシステムの開発~カビ臭質量スペクトルおよびイオンモビリティデータベースとカビ種推定ソフトウェア"MVOC Finder”~, 2013
  • 61st ASMS Conference on Mass Spectrometry and Allied Topics, June 9 - 13, 2013, Minneapolis, MN, USA, Development of Software for Detecting and Identifying Fungal Species Using GC/MS, LC/MS and IMS Data of Microbial Volatile Organic Compounds, 2013
  • 44th IUPAC World Chemistry Congress, Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Heritage: Development of Software for Fungal Species Identification, 2013
  • 61st Annual Conference on Mass Spectrometry, Osaka, Japan, 2013, Measurement of Microbial Volatile Organic Compounds (MVOCs) Emitted by Oligotrophic Bacteria Derived from Water Environments Using SPME/GC/MS I. Brevundimonas vesicularis, Pseudomonas fluorescens and Sphingomonas paucimobilis, 2013
  • 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, Characterization of flavonoid mono-glycoside isomers using ion mobility separation mass spectrometry and MS/MS fragmentation, 2013
  • 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, Ion mobility mass spectrometry and MM conformational search of glycopeptides, 2013
  • 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, Ab Initio Study on Mechanisms of On-Resonance Excitation Collision Induced Dissociation of Protonated Phosphopeptides IV. Potential Energy Curves and Internal Energy Distribution, 2013
  • 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, 日本質量分析学会創立60周年記念討論会 質量分析60年の変遷をたどる(2A-AN2-1615), 2013
  • 61st Annual Conference on Mass Spectrometry, Tsukuba, Japan, 2013, Gene Analysis of Volatile Organic Compound Production in Aspergillus nidulans I. GC/MS Analysis of Knocked-out Strains and Expression-enforced Strains of Genes Related to Sesquiterpene Biosynthesis(3C-O3-1010), 2013
  • 5th LC/MS Workshop, "Fragmentation Mechanisms in On- and Off-Resonance CID" (Invited), 2013
  • The 16th JSWE Symposium, 土壌由来カビ分析におけるMS技術の新展開〜揮発性代謝物MVOCのプロファイル解析〜, 2013
  • The 16th JSWE Symposium, Studies on the Oligotrophic Bacteria in the Aquatic Environments Focusing on their MVOCs, 2013
  • Workshop on Strategic Japanese-Croatian Cooperative Program, Fungal Odor Detection Technique and Software for Identifying Fungal Species: Analysis of Microbial Volatile Organic Compounds (MVOCs) by SPME-GC/MS and IMS for Conservation Technology of Cultural Properties (Invited), 2013
  • 9th International Symposium on Atomic Level Characterizations for New Materials and Devices ’13 (ALC’13), Development of a Combined SPME-IMS System and the Software for Detecting and Identifying Fungal Species, 2013
  • 5th JCS International Symposium on Theoretical Chemistry, Ion mobility mass spectrometry and MM conformational search of glycopeptides (Invited), 2013
  • 8th EU-Japan Joint Symposiumon Plasma Processing (JSPP2012), Mass Spectrometric Studies of Unimolecular Fragmentation of 2-(1-Adamantyl)-4-(tert-butyl)-2-trimethylsiloxy-1,1-bis(trimethylsilyl)-1-silacyclobut-3-ene, 2012
  • 日本化学会第92春季年会 2PB-085, イオンモビリティースペクトロメトリーと質量分析法による土壌由来カビ代謝物の分析, 2012
  • 60th ASMS Conference on Mass Spectrometry and Allied Topics, May 20 - 24, 2012, Vancouver Convention Centre, Vancouver, BC, Canada, The Effect of Incubation Temperature on Microbial Volatile Organic Compounds Emitted by Aspergillus fumigatus and Penicillium paneum, 2012
  • 60th ASMS Conference on Mass Spectrometry and Allied Topics, May 20 - 24, 2012, Vancouver Convention Centre, Vancouver, BC, Canada, Ab initio DFT Study on the Fragmentation Mechanism of Proton Adducts of Phosphorylated Tetrapeptide in Collision-Induced Dissociations, 2012
  • 18th Congress of the International Society for Human and Animal Mycology 2012 (ISHAM 2012) Berlin, June 11-15, 2012, Allelochemical function of microbial organic compounds produced by Fusarium solani (P280), 2012
  • JSPS Bilateral Progmam: Japan-Hungary Joint Seminar "Chemical and Ecological Research on The Microorganisms for Preserving Cultural Properties", Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Heritage, 2012
  • 日本学術会議(化学委員会・分析化学分科会)講演会 夏期の高校生対象講演会「ここめでわかる!分析化学のすごさとおもしろさ」, 文化財の環境分析:かびの臭いが決め手, 2012
  • 19th International Mass Spectrometry Conference (S32-0940), Ab initio MO Study on the Fragmentation Mechanisms of Protonated Phosphopeptides in "On-Resonance" and "Off- Resonance" Pulsed Gas Introduction Collision-Induced Dissociations (S32-0940), 2012
  • 19th International Mass Spectrometry Conference, Energy-resolved ion-mobility tandem mass spectrometry: a new tool for probing gas-phase isomerization and fragmentation of small molecules (PTh-081), 2012
  • 19th International Mass Spectrometry Conference, Analysis of Metabolites emitted by Soil-Derived Fungi using Ion Mobility Spectrometry based on GC/MS Data Analysis (PTh-143), 2012
  • 19th International Mass Spectrometry Conference, Energy-resolved ion mobility tandem mass spectrometry: A new approach for probing fragmentation pathways involving ion isomerization (S36-1620), 2012
  • マイクロビームアナリシス第141委員会 第150回研究会, カビ臭分析によるカビ種推定ソフトウェアの開発:文化財保全への応用, 2012
  • 第36回文化財の保存および修復に関する国際研究集会 「文化財の微生物劣化とその対策 屋外・屋内環境、および被災文化財の微生物劣化とその調査・対策に関するの最近のトピック」, 文化財保全のためのカビ臭分析:カビの早期発見のためのニオイ検出技術とカビ種推定ソフトウェア, 2012
  • 8th EU-Japan Joint Symposiumon Plasma Processing (JSPP2012), Mass Spectrometric Studies of Unimolecular Fragmentation of 2-(1-Adamantyl)-4-(tert-butyl)-2-trimethylsiloxy-1,1-bis(trimethylsilyl)-1-silacyclobut-3-ene, 2012
  • 92th Annual Spring Conference of the Chemical Society of Japan, Analysis of Metabolites Emitted by Soil-Derived Fungi Using GC/MS, LC/MS and Ion Mobility Spectrometry, 2012
  • 60th ASMS Conference on Mass Spectrometry and Allied Topics, May 20 - 24, 2012, Vancouver Convention Centre, Vancouver, BC, Canada, The Effect of Incubation Temperature on Microbial Volatile Organic Compounds Emitted by Aspergillus fumigatus and Penicillium paneum, 2012
  • 60th ASMS Conference on Mass Spectrometry and Allied Topics, May 20 - 24, 2012, Vancouver Convention Centre, Vancouver, BC, Canada, Ab initio DFT Study on the Fragmentation Mechanism of Proton Adducts of Phosphorylated Tetrapeptide in Collision-Induced Dissociations, 2012
  • 18th Congress of the International Society for Human and Animal Mycology 2012 (ISHAM 2012) Berlin, June 11-15, 2012, Allelochemical function of microbial organic compounds produced by Fusarium solani (P280), 2012
  • JSPS Bilateral Progmam: Japan-Hungary Joint Seminar "Chemical and Ecological Research on The Microorganisms for Preserving Cultural Properties", Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Heritage, 2012
  • Symposium of Science Council of Japan, 文化財の環境分析:かびの臭いが決め手, 2012
  • 19th International Mass Spectrometry Conference, Ab initio MO Study on the Fragmentation Mechanisms of Protonated Phosphopeptides in "On-Resonance" and "Off- Resonance" Pulsed Gas Introduction Collision-Induced Dissociations (S32-0940), 2012
  • 19th International Mass Spectrometry Conference, Energy-resolved ion-mobility tandem mass spectrometry: a new tool for probing gas-phase isomerization and fragmentation of small molecules (PTh-081), 2012
  • 19th International Mass Spectrometry Conference, Analysis of Metabolites emitted by Soil-Derived Fungi using Ion Mobility Spectrometry based on GC/MS Data Analysis (PTh-143), 2012
  • 19th International Mass Spectrometry Conference, Energy-resolved ion mobility tandem mass spectrometry: A new approach for probing fragmentation pathways involving ion isomerization (S36-1620), 2012
