イオン液体の高速動力学と階層的秩序の解明

2009 年度 研究成果報告書

• 研究課題/領域番号: 17073003
• 研究種目: 特定領域研究
• 配分区分: 補助金
• 審査区分: 理工系
• 研究機関: 学習院大学
• 研究代表者: 岩田 耕一 学習院大学, 理学部, 教授 (90232678)
• 研究期間 (年度): 2005 – 2009
• キーワード: イオン液体 / 階層構造 / 局所構造 / 時間分解分光法 / 粘度 / 熱拡散定数 / 溶媒和電子

研究概要

「イオン液体」は,塩であるにもかかわらず室温で液体である.大多数のイオン液体は大気中に蒸発しないため,環境への負荷が小さい溶媒として利用されている.本研究では,時間分解分光測定によってイオン液体中で進行する超高速現象を測定し,イオン液体内部の分子レベルでの環境と巨視的物性との相関について調べた.イオン液体中での存在が推定されている「局所構造」がイオン液体の物性とそこで進行する化学反応に大きな影響を与え得ると結論した.

研究成果

• [雑誌論文] Two different charge transfer states of photoexcited 9,9'-bianthryl in polar and nonpolar solvents characterized by nanosecond time-resolved near-IR spectroscopy in the 4500-10500cm^<-1> region (2010)
  • 著者名/発表者名: N.Asami, T.Takaya, S.Yabumoto, S.Shigeto, H.Hamaguchi, K.Iwata
  • 雑誌名: J.Phys.Chem.A 114(22) ページ: 6351-6355
  • 査読あり
• [雑誌論文] Effect of cluster formation of solvent molecules on the preferential solvatation of anthracene in binary alcoholic solutions (2009)
  • 著者名/発表者名: S.Kunsagi-Mate, K.Iwata
  • 雑誌名: Chem.Phys.Lett. 473(4-6) ページ: 284-287
  • 査読あり
• [雑誌論文] Intermolecular interaction between W(CO)_6 and alkane molecules probed by ultrafast vibrational energy relaxation : anomalously strong interaction between W(CO)_6 and decane (2009)
  • 著者名/発表者名: M.Banno, K.Iwata, H.Hamaguchi
  • 雑誌名: J.Phys.Chem.A 113(6) ページ: 1007-1011
  • 査読あり
• [雑誌論文] Femtosecond Time-Resolved Absorption Anisotropy Spectroscopy on 9,9'-Bianthryl : Detection of Partial Intramolecular Charge Transfer in Polar and Nonpolar Solvents (2009)
  • 著者名/発表者名: T.Takaya, H.Hamaguchi, K.Iwata
  • 雑誌名: J.Chem.Phys. 130(1) ページ: 014501-1-014501-9
  • 査読あり
• [雑誌論文] I Ultrafast bimolecular radical reaction between S_1 p-terphenyl and carbon tetrachloride. Mode-specific acceleration of vibrational dephasing in reactant molecule (2008)
  • 著者名/発表者名: K.Iwata
  • 雑誌名: J.Raman.Spectrosc. 39(11) ページ: 1512-1517
  • 査読あり
• [雑誌論文] Vibrational Cooling Process of S_1 trans-stilbene in Ionic Liquids Observed with Picosecond Time-Resolved Raman Spectroscopy (2007)
  • 著者名/発表者名: K.Iwata, K.Yoshida, Y.Takada, H.Hamaguchi
  • 雑誌名: Chem.Lett. 36(4) ページ: 504-505
  • 査読あり
• [雑誌論文] Picosecond time-resolved fluorescence study on solute-solvent interaction of 2-Aminoquinoline in room-temperature ionic liquids : π-π aromatic complex formation and unusually slow rotational diffusion (2007)
  • 著者名/発表者名: K.Iwata, M.Kakita, H.Hamaguchi
  • 雑誌名: J.Phys.Chem.B 111(18) ページ: 4914-4919
  • 査読あり
• [雑誌論文] Intra- and inter-molecular vibrational energy transfer in tungsten carbonyl complexes W(CO)_5(X) (X=CO, CS, CH_3CN, and CD_3CN) (2007)
  • 著者名/発表者名: M.Banno, K.Iwata, H.Hamaguchi
  • 雑誌名: J.Chem.Phys. 126(20) ページ: 204501-1-204501-9
  • 査読あり
• [雑誌論文] Local structure formation in alkyl-imidazolium based ionic liquids as revealed by linear and non-linear Raman spectroscopy (2007)
  • 著者名/発表者名: K.Iwata, H.Okajima, S.Saha, H.Hamaguchi
  • 雑誌名: Acc.Chem.Res. 40(11) ページ: 1174-1181
  • 査読あり
• [雑誌論文] Charge Resonance Character in Charge Transfer State of Bianthryls : Effect of Symmetry Breaking on Time-Resolved Near-IR Absorption Spectra (2006)
  • 著者名/発表者名: T.Takaya, S.Saha, H.Hamaguchi, M.Sarkar, A.Samanta, K.Iwata
  • 雑誌名: J.Phys.Chem.A(letter) 110(13) ページ: 4291-4295
  • 査読あり
• [雑誌論文] Solvent-dependent intra- and intermolecular vibrational energy transfer of W(CO)_6 probed with sub-picosecond time-resolved infrared spectroscopy (2005)
  • 著者名/発表者名: Motohiro Banno, Shin Sato, Koichi Iwata, Hiro-o Hamaguchi
  • 雑誌名: Chem.Phys.Lett. 412(4-6) ページ: 464-169
  • 査読あり
• [学会発表] New Attempts with Raman Spectroscopy for Examining Macromolecules and Lipid Bilayer Membranes (2010)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: XXIIth International Conference on Raman Spectroscopy (ICORS2010)(Invited)
  • 発表場所: Boston, MA, USA
  • 年月日: 2010-08-09
• [学会発表] How Electron Relaxes in Micellar Solution, Ionic Liquid, and TiO_2 Photocatalyst : Femtosecond Time-resolved Near-infrared Study (2010)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: Advanced Spectroscopy and Imaging in Molecular Science(Invited)
  • 発表場所: Hsinchu, Taiwan
  • 年月日: 2010-07-13
• [学会発表] Loose electrons in micellar solution and TiO_2 photocatalysts examined with femtosecond time-resolved near-IR spectroscopy (2009)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: The Second Asian Spectroscopy Conference (ASC09)(Invited)
  • 発表場所: Seoul, Korea
  • 年月日: 20091130-20091202
• [学会発表] Disagreement between Microscopic Solvation Environments and Macroscopic Properties in Ionic Liquids (2009)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: 3rd Congress on Ionic Liquids (COIL-3)
  • 発表場所: Cairns, Australia
  • 年月日: 20090531-20090604
• [学会発表] Microscopic Solvation Environments and Macroscopic Properties : Loss of Correlation in Ionic Liquid (2009)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: COIL-3 Pre-Symposium "Science of Ionic Liquids"
  • 発表場所: Cairns, Australia
  • 年月日: 20090529-20090530
• [学会発表] Loss of correlation between microscopic solvation environments and macroscopic properties : Partially ordered structure in ionic liquids (2009)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: 5th International Conference