  • マイクロビームアナリシス第141委員会 第150回研究会, Development of Software for Fungal Species Identification Based on Multivariate Statistical Analysis of IMS and GC/MS Data―Fungal Odor Detection Techniques in Early Growth Stages―, 2012
  • 36th International Symposium on the Conservation and Restoration of Cultural Property 2012 – Microbial Biodeterioration of Cultural Property, Analysis of Microbial Volatile Organic Compounds for Conservation Technology of Cultural Heritage: Fungal Odor Detection Technique in Early Growth Stages and Software for Fungal Species Estimation (P-9), 2012
  • 日本化学会第91春季年会(2011), 「微生物由来揮発性有機化合物の固相マイクロ抽出ガスクロマトグラフィー質量分析による真菌類のキャラクタリゼーション」, 2011
  • 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '11(ALC'11), Characterization of the Soil-Derived Fungi Based on Mass Spectrometric Analysis of Their Microbial Volatile Organic Compounds, 2011
  • 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '11(ALC'11), Differences in Fragmentation Mechanisms of Protonated Molecules and Molecular Radical Cations from Organometallic Compounds with Si-Si, Ge-Ge and Si-Ge Bonds, 2011
  • 59th ASMS Conference on Mass Spectrometry and Allied Topics MP362, Analysis of Volatile Metabolites Emitted by Soil Fungi Using Head Space Solid-Phase Microextraction GC/MS and Ion Mobility Spectrometry, 2011
  • 質量分析計ユーザーズフォーラム2011(招待講演), 文化財保全環境モニター装置開発のための微生物由来揮発性代謝物MVOCの分析(招待講演), 2011
  • 国際微生物学連合2011会議(IUMS2011 Congress) International Union of Microbiological Societies 2011 Congress― The Unlimited World of Microbes―(IUMS2011), Physiological activity of microbial volatile organic compounds (MVOCs) as a growth regulator in the soil-derived fungal organisms, 2011
  • JAIMAコンファレンス(招待講演), 微生物由来揮発性有機化合物の測定法(招待講演), 2011
  • 第59回質量分析総合討論会(2011), 「リン酸化テトラペプチドイオンの衝突誘起分解におけるフラグメンテーション機構―“On-Resonance” Pulsed Gas Introduction CIDによる Neutral Lossの低減―」(2A-O2-1440), 2011
  • 第59回質量分析総合討論会(2011,大阪) 3C-O1-0920, 「イオンモビリティースペクトロメトリーと質量分析による土壌由来カビAspergillus nidulansの揮発性代謝物の同定」, 2011
  • 第59回質量分析総合討論会(2011), 「Fc領域IgG糖ペプチドのイオンモビリティー質量分析にみられるサブクラス間相違」(3B-O1-0920), 2011
  • 第108回触媒討論会 3F09, 塩素を含有しない前駆体溶液の含浸法により調製した金ナ ノ粒子触媒とそのCO 酸化活性, 2011
  • 第15回ケイ素化学協会シンポジウム, ポリジメチルシロキサンを用いたカビ臭物質濃縮のための 固相マイクロ抽出プローブの開発 ―IMSによる文化財環境モニターへの適用―, 2011
  • 第3回LC/MSワークショップ(招待講演), 「MSフラグメンテーションの基礎理論〜準平衡理論(QET)〜」(招待講演), 2011
  • 日本化学会第91春季年会, 「微生物由来揮発性有機化合物の固相マイクロ抽出ガスクロマトグラフィー質量分析による真菌類のキャラクタリゼーション」, 2011
  • 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '11(ALC'11), Characterization of the Soil-Derived Fungi Based on Mass Spectrometric Analysis of Their Microbial Volatile Organic Compounds, 2011
  • 11th International Symposium on Atomic Level Characterizations for New Materials and Devices '11(ALC'11), Differences in Fragmentation Mechanisms of Protonated Molecules and Molecular Radical Cations from Organometallic Compounds with Si-Si, Ge-Ge and Si-Ge Bonds, 2011
  • 59th ASMS Conference on Mass Spectrometry and Allied Topics MP362, Analysis of Volatile Metabolites Emitted by Soil Fungi Using Head Space Solid-Phase Microextraction GC/MS and Ion Mobility Spectrometry, 2011
  • 質量分析計ユーザーズフォーラム2011(招待講演), 文化財保全環境モニター装置開発のための微生物由来揮発性代謝物MVOCの分析(招待講演), 2011
  • International Union of Microbiological Societies 2011 Congress― The Unlimited World of Microbes―(IUMS2011), Physiological activity of microbial volatile organic compounds (MVOCs) as a growth regulator in the soil-derived fungal organisms, 2011
  • JAIMAコンファレンス(招待講演), 微生物由来揮発性有機化合物の測定法(招待講演), 2011
  • The 59th Annual Conference on Mass Spectrometry (2011), "Fragmentation Mechanisms of Phosphorylated Tetrapeptide Ions in Collision-Induced Dissociations and The Suppression of Neutral Loss Using “On-Resonance” Pulsed Gas Introduction CID" 2A-O2-1440, 2011
  • 第59回質量分析総合討論会(2011,大阪) 3C-O1-0920, イオンモビリティースペクトロメトリーと質量分析による土壌由来カビAspergillus nidulansの揮発性代謝物の同定, 2011
  • The 59th Annual Conference on Mass Spectrometry (2011), 「Fc領域IgG糖ペプチドのイオンモビリティー質量分析にみられるサブクラス間相違」(3B-O1-0920), 2011
  • 第108回触媒討論会 3F09, 塩素を含有しない前駆体溶液の含浸法により調製した金ナ ノ粒子触媒とそのCO 酸化活性, 2011
  • 15th Symposium of The Society of Silicon Chemistry JAPAN, Development of a Solid Phase Micro Extraction Probe made of Polydimethyl- siloxane for the Concentration of Microbial Volatile Organic Compounds ―Application to the Environmental Monitoringi System of Cultural Properties Using Ion Mobility Spectrometry―, 2011
  • 3rd LC/MS Workshop, "Theory of the Fragmentation in Mass Spectrometry --QET/RRKM-" (Invited), 2011
  • TAKEUCHI TAKAE; KIMURA TOMOKO; TANAKA HARUNA; SUZUKI TAKAHITO; IWAGUCHI SHIN'ICHI; KANEKO SACHIYO; KIUCHI MASATO; OKUBO MAMORU; HASHIMOTO YOSHIO; HOSOKAWA YOSHINORI; MATSUTANI TAKAOMI, 日本化学会講演予稿集, 文化財環境モニターのための小型臭気センサーの開発, 12 Mar. 2010, 12 Mar. 2010, 12 Mar. 2010, url
  • 日本化学会第90春季年会特別企画シンポジウム(招待講演), 文化財環境モニターのための小型臭気センサーの開発(招待講演), 2010
  • 58th ASMS Conference on Mass Spectrometry and Allied Topics, MP11, Characterization of Fungi Using SPME-GC/MS of MVOCs Emitted from Aspergillus fumigatus, Aspergillus nidulans, Fusarium solani and Penicillium paneum, 2010
  • 第58回質量分析総合討論会(2010)17P-069, 土壌カビ由来の揮発性有機化合物の固相マイクロ抽出‐ガスクロマトグラフィー質量分析によるカビの識別―Aspergillus sp, Fusarium sp., Penicillium sp., 2010
  • 第58回質量分析総合討論会(2010) 18D-W6-1510(-085), 中赤外レーザーを用いる脱離イオン化の特性と酸性糖質およびSニトロソ化合物への応用, 2010
  • 原子衝突研究協会第35回年会(特別講演), (特別講演)マススペクトロメトリーにおける気相イオン化学と反応ダイナミックス, 2010
  • 日本植物学会第74回大会, 「カビの他感作用物質としての2-Pentadecanone」 1pC01, 2010
  • 日本化学会第90春季年会特別企画シンポジウム(招待講演), 文化財環境モニターのための小型臭気センサーの開発(招待講演), 2010
  • 58th ASMS Conference on Mass Spectrometry and Allied Topics, MP11, Characterization of Fungi Using SPME-GC/MS of MVOCs Emitted from Aspergillus fumigatus, Aspergillus nidulans, Fusarium solani and Penicillium paneum, 2010
  • 第58回質量分析総合討論会(2010)17P-069, 土壌カビ由来の揮発性有機化合物の固相マイクロ抽出‐ガスクロマトグラフィー質量分析によるカビの識別―Aspergillus sp, Fusarium sp., Penicillium sp., 2010
  • 第58回質量分析総合討論会(2010) 18D-W6-1510(-085), 中赤外レーザーを用いる脱離イオン化の特性と酸性糖質およびSニトロソ化合物への応用, 2010
  • (特別講演)マススペクトロメトリーにおける気相イオン化学と反応ダイナミックス, 2010
  • 日本植物学会第74回大会, 「カビの他感作用物質としての2-Pentadecanone」 1pC01, 2010
  • 産業技術総合研究所関西センター研究講演会第3回ナノテクフォーラム, 文化財保存のための臭気センサーの開発, 2009
  • 日本化学会第89春季年会, リン酸化セリンを含むペプチドのMALDIマススペクトルのフラグメンテーション機構に関する量子化学的研究 1PC-078, 2009
  • 日本化学会第89春季年会, 光合成光中心PSII モデル化合物の均一系による酸素発生系の構築 2AP-033, 2009
  • 第57回質量分析総合討論会(2009)3P-054, Aspergillus fumigatus由来の揮発性有機化合物の質量スペクトル, 2009
  • 第57回質量分析総合討論会(2009)3P-036, プロトン付加したセリンリン酸化ペプチドイオンの衝突誘起解離過程に関する量子化学的研究, 2009
  • The 17th Congress of The International Society for Human and Animal Mycology 2009 (ISHAM 2009), Profile of microbial volatile organic compounds (MVOCs) in Aspergillus fumigatus, 2009
  • 57th ASMS Conference on Mass Spectrometry and Allied Topics(TPZ1_64), Ab initio study on ionization and fragmentation in matrix-assisted infrared and ultraviolet laser desorption/ionization mass spectrometry, 2009
  • 57th ASMS Conference on Mass Spectrometry and Allied Topics, Microbial volatile organic compounds of Aspergillus sp., 2009
  • 18th International Mass Spectrometry Conference, 2009, Development of the portable mold-derived odor detecting system based on IMS technique for preventing the deterioration of the cultural properties, 2009
  • 18th International Mass Spectrometry Conference, 2009, Ab initio study on ionization and fragmentation mechanisms of dihydroxylbenzoic acids in IR- and UV-MALDI mass spectrometry, 2009
  • 18th International Mass Spectrometry Conference, 2009, Distinct softness of matrix-assisted 6 μm infrared laser desorption/ionization mass spectrometry, 2009
  • 第3回分子科学討論会, イオンモビリティー衝突誘起解離質量分析とab initio DFT 計算によるシアリルラクトース異性体イオンのフラグメンテーション機構の研究, 2009
  • 産業技術総合研究所関西センター研究講演会第3回ナノテクフォーラム, 文化財保存のための臭気センサーの開発, 2009
  • 日本化学会第89春季年会, リン酸化セリンを含むペプチドのMALDIマススペクトルのフラグメンテーション機構に関する量子化学的研究 1PC-078, 2009
  • 日本化学会第89春季年会, Construction of Homogeneous Photo-oxidation of Water to Dioxygen by Photosystem II Model Complexes, 2009
  • 第57回質量分析総合討論会(2009)3P-054, Mass Spectrometric Analysis of Microbial Volatile Organic Compounds of Aspergillus fumigatus, 2009
  • 第57回質量分析総合討論会(2009)3P-036, Ab Initio Study on Collision-induced Dissociation Mechanisms of Protonated Phosphoseryl-containing Peptide, 2009
  • The 17th Congress of The International Society for Human and Animal Mycology 2009 (ISHAM 2009), Profile of microbial volatile organic compounds (MVOCs) in Aspergillus fumigatus, 2009
  • 57th ASMS Conference on Mass Spectrometry and Allied Topics(TPZ1_64), Ab initio study on ionization and fragmentation in matrix-assisted infrared and ultraviolet laser desorption/ionization mass spectrometry, 2009
  • 57th ASMS Conference on Mass Spectrometry and Allied Topics, Microbial volatile organic compounds of Aspergillus sp., 2009
  • 18th International Mass Spectrometry Conference, 2009, Development of the portable mold-derived odor detecting system based on IMS technique for preventing the deterioration of the cultural properties, 2009
  • 18th International Mass Spectrometry Conference, 2009, Ab initio study on ionization and fragmentation mechanisms of dihydroxylbenzoic acids in IR- and UV-MALDI mass spectrometry, 2009
  • 18th International Mass Spectrometry Conference, 2009, Distinct softness of matrix-assisted 6 μm infrared laser desorption/ionization mass spectrometry, 2009
  • 第3回分子科学討論会, イオンモビリティー衝突誘起解離質量分析とab initio DFT 計算によるシアリルラクトース異性体イオンのフラグメンテーション機構の研究, 2009
  • 日本学術振興会マイクロビームアナリシス第141委員会第134回研究会, 文化財保全環境モニター装置開発のための微生物由来揮発性有機化合物の分析, 2008
  • 日本学術振興会マイクロビームアナリシス第141委員会第134回研究会, 文化財保全と微生物ーなぜ微生物由来揮発性有機化合物の検出が重要なのか, 2008
  • 第32回日本質量分析学会TMS研究部会講演会, 文化財保全環境モニターのための微生物由来揮発性有機化合物の分析方法の開発, 2008
  • 九州大学先導物質化学研究所講演会, 有機イオンのフラグメンテーション機構の質量分析および量子化学的研究 ―SiSi三重結合をもつ新しい化学種の生成とその反応―, 2007
  • Takae Takeuchi, 11th Kyushu International Symposium on Physical Organic Chemistry (KISPOC-XI), Kyushu University (Invited), Generation and Characterization of Silicon-Silicon Triply Bonded Ions in the Gas Phase. A Mass Spectrometric and Theoretical Study (Invited), Sep. 2005, 12 Sep. 2005, 15 Sep. 2005
  • 第53回質量分析総合討論会, 分子を切る新しいはさみ:電子移動解離(ETD) --序および理論的アプローチ--, 2005
  • Takae Takeuchi, The 9th Symposium of the Society of Silicon Chemistry, Japan, (Plenary Lecture, Topics)Heteroepitaxial Growth of SiC using Organosilicon Ion Beam, 28 Oct. 2004, 28 Oct. 2004, 29 Oct. 2004
  • Takae Takeuchi, 15th International Workshop on Inelastic Ion-Surface Collisions, Mass Spectrometric and Theoretical Studies on the Fragmentation Mechanisms of Organic Ions in the Gas Phase─Generation and Characterization of Silicon-Silicon Triply Bonded Ions, 2004
  • 日本質量分析学会 第126回関東談話会・第47回イオン反応研究会 合同講演会, MS/MS解析とフラグメンテーション研究の接点 (招待), 2004
  • Takae Takeuchi, Akinobu Naka, Mitsuo Ishikawa, Fokkens Roel H., Koning Leo J. de, Nibbering Nico M. M., The 77th Autumn Annual Meeting of the Chemical Society of Japan, Generation and Reactivity of Ions Containing An SiC Multiple Bond Using FT-ICR Mass Spectrometry, 24 Sep. 1999, 23 Sep. 1999, 26 Sep. 1999
  • Takae Takeuchi, Japan Society of Water Environment: The 1st Symposium of Mass Spectrometry Division (Plenary Lecture), Molecular Structure and Mass Spectra: Theoretical Approach by Molecular Orbital Methods, 08 Sep. 1998, 08 Sep. 1998, 09 Sep. 1998
  • Takae Takeuchi, Masao Yamamoto, Kichisuke Nishimoto, 10th International Mass Spectrometry Conference, Theoretical Study of Electron Impact Mass Spectrometry. Ab Ab Initio MO Study of the Fragmentation of n-C4H10, C3H7OH, C3H7NH2, Sep. 1985, 13 Sep. 1985, 13 Sep. 1985
  • 10th International Mass Spectrometry Conference, Theoretical Study of Electron Impact Mass Spectrometry. n-C4H10, C3H7OH and C3H7NH2, 1985
  • 大気圧イオン化イオン移動度分析法による気相有機イオンの生成過程の研究 ~微生物由来揮発性代謝物質および呼気分析へのアプロ―チ~
  • Takae Takeuchi; Ayano Matsuo, 14th International Symposium on Atomic Level Characterizations for New Materials and Devices '22, Gas phase reactions in the ion mobility spectra of propionic acids to develop an ambient electron emission ionization ion mobility spectrometer, 19 Oct. 2022, 16 Oct. 2022, 21 Oct. 2022, rm:research_project_id

Works

  • 計算化学による香粧品関連成分の異性化/開裂機構の解析, May 2018, Apr. 2019
  • Theoretical Analysis of Fragmentation and Isomerization of Fragrance Compounds, May 2018, Apr. 2019
  • Ion Mobility Spectrometric Analysis of A Very Small Amount of Gases Employing Electron Emission Ionization Source, Jun. 2018, Nov. 2018
  • Theoretical Analysis of Fragmentation and Isomerization of Fragrance Compounds, Takae Takeuchi, 01 Jan. 2017, 31 Dec. 2017
  • Applications of Computational Chemistry to Elucidations of Gaseous Ion Reaction Mechanisms in Mass Spectrometers for Molecular Structure Analysis of Unknown Compounds, Takae Takeuchi, 01 May 2013, 30 Apr. 2014
  • リン酸化ペプチドのマトリックス支援レーザー脱離衝突誘起解離マススペクトルにおけるフラグメンテーション理論の構築, Apr. 2012, Mar. 2013
  • 飲料水の異味異臭原因解明のための微生物由来揮発性有機化合物(MVOC)の分析方法の開発), Apr. 2012, Sep. 2012
  • IMSによる土壌由来カビ検出データベースの構築, Oct. 2009, Mar. 2012
  • リン酸化ペプチドのマトリックス支援レーザー脱離衝突誘起解離マススペクトルにおけるフラグメンテーションのエネルギー依存性に関する研究, Aug. 2010, Jul. 2011
  • 文化財保全環境モニター開発 土壌由来のカビの検出, Oct. 2007, Mar. 2010
  • リン酸化ペプチドのフラグメンテーション反応に関する研究, Dec. 2008, Nov. 2009
  • リン酸化ペプチドのフラグメンテーション反応に関する理論的研究, Dec. 2007, Nov. 2008
  • ペプチドMSシミュレーションモデルの開発, Dec. 2005, Nov. 2006
  • Study on the control mechanism of interface, Oct. 2000, Jan. 2001
  • 星型ケイ素化合物の質量分析学的研究, 1999, 2001
  • FDMS study on nanosize starlike silicon compounds, 1999, 2001
  • Generation and reactivity of multiple bonded silicon-containing ions using mass spectrometry, Takae Takeuchi, 1995, 2000
  • 機能性有機ケイ素化合物の分子設計に関する基礎的研究, Apr. 1994, Mar. 1995
  • 01 Mar. 2022, 01 Mar. 2022

Awards

  • Award for Distinguished Women's Researcher, Nara Women's University, Takae Takeuchi, Jan. 2020, "Development of the risk control method to prevent the microbial contamination of cultural assets using the AI", rm:research_project_id
  • MSSJ AWARD for Excellent Article, The Mass Spectrometry Society of Japan, Ryuichi Arakawa;Hiroshi Adachi;Yasuo Shida;Katsuaki Shiratsuchi;Takae Takeuchi;Takaaki Nishioka;Yoshinao Wada;rder of the;Japanese syllabary, May 2019, ”Proposal: Recommendation on Measuring and Providing Mass Spectra as Chemical Information of Organic Molecules"
  • The 60th Distinguished Invention Award of the Minister of Education, Culture, Sports, Science and Technology, Ministry of Education, Culture, Sports, Science and Technology(MEXT), Takae Takeuchi;et al., Apr. 2001, "Formation Method of Silicon Carbide Films", Japan, rm:research_project_id
  • MSSJ Research Award, The Mass Spectrometry Society of Japan, Takae Takeuchi, May 1997, "Theoretical Study on Unimolecular Reactions of Molecular Ions in EI Mass Spectra", Japan, rm:research_project_id
  • Best Presentation Award of Annual Conference on Mass Spectrometry, Japan (1996), Mass Spectrometry of Japan, Takae Takeuchi;Naomi Yonezaki;Minae Ito;Masao Yamamoto, May 1996, Ab initio Study of Fragmentation Mechanism of Silacyclobutane Ions, Japan
  • Best Presentation Awards of Annual Conference on Mass Spectrometry, Japan (1994), Mass Spectrometry Siciety of Japan, Takae Takeuchi;Naomi Yonezaki;Masap Yamamoto, May 1994, Fragmentation of Silaspiroalkane Ions, Japan
  • Hayashi Research Grants for Women's Scientists, Hayashi Research Fund for Women's Scientists,, Takae Takeuchi, May 1994, "Fundamental Study on Molecular Design of Functional Organosilicon Compounds", Japan
  • Hayashi Research Grants for International Scientific Exchanges of Women's Scientists, Hayashi Research Fund for Women's Scientists,, Takae Takeuchi, 1991, "Ab Initio MO Study on Fragmentation Mechanisms of Ethylmethyl Silane Ions and Methyl Propyl Silane Ions", Japan
  • 'Under-27' prize, The 10th International Mass Spectrometry Conference, Takae Takeuchi, Aug. 1985, "Theoretical Study of Electron Impact Mass Spectrometry. Ab Ab Initio MO Study of the Fragmentation of n-C4H10, C3H7OH, C3H7NH2"
  • Scholarship, Association of Women's Researchers in Universities Japan,, Takae Takeuchi, Mar. 1981, (Theoretical Study on Unimolecular Dissociation Mechanisms of Organic Ions in EI Mass Spectra), Japan

Industrial Property Rights

  • Patent right, SOLUTION OF GOLD/HYDROXOANION COMPLEX AND PROCESS FOR PRODUCING SUBSTANCE LOADED WITH GOLD NANOPARTICLES, Hiroaki Sakurai, Takae Takeuchi, Kenji Koga, Masato Kiuchi, National Institute of Advanced Industrial Science and Technology, 特願2013-511025(P2013-511025) PCT/JP2012/060494, 18 Apr. 2012, 特開 WO2012/144532, 26 Oct. 2012, 特表WO2012/144532, 26 Oct. 2012, WO2012/14453 JP25740658, 15 May 2015, 24 Jun. 2015, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, 特許第5740658号
  • Patent right, Devices, Methods and Programs of IMS Drift Time Prediction, Ayuko Tachibana, Takae Takeuchi, Toshiki Sugai, Nara Women's University; Toho University; DYNACOM Co.,Ltd., JP2012-254179, 20 Nov. 2012, JP2014-102149A, 05 Jun. 2014, Nara Women's University; Toho University; DYNACOM Co.,Ltd., 特開2014-102149
  • Patent right, Specific Fungal Species Existence Judgment Systems, Specific Fungal Species Existence Judgment Function Acquisition Devices, Specific Fungal Species Existence Judgment Devices, Specific Fungal Species Existence Judging Methods and Programs, Yoshiaki Aoki, Takae Takeuchi, DYNACOM Co.,Ltd.; Nara Women's University, JP2012-238876, 30 Oct. 2012, JP2014-087282, 15 May 2014, DYNACOM Co.,Ltd.; Nara Women's University, 特許公開2014-87282
  • Patent right, Peptide Identification Methods and Devices Using Mass Spectrometry, Takae Takeuchi, Hidenobu Ishida, Shigeki Kajihara, Nara Women's University; Shimadzu Corporation, 特願2006-004553 (P2006-4553), 12 Jan. 2006, 特開2007-187501 (P2007-187501A), 26 Jul. 2007, 特許4855780, 04 Nov. 2011, 18 Jan. 2012, Nara Women's University; Shimadzu Corporation, 特許公開2007-187501
  • Patent right, Peptide identification method using the mass spectrometry, Hidenobu Ishida, Shigeki Kajihara, Takae Takeuchi, Shimadzu Corporation; Nara Women's University, 特願2006-314922 (P2006-314922), 22 Nov. 2006, 特開2008-128849 (P2008-128849A), 05 Jun. 2008, 特許4881701, 09 Dec. 2011, Shimadzu Corporation; Nara Women's University, 特許公開2008-128849
  • Patent right, Formation method of silicon carbide films, Masato Kiuchi, Seiichi Goto, Takashi Matsumoto, Takae Takeuchi, Agency of Industrial Science and Technology (AIST), Osaka National Research Institute, 特願11-108718, 16 Apr. 1999, 特開2000-303174, 31 Oct. 2000, 特許3015892, 24 Dec. 1999, 06 Mar. 2000, President of Agency of Industrial Science and Technology (AIST), 特許第3015892

Research Projects

  • 02 Feb. 2020, 31 Mar. 2023, Principal investigator
  • Identification of compounds that has excellent effect on apple snail attractants, Jul. 2021, Mar. 2023, Coinvestigator, Innovation of a comprehensive management engineering toward the damage eradication of apple snails and development of a control support-system:, Takae Takeuchi; Ayami Iwaki, National Agriculture and Food Research Organization (NARO), Research Program on Development of Innovative Technology, BRAIN
  • Development of IMS system for exhaled breath analysis with atmospheric electron-emitting ionization, Jun. 2020, Mar. 2025, Coinvestigator, Development of IMS system for exhaled breath analysis with atmospheric electron-emitting ionization, Tadashi Iwamatsu; Hitoshi Fujimiya; Takae Takeuchi: Yasuo Seto; Yoshiharu Okamoto, New Energy and Industrial Technology Development Organization (NEDO), Development of a innovative sensing technologies for Establishment of the society with IoT communication system, SHARP CORPORATION, DYNACOM Co.,Ltd., Tottori University, Nara Women's University, RIKEN, rm:presentations
  • Development of IMS system for exhaled breath analysis with atmospheric electron-emitting ionization, Jun. 2020, Mar. 2025, Coinvestigator, Development of IMS system for exhaled breath analysis with atmospheric electron-emitting ionization, Tadashi Iwamatsu; Hitoshi Fujimiya; Takae Takeuchi: Yasuo Seto; Yoshiharu Okamoto, New Energy and Industrial Technology Development Organization (NEDO), Development of a innovative sensing technologies for Establishment of the society with IoT communication system, SHARP CORPORATION, DYNACOM Co.,Ltd., Tottori University, Nara Women's University, RIKEN
  • Challenging Research (Exploratory), Jun. 2018, Mar. 2021, 18K18526, Principal investigator, Development of the next-generation cultural assets mold pollution control system based on the smell material on-site many points measurement, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Challenging Research (Exploratory), Nara Women's University, 6240000, 4800000, 1440000, 文化財とその環境において、微生物、特にカビ(真菌)は、その胞子形成を介して塵と共に空中に拡散し、文化財表面に付着して増殖する。カビの大量増殖を一旦許してしまうと、現状の技術ではカビ汚染の制御が困難となる。従来法のほとんど全てがカビの発生を確認してからの対処法である。現状のモニタリング計測は、温度、湿度のみである。本研究では、見えないところでカビが発生してもニオイであれば早期発見が可能であるとの考えから、ニオイの定点観測によりカビ生育の初期段階でのモニタリングし、文化財カビ汚染制御する方法を検討している。平成30年度は、Direct Analysis in Real Time (DART)を利用したアンビエントイオン化質量分析法によって「カビ臭物質の検出方法」を検討した。DARTでは多くの場合、励起状態のガスが大気中の水と反応して水分子をプロトン化し、それがサンプル分子とプロトン移動反応することによってサンプル分子をイオン化する。気体、液体、固体サンプルのイオン化が可能であるうえにサンプルを大気圧下でDARTイオン源にかざすだけでイオン化できる簡便な操作方法であり、小型であるため、持ち運びがしやすく、文化財現場などのオンサイト分析に適する。文化財環境に生育するカビが出すニオイ物質を固相マイクロ抽出(SPME)ファイバーに吸着させ、DARTイオン源の出口に導入し、カビ臭物質を分析した。その結果、設置型のSPME-GC-EIMS装置を用いて得られたと同様の分析結果が、ポータブル型DARTを連結した装置においても得られた。また、Gaussian 16およびMobcalプログラム、TM法によりカビ臭イオンクラスターの衝突断面積およびイオンドリフト時間を理論的に予測した。, rm:presentations
  • Dec. 2019, Mar. 2020, Principal investigator, Development of the risk control method to prevent the microbial contamination in cultural properties using the AI, Takae Takeuchi, Nara Women's University, ”Award for Distinguished Women's Researcher”, Nara Women's University
  • Grant-in-Aid for Scientific Research (B), Apr. 2017, Mar. 2020, 17H02997, Development of high bright cluster ion beams using organic metals, and its application to stoicheiometry crystal growth, Satoshi Yoshimura, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Osaka University, 9100000, 7000000, 2100000, 本研究では、高精度で質量分離可能な、現有の低エネルギーイオンビーム装置を用いて、有機金属ナノクラスターイオンビームを生成すること、さらに、膜質の改善のため、装置に小規模な改造を加え、このイオンビームを高輝度化し、これを基板に照射することによりストイキオメトリ結晶の成長を試みることを目標としている。 本年度は、主にヘキサメチルジシラザンを原料に用いて実験した。その結果、ヘキサメチルジシラザンの解離によりできるフラグメントイオン種を初めて明らかにした。さらに、ヘキサメチルジシラザンのフラグメントを用いた低エネルギーイオンビームが、窒素含有シリコンカーバイド(SiC-N)の成膜に活用できることが分かった。SiC-Nは、フレキシブルメディアの保護膜、低誘電率材料、パッシベーション膜などへの応用が期待されている。通常は、SiC-Nは、スパッタリングデポジションやプラズマCVDなどの成膜プロセスに、アンモニア等を原料ガスに混合することによって作成される。我々は、ヘキサメチルジシラザンを解離することにより生成されるSiCH5+とSiNH3+というフラグメントイオンに着目し、この両者の混合イオンビームを基板に照射することによるSiC-N成膜プロセスを実現した。従来の方法は、手順がやや面倒であり、また、取り扱いに注意を要する原料ガスを使用しているのに対して、我々の方法では容易かつ安全にSiC-Nを成膜することができる。
  • Grant-in-Aid for Challenging Exploratory Research, Apr. 2015, Mar. 2018, 15K12446, Principal investigator, Development of a new ambient ionization-ion mobility spectrometric method for detecting fungal species in early growth stages, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Nara Women's University, 4160000, 3200000, 960000, Fungi occurring in cultural properties and the environment are problematic. Microbial volatile organic compounds (MVOC) emitted from fungi can be used as a notification of fungal growth in the environment. In this study, we developed a Direct Analysis in Real Time (DART) MVOC monitoring system. MVOC emitted from Penicillium paneum, Fusarium solani, Aspergillus fumigatus, and Aspergillus nidulans in the head-space of the flasks were directly analyzed using the DART-Orbitrap mass spectrometer. The characteristic peaks which correspond to [M-H]+ ions and [M+H]+ ions of C15H24 appeared in the DART mass spectra of MVOCs from Penicillium paneum and Aspergillus fumigatus with the high mass resolution mode. The peak at m/z 123.0447 in the DART mass spectrum of P. paneum was assigned to benzoic acid. It was concluded that the MVOC monitoring with the DART ion source is a promising method for identifying fungal species.
  • Grant-in-Aid for Scientific Research (C), Apr. 2015, Mar. 2017, 15K01132, Coinvestigator, Development of Mass Spectrometic Methods for monitoring and controlling "Microbial Biodeterioration" of Cultural Property, Takahito Suzuki, Masato Kiuchi, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4680000, 3600000, 1080000, これまでAspergillus fumigatusとFusarium solaniを用いて、カビが気相に放出する揮発性有機化合物(MVOC)に注目し、カビ自身の増殖抑制と異種カビ間での相互作用について研究してきた。気相中のMVOC分子はガスクロマトグラフ質量分析計(GC/MS)によってイオン電流値として測定できた。本研究では当該の合成化合物を既知の重量濃度で揮発させ、GC/MSで平行して測定することにより、MVOCごとの検量線を作成してカビから放出されるMVOCの重量濃度を培養経過を追って明らかにした。 F. solaniが放出する自己および他種の増殖抑制活性をもったヘキサナールは、培養中期(菌糸が枝分かれして気中菌糸の先に分生子形成の始まる時期)から培養後期(分生子の成熟と気相への拡散が始まる時期)にかけて0.1~0.2mg/Lになるまで放出されること、他種であるA. fumigatusの増殖抑制作用(アレロパシー)を有するベンズアルデヒドは、培養後期に0.2mg/Lになるまで放出されることが分かった。A. fumigatusの培養では、自己および他種の増殖抑制活性をもったヘプタナールは培養中期から後期にかけて5mg/Lに達することも分かった。これらのアルデヒドは自己および他種のカビの培養初期(分生子の発芽と菌糸伸長開始の時期)に抑制作用を示すことも判明した。
  • Grant-in-Aid for Challenging Exploratory Research, Apr. 2013, Mar. 2015, 25650148, Coinvestigator, Volatile organic compounds emitted in the headspace by fungal colonies play some communicating roles between co-cultured ones., Takahito Suzuki, Takae Takeuchi, Masato Kiuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Nara Women's University, 4030000, 3100000, 930000, Physiological roles of microbial volatile organic compounds (MVOCs) emitted from fungi remain to be unclear. We clarified here the function of MVOCs in terms of their activities on the fungal growth. Application of the co-culturing system in a growth chamber allowed free gas or volatile exchange between a releaser and a receiver, or between the colonies of different growth stage of the same species. Solid phase microextraction-gas chromatography/mass spectrometry (GC/MS) revealed MVOCs of Aspergillus fumigatus and Fusarium solani. Quantitative analysis of MVOC by GC/MS revealed hexanal from F. solani and heptanal from A. fumigatus working as the self-inhibitor of each growth. Benzaldehyde, released from the colonies of F. solani, played as an allelochemical inhibitor against those of A. fumigatus.
  • Grant-in-Aid for Scientific Research (C), Apr. 2012, Mar. 2015, 24619003, Principal investigator, New Approaches to the Fragmentation Theory for Peptide Analyses Using Mass Spectrometry: Fragmentation of Metal-Polypeptide Complexes and Fungal Metabolites, Takae Takeuchi, Takahito Suzuki, Tomohiro Akashi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 5720000, 4400000, 1320000, 1. New approaches to the fragmentation theory for peptide analyses using Mass Spectrometry were performed. To address the general mechanism of ETD on peptide, the electron transfer dissociation process of the Zn2+-histidine oligomer complexes in the absence of remote protons was investigation with the ab initio DFT and the statistical RRKM theory. 2. Software, named MVOC Finder, for fungal species identification based on multivariate statistical analysis of IMS and GC-MS spectral data of MVOC was created. The function of this software is to detect and identify fungal species using atmospheric samples in order to quicken the detection process. In addition, the software can predict the ion mobility drift time of molecular ions from molecular geometries. 3. Microbial volatile organic compounds (MVOC) emitted from Aspergillus nidulans were investigated and the effects of modified expression of some sesquiterpene biosynthesis genes in the genome of A. nidulans were analyzed.
  • Grant-in-Aid for Challenging Exploratory Research, Apr. 2010, Mar. 2013, 22659086, Coinvestigator, Development of early diagnostic method for Deep mycoses by monitoring volatile organic compounds, Shin-ichi Iwaguchi, Takae Takeuchi, Takahito Suzuki, Koji Yokoyama, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Nara Women's University, 3060000, 2700000, 360000, We evaluated the availability of VOCs (volatile organic compounds) as the biomarker during the pulmonary invasive aspergillosis in murine infection model. We established the murine infection model and developed the apparatus for trapping of VOCs in murine breath. The detection of VOCs was performed by the SPME (solid phase microextraction)/ GC-MS (gas chromatography- mass spectrometry) method. Although we found several VOCs (2-ethyl-1-decanol、 2,3,6-trimethyl-octane、Isothiocyanatocyclohexane、1, 4-Methanoazulene (Longifolene)) in mouse chamber, there is no significant difference in TIC chromatograph between healthy and infected mouse. Thus we must reconsider the method for fungal infection.
  • Aug. 2009, Mar. 2012, Principal investigator, Development of Ion Mobility Spectral Database of Microbial Volatile Organic Compounds Emitted from Soil-Derived Fungi, Takae Takeuchi, Yoshitaka Nakamura, Toshiki Sugai, Tomohiro Akashi, Japan Science and Technology Agency (JST), JST-SENTAN Program, Development of Advanced Measurement and Analysis System, Development of Software, 0, 0, 0, Competitive research funding
  • Grant-in-Aid for Scientific Research (C), Apr. 2009, Mar. 2012, 21500988, Principal investigator, Development of methods for analyzing fungal metabolites by using a portable ion mobility spectrometer under atmospheric pressure, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4550000, 3500000, 1050000, Fungal odor analysis in early growth stages is important for the conservation of cultural properties. The analytical methods for detecting fungal species and the stage of growth were developed using a distinctive fungal odor[Takeuchi et al, Surf. Interface Anal., 44(6), 694-698(2012)]. Microbial volatile organic compounds were extracted by solid space microextaction, followed by GC/MS analysis. While the fungi were growing, the amount of alcohols, ketones and aldehydes as MVOCs emitted increased. The detection of sesquiterpenes was useful for determining fungal species. The prototype of solid-phase microextraction inlet system available in an ion mobility spectrometer(IMS) was manufactured. Software programs were also made for identifying fungal species by IMS spectra analysis of the odor.
  • 機器開発プログラム, Oct. 2007, Mar. 2010, Coinvestigator, Development of Environmental Monitoring System for Preservation of Cultural Propeties: Detection of The Soil-derived Fungi, Takahito Suzuki, Mamoru Okubo, Yoshio Hashimoto, Yoshinori Hosokawa, Takae Takeuchi, Takaomi Matsutani, Japan Science and Technology Agency (JST), JST-SENTAN Program: Development of Advanced Measurement and Analysis System, 0, 0, 0, カビによる文化財の劣化や損傷を防止するためには、カビの発生を早期に検出できる先端機器の開発が急務である。カビをはじめとする微生物は、特有の臭い成分を分泌する。イオンモビリティースペクトロメトリー(IMS)を原理とする計測分析機器を開発し、これら臭い成分を文化財の置かれた土壌などの環境でリアルタイムに検出し、文化財保全環境モニターを行う手法を開発する。, Competitive research funding, rm:awards
  • Grant-in-Aid for Scientific Research (B), 2008, 2010, 20300288, Coinvestigator, Analytical studies on microbial volatile organic compounds (MVOCs) and their physiological role in the microbial communities participating in the degradation of cultural properties., Takehito Suzuki, Takae Takeuchi, Shin-ichi Iwaguchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Nara Women's University, 19370000, 14900000, 4470000, (1) Some microorganisms and their communities play a role of deterioration on cultural heritage materials. Detection of their emergence at an earlier stage allows for reducing risks of the deterioration. Emission of MVOCs seems to be an effective candidate for an indicator of the occurrence of their growth. The MVOCs were collected by solid phase micro extraction (SPME) and analyzed by gas-chromatography/mass spectrometry (GC/MS) from the representative microorganisms relating the deterioration, including five fungal genera ( Aspergillus, Penicillium, Acremonium, Fusarium and Aureobasidium) and bacterial Streptomyces. We constructed the Finger Print Database (FPD) of MVOCs determined by GC/MS. We succeeded in developing an innovative apparatus detecting MVOCs based on the principle of ion mobility spectrometry. The FPD of MVOCs was also constructed by IMS. (2) A species of springtail (Collembola) was isolated from soil and its behavior on the flavor of several fungal species, described above, was analyzed using a video-camera. The springtail was found to feed on Penicillium. They did not show a significant feeding attraction or avoidance behavior against those fungi, either. However, obvious attractive one was found to the fungus Cladosporium. (3) The co-culturing system was applied to allow free gas or volatile exchange between the colonies of two fungal species. The effects of Fusarium solani volatiles were found on growth and development of the other fungi Aspergillus fumigatus and Penicillium paneum. Colonies of F. solani were incubated in the same growth chamber as colonies of either A. fumigatus or P. paneum. Analzing MVOCs by GC/MS, 2-pentadecanone, emitted from F. solani, was suggested as an accelerator of conidiophore development in both A. fumigatus and P. paneum. However, benzaldehyde from F. solani, may be an allelochemical inhibitor of growth against both A. fumigatus and P. paneum. (4) As a cooperative research with Prof. Nishiyama at Nara University, we obtained fungal isolates from the Takaida burial cave located at Kashiwara-shi, Osaka, Japan. Using these isolates, the occurrence of growth was investigated by simulation analysis on the process of their growth on the surface of tuff stones in the controlled environment. Fungal growth and the formation of conidia were found on these experiments.
  • Grant-in-Aid for Scientific Research (C), 2007, 2008, 19550149, Coinvestigator, Construction of decomposition systems and elucidation of reaction mechanisms of water and environment toxic substances with the photo-response compounds, Yuriko Abe, Takae Takeuchi, Masato Kiuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4680000, 3600000, 1080000, 光応答型化合物の水および環境有害物質分解システムの構築のために, Mn, Pt, Mg錯体を合成して錯体の反応性と発光特性を検討し, それらの錯体を用いて可視光照射による酸素発生系の反応機構を解明した。さらに, これらの錯体をITO基板上に化学修飾することなく粘土単層膜による無機-有機ハイブリッド多層膜を形成させた電極を作製し, 可視光応答型システムによる水および環境有害物質であるETDA・2Na分解電池の構築を行った。
  • Grant-in-Aid for Scientific Research on Priority Areas (A), Apr. 1999, Mar. 2000, 11120230, Principal investigator, Study on gas-phase ion reactions of unsaturated organic silicon and germanium compounds, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas (A), Nara Women's University, 1800000, 1800000, 有機化学では,炭素間に二重結合をもつ化合物は普通に存在しているが,ケイ素原子との間に二重結合を持つシレン化合物の合成・単離は容易ではない。しかし,通常の条件下では単離や構造解析が困難であるような化学種でも,質量分析計内のような高真空中では,孤立イオンとして検出可能な比較的長い寿命をもつことがある。本研究の目的は,ケイ素多重結合をもつ不飽和ケイ素イオンを質量分析計内で生成させ,その構造と反応性を確かめることである。Bis(silacyclopropane)のフェニル誘導体[1]およびメチル誘導体[2]のEIMSについて,ケイ素三重結合をもつと期待された[M―C_<12>H_<24>]^<+・>イオンの生成機構と,このイオンからの分解過程を,MS/MS法およびB^2/Eリンク走査法によって確かめた。 MS/MSの測定結果から,[1]のm/z210のイオンからは,m/z181が生成することがわかった。これは,C_<12>H_<10>Si_2^<+・>からのSiH脱離であり,StilbeneからCH_3脱離する分解反応と類似していた。このイオンは,さらにC_6H_4を脱離して,C_6H_5Si^+(m/z105)を生成した。M/z105イオンの生成については,この他にm/z210から直接に生成する経路と,m/z210からC_6H_6が離脱したm/z132のイオンを経由して生成する経路が検出された。[2]の高分解MS/MSの結果から,m/z86イオンの97%は,C_2H_6Si_2^<+・>で,C_2H_6Si_2^<+・>イオンからは、m/z71([m/z86-CH_3]^+)とm/z43(CH_3Si^+)が生成していることがわかった。
  • Grant-in-Aid for Scientific Research on Priority Areas (A), Apr. 1998, Mar. 1999, 10133232, Principal investigator, Molecular Level Approach on the d-Electron Effect in Unsaturated Organosilicon Ion-molecule Reactions, Takae Takeuhi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas (A), Nara Women's University, 2000000, 2000000, ケイ素原子との間に多重結合をもつ化合物は不安定であるため,溶液反応では単離することが困難である。しかし,真空下でシラシクロブタンやシラシクロブタジエン誘導体をイオン化すれば,生成した分子イオンの単分子分解によって,SiC二重または三重結合をもつイオンの生成が期待される。本研究の目的は,SiC多重結合をもう不飽和ケイ素イオンを質量分析計中で生成させ,その構造と反応性を確かめることである。1-silacyclobut-3-ene誘導体をイオン化することによって,シラシクロブタジエン誘導体イオンを生成させ,そのイオンの構造をMS/MS法によって解析した。 2-adamanty1-4-tert-buty1-2-trimethylsiloxy-1,1-bis(trimethylsilyl)-1-silacyclobut-3-eneの分子イオンのMS/MSでは,TMS脱離,tert-butyl脱離,および(TMS)_2O脱離によるピークが観測された。フーリエ変換イオンサイクロトロン共鳴(FT-ICR)装置によって,m/z 330のフラグメントイオンの精密質量を測定した結果,その化学組成はC_<20>H_<34>Si_2^<+・>であり,分子イオンからの(TMS)_2O脱離によって生成したSiC二重結合をもつシラシクロブタジエン誘導体イオンであると考えられた。 イオン化室内で生成したフラグメントイオン[M-(TMS)_2O]^<+・>のみを選択し,このイオンからの分解反応を,4セクター型タンデム質量分析計およびFT-ICR装置を用いて確かめた。[M-(TMS)_2O]^<+・>からのMS/MSでは,CH_3脱離やC_3H_5脱離によるピークのほか,m/z 249にピークが観測された。FT-ICR装置を用いた精密質量測定の結果,m/z 249イオンの化学組成はC_<14>H_<25>Si_2^+であり,[TMS-SiC-Ad]にプロトン付加したイオンであると予想された。
  • Grant-in-Aid for international Scientific Research, Apr. 1997, Mar. 1999, 09044085, Coinvestigator not use grants, Molecular Assembling by Radiation Pressure of Laser Beam, Hiroshi Masuhara, M. Van der Auweraer, F.C. De Schryver, Keiji Sasaki, Masao Yamamoto, Kaoru Iwai, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for international Scientific Research, Osaka University, 5900000, 5900000, We have studied formation process of a single microparticle in solution under a microscope by photon pressure of a focused infrared laser beam and analyzed inner structure of the microparticle. This study is regarded as a new chemistry by photon pressure, which is quite different from conventional photophysics and photochemistry. Intramolecular charge transfer molecule was chosen as a fluorescence probe, and its photophysical and photochemical properties were studied in detail. Polyacrylamide polymer bonded with the intramolecular charge transfer molecule was synthesized, and its dynamic responses to thermal, pH, and related stimuli were studied. By focusing the infrared laser beam. the polyacrylamide are gathered at the focal point of the microscope by photon pressure, forming a single microparticle. The preparation process was observed from time to time, and its characteristic inner structure was analyzed by picosecond fluorescence microscopy. Similarly, a single microparticle composed of block copolymer micelles was studied, and local environmental condition and morphology of the single microparticle were revealed by space- and time- resolved fluorescence analysis.
  • Grant-in-Aid for Scientific Research (C), Apr. 1997, Mar. 1999, 09650961, Principal investigator, The Effect of Si d-Orbital in the Ion/Molecule Reactions of Organosilicon, Takae Takeuchi, Masao Yamamoto, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 3600000, 3600000, The purpose of this study is to provide evidence for a facile rearrangement of organosilicon cations and anions and to clarify the mechanisms and the effective factors in the specific reactions which are not observed in organic compounds without metallic atoms. 1. Ion/molecule reactions of silene cation radicals with alkene molecules were investigated using FTICR mass spectrometry. The silene cation radicals [(CH_3)_2SiCH_2]^+ and [(CD_3)_2SiCH_2]+ were generated by 70 eV-electron ionization of 1-dimethyl-1-silacyclobutane and l, 1-[D_6]dimethyl-1-silacyclobutane. After these silene cation radicals were isolated in the FTICR cell, they were allowed to react with ethene, [_4]ethene, or propene molecules under ultra-high-vacuum conditions (l0^<-8>-l0^<-9> mbar). The resulting FTICR spectra show that the adduct ions, produced in the ion/molecule reactions, should have a four-membered ring structure. 2. In order to make an SiC multiple bond, an electron-impact ionization (EI), a chemical ionization (CI) and a fast-ion-bombardment ionization of 2-adamantyl-4-tert-butyl-2-trimethylsiloxy- 1,1-bis(trimethylsilyl)- l-silacyclobut-3-ene were examined in order to generate ions containing an SiC double or triple bond using both a Bruker Apex^ 47e FT-ICR mass spectrometer and a JEOL JMS SX/SX 1 02A four-sector tandem mass spectrometer. From the results of high-resolution mass measurement, the elementary composition of fragment ions at m/z 330 was found to be C_<20>H_<34>Si_2^+. The results of MS/MS/MS and ab initio MO calculations showed that the structure of the m/z 330 ion is a four-membered ring containing an Si=C double bond.
  • Grant-in-Aid for Scientific Research (A), Apr. 1995, Mar. 1998, 07555263, Coinvestigator, Trial of the Preparation of Data Acquisition Format and the Construction of Database for FABMS, Masao Yamamoto, Toshio Sakai, Masami Sawada, Yutaka Fujise, Hidetsugu Abe, Akira Hayashi, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), NARA WOMEN'S UNIVERSITY, 14000000, 14000000, The objects of this project are the preparation of the standardrized FABMS (Fast Atom Bombardment Mass Spectra) data acquisition format and the trial of the construction of FABMS detabase. The FAB mass spectrometry is used as a powerful tool for determining molecular formulae of non-volatile, high-molecular weight compounds, especially biochemical compounds. Though FABMS are very useful, its database is not completed yet for some difficulties. For executing this project, a scientist of the private corporation joined us and gave much more know-how's for measurements. The same samples of proteins, sugars and tetracyclins were measured by using several different type machines. From these FABMS data, the methods of data rearrangements and the standard conditions of measurements were examined. Therefore, the database contains not only spectral data an structural formula, but also detailed masuring conditions such as FAB targets, atomic species for bombardment, liquid matrices used, and etc. The conditions recorded in the database are quite useful for rhose who wish to measure similar kinds of compounds. For the knowledge database it has been tried that the structure informations of compounds from the fragment ion peaks are predicted by using the semiempirical MO calculations.
  • Grant-in-Aid for Encouragement of Young Scientists (A), Apr. 1994, Mar. 1995, 06855102, Principal investigator, Reaction Design for Synthesis of Functional Organosilicon Polymers, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Encouragement of Young Scientists (A), Nara Women's University, 900000, 900000, 新機能性材料として注目されている有機ケイ素ポリマーの合成反応を設計することを目的として,有機ケイ素とアルケンのイオン-分子反応をMS/MS実験および量子化学計算により研究した。 まず,CH_3SiH_2^+イオンとエチレン分子とのイオン-分子反応の反応機構について検討した。MS/MS実験に使用したCH_3SiH_2^+イオンは,メチルプロピルシランイオンの単分子分解によって生成させた。衝突室にエチレンガスを導入し,衝突エネルギーを2keV(高エネルギー)および50eV(低エネルギー)の2つの条件で,CH_3SiH_2^+イオンと衝突させた。MS/MS装置はJEOL JMS-HX/HX110Aタンデム質量分析計を用いた。このイオン-分子反応のポテンシャルエネルギー曲線と最適化構造をab initio MO法により計算した。その結果,CH_3SiH_2^+イオンとエチレン分子はケイ素にエチレンのπ-オ-ビタルが配位した構造の安定な中間体を形成し,この反応は,1.3eV(3-21G基底)の発熱反応であることがわかった。この中間体では,エチレンのπ-結合とケイ素原子との距離は2.3Aで,正電荷はケイ素原子に局在していた。生成した[CH_3SiH_2^+]C_2H_4は,さらにより安定な中間体(C_2H_5)(CH_3)SiH^+と(CH_3)_3Si^+に異性化することがab initio MO計算の結果からわかった。 次に,ブチルメチルシラン,ブチルジメチルシラン,およびブチルトリメチルシランの分子イオンの分解機構をリンク走査法とab initio MO法を用いて検討した。Si原子に結合するメチル基の数が増えるにつれて,CH_3脱離によるイオンが多く生成した。分子イオンからのH脱離はSiに結合したHに由来し,H_2脱離は1,1-脱離と1,4-脱離によることがわかった。Si-C超共役による安定化エネルギーが[CH_3SiH_2CH_2CH_2]^+生成の推進力であることもわかった。Si-C超共役による安定イオンの存在は,有機ケイ素に特徴的な性質であり,これを生かした機能性有機ケイ素の分子設計への足がかりが得られた。
  • Grant-in-Aid for General Scientific Research (C), Apr. 1992, Mar. 1993, 04650774, Others, Fundamental Study on Syntheses and Properties of Organosilicone Compounds Using Ion-Molecules Reactions, Masao Yamamoto, Kaoru Iwai, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for General Scientific Research (C), Nara Women's University, 2000000, 2000000, 炭素原子の1個あるいは2個をケイ素原子で置き換えたアルキルシランとシラシクロアルカンを本研究の試料にした。反応経路を詳細に検討するために重水素置換化合物を合成した。置換位置はケイ素に結合した水素のほかアルキルシランではすべての炭素原子に結合した水素を、シラシクロアクカンではα位の炭素に結合した水素を目標にした。エチルプロピルシランでは7種、2個のケイ素の間にメチレン基をはさんだアルキルジシランは12種、4,5,6員環のシラシクロアルカンでは20種になった。これらはいずれもガスクロマト分取により精製し、質量スペクトルの試料とした。EIMSに現れる分子イオンからの分解反応を検討した。エチルプロピルシランのメチル基脱離はプロピル基側からのみ脱離し、ケイ素に結合した水素はプロピル基側の水素と容易に交換する。ジシランでは2個のケイ素間にあるメチレン基の数で反応様式が変化する。0あるいは1個のジシランではケイ素に結合したメチル基ともう1つのケイ素に結合した水素とが開裂を伴って交換をするが、メチレン基が多くなるにつれてこのような転位反応は減少し、ケイ素原子に由来する反応は少なくなる傾向を見せる。シラシクロアルカンではエチレン脱離と引き続くエチレン脱離が特異的に大きく起きる。最初の開裂はケイ素とα炭素との結合で、その際ケイ素に結合した水素とα炭素に結合した水素の交換を伴う。ケイ素にメチル基があるとエチレン脱離とメチル脱離が競争する。シラシクロヘキサン分子イオンのab initio MO計算から、分子イオンはケイ素とα炭素との結合が伸び、ケイ素に正電荷が炭素にラジカルが存在した安定化構造をもつ。これらの反応は溶液反応と類似性をもつと考えられるものがあり、イオン分子反応研究への足がかりが得られた。
  • Grant-in-Aid for Encouragement of Young Scientists (A), Apr. 1992, Mar. 1993, 04855164, Principal investigator, Molecular Design of Functional Organosilicone Compounds, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Encouragement of Young Scientists (A), Nara Women's University, 800000, 800000
  • Grant-in-Aid for Encouragement of Young Scientists (A), Apr. 1991, Mar. 1992, 03855188, Principal investigator, Fundamental Study on Molecular Design of Organosilicone Compounds with the Function, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Encouragement of Young Scientists (A), Nara Women's University, 1000000, 1000000
  • Grant-in-Aid for Encouragement of Young Scientists (A), Apr. 1990, Mar. 1991, 02855206, Principal investigator, Fundamental Study on Molecular Design of Functional Organosilicone Compounds, Takae Takeuchi, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for Encouragement of Young Scientists (A), Nara Women's University, 800000, 800000
  • Grant-in-Aid for General Scientific Research (C), Apr. 1989, Mar. 1991, 01550653, Coinvestigator, Synthedses of Aklylsilanes and Study of the Ion-Molecule Reactions Related to their Properties, Masao Yamamoto, Takae Takeuchi, Kaoru Iwai, Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research Grant-in-Aid for General Scientific Research (C), Nara Women's University, 1700000, 1700000, The alkylmonosilanes, alkyldisilanes and their deuterium labeled compounds were synthesized, and the EIMS were measured. The fragmentation mechanisms were studied in the comparison with their condensed phase reactions. Most of the fragment ions appeared in EIMS can be explained on the analogy of the condensed phase reactions. The main ion of m/z 73 (CH_3SiH_2CH_2CH_2^+) in monolanes is stabilized by s-p conjugation. From the abinitio MO calculation, the optimized geometry of this ion shows that the SiH_2-CH_2 bond and the neighboring CH_2-CH_2 bond become shorter than those of molecular ion and the bond angle of Si-C-C approaches to right angles. The characteristic ion of 1, 1, 2, 2-tetramethyldisilane is also m/z 73 as same as that of monosilanes. However, from the results of deuterium labeled compounds it can be known that the structure of this ion, (CH_3)_3Si^+, is quite different from that of monosilanes. The intermediate of this decomposition reaction is considered to be the four-membered ring structure. The mass spectra of dimethylphenylchlorosilane (MW=170) were measured by LC/MS method. Two kinds of the eluates, CH_3CN and MeOH/AcONH_4, were used. From the results of ion-molecule reaction between sample and eluate, it may become possible to investigate the properties and reactivities of the sample molecule. As the difference between both eluates it can be found that the intensity ratio between m/z 170 and m/z 171 of molecular ion group is different.
  • Jun. 2018, Mar. 2021, 18K18526, Principal investigator

Ⅲ.社会連携活動実績

1.公的団体の委員等(審議会、国家試験委員、他大学評価委員,科研費審査委員等)

  • The Chemical Society of Japan (CSJ), Gender Equality Committee, Mar. 2011, 9999, Society
  • Japan Society for the Promotion of Science/, R026 Committee: Future Design of Advanced Analytical Instrumentation Technologies, Secretary, Apr. 2020, 9999, Government
  • Japan Society for the Promotion of Science, The 193rd Committee: Measurement and Chatacterization Platform, Apr. 2018, 9999, Government
  • International Union of Pure and Applied Chemistry (IUPAC),, Division V, Analytical Chemistry Division, Titular Member (TM)(2020-2021) (2018-2019Secretary), Jan. 2016, 9999, Government
  • International Advisory Committee & Prgram Committee of the 14th International Symposium on Atomic Level Characterizations for New Materials and Devices '22., ALC'22 International Advisory Committee & Prgram Committee, Jan. 2022, 9999, Society
  • The Society of Silicon Chemistry Japan,, Board of Directors, Apr. 2003, 9999, Society
  • Science Council of Japan,, Chemistry Committee (Secretary of Analytical Chemistry Division(2011-Present), Secretary of IUPAC Division (2014-Present),Secretary of the Subcommittee Which Proposes the Reference Standard of Chemistry Education in Universities (2016-2018)), Oct. 2008, 9999, Government
  • Mass Spectrometry Society of Japan, Board of Directors, Jun. 2021, 9999, Society
  • International Advisory Committee of the 13th International Symposium on Atomic Level Characterizations for New Materials and Devices '21,, The ALC'21 International Advisory Committee, Sep. 2020, Dec. 2021, Society
  • Japan Society for the Promotion of Science, R&D committee: New Value Creation of Autonomous- and Cooperative-Type Advanced Measurement using "AI", Apr. 2018, Mar. 2021, Government
  • The Mass Spectrometry Society of Japan,, Division Chair of Spectral Data Division, Apr. 2015, 9999, Society
  • The Kinka Chemical Society, Japan,, Council, Delegate, Apr. 2014, 9999, Society
  • The Mass Spectrometry Society of Japan,, Gender Equality Committee (Chair of Gender Equality Committee, April 1, 2013 - March 31, 2015), Apr. 2013, Mar. 2021, Mass Spectrometry Society of Japan, Society
  • Science Council of Japan,, Chemistry Committee (Secretary of Analytical Chemistry Division(2011-Present), Secretary of IUPAC Division (2014-Present),Secretary of the Subcommittee Which Proposes the Reference Standard of Chemistry Education in Universities (2016-2018)), Oct. 2008, 9999, Government
  • The Mass Spectrometry Society of Japan, Division Chair of Fundamentals, Ionization and Ion Chemistry in Mass Spectrometry, Apr. 1999, 9999, Mass Spectrometry Society of Japan, Society
  • The Mass Spectrometry Society of Japan,, Member of Nomenclature Subcommittee (Chair of Nomenclature Subcommittee (April 2015 - March 2017)), Apr. 1995, 9999, Mass Spectrometry Society of Japan, Society
  • IYPT(International Year of the Periodic Table of Chemical Elements) Committee, Essay contest executive committee, Dec. 2018, May 2020, Society
  • Japan Society for the Promotion of Science, Microbeam Analysis, the 141st Committee, (2019.09-2020.03 Committee Vice-Chairperson), Sep. 2004, Mar. 2020, Government
  • The Japan Society of Vacuum and Surface Science (JVSS), The Division of Microbeam Analysis, Chairperson of the International Cooperation Committee, Apr. 2020, 9999, Society
  • New Energy and Industrial Technology Development Organization (NEDO), Advanced Program for Enery and Environmental New Technologies "Research and Development of the Innovative Inspection Evaluation New Technology Suitable for Big Data" (Project C) (Member of the Investigation Committee), Apr. 2017, Mar. 2018, Government
  • Japan Society for the Promotion of Science, The construction of the measurement analysis platform strategy for the innovation creation, Nov. 2014, Oct. 2017, Government
  • The Mass Spectrometry Society of Japan (MSSJ), Board Member of Directors, Apr. 2013, Mar. 2017, Society
  • Nara Prefecture,, Council for Natural Environments maintenance, Hot Spring Division, Apr. 2005, Dec. 2015, Autonomy
  • Science Council of Japan (IUPAC NAO), Delegate to the 48th IUPAC General Assembly, 2015, Aug. 2015, Aug. 2015, Government
  • Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT), The Council for Science and Technology "Development of Advanced Measurement and Analysis System", Feb. 2009, Jan. 2015, Government
  • Science Council of Japan (IUPAC NAO), Delegate to the 47th IUPAC General Assembly, 2013, Aug. 2013, Aug. 2013, Science Council of Japan, Government
  • 19th International Mass Spectrometry Conference (IMSC), Program Committee, Apr. 2011, Mar. 2013, International Mass Spectrometry Society, Society
  • The Chemical Society of Japan, Member of Gender Equality Committee, Mar. 2011, Feb. 2013, The Chemical Society of Japan, Society
  • Japan Society for the Promotion of Science (JSPS), R&D Committee on Preservation Technology of Cultural Properties, Apr. 2007, Mar. 2010, Government
  • Japan Society for the Promotion of Science (JSPS), R&D Committee on Atom and Cluster Beams Technology, Jul. 2006, Jun. 2009, Government
  • The Mass Spectrometry Society of Japan (MSSJ), Board of Directors (Secretary General (April 2007- March 2009)), Apr. 2005, Mar. 2009, Mass Spectrometry Society of Japan, Society
  • Mass Spectrometry Society of Japan, Editor, Journal of the Mass Spectrometry of Japan, Apr. 1995, Mar. 2009, Society
  • Mass Spectrometry Society of Japan, Member, Board Committee (Director of Board Committee 2007-2009), Apr. 1995, Mar. 2009, Mass Spectrometry Society of Japan, Society
  • The Chemical Society of Japan,, Kinki Branch, Board of Directors, Mar. 2007, Feb. 2009, Society
  • Mass Spectrometry Society of Japan,, Board Member of Directors, Apr. 1999, Mar. 2003, Mass Spectrometry Society of Japan, Society
  • Mass Spectrometry Society of Japan,, Chair of Public Relations Subcommittee, Apr. 1999, Mar. 2001, Mass Spectrometry Society of Japan, Society
  • Mass Spectrometry Society of Japan, Member, Board Committee, Apr. 1995, Mar. 1997, Mass Spectrometry Society of Japan, Society
  • Mass Spectrometry Society of Japan,, Mass Spectral Database Division, Apr. 1991, Mar. 1997, Mass Spectrometry Society of Japan, Society
  • Mass Spectrometry Society of Japan, Board of Directors, Jun. 2021, 9999, Society
  • The Mass Spectrometry Society of Japan, Division of Biological Mass Spectromety, Organizing Committee Chair of The 48th BMS Conference, Jan. 2020, 9999, Society


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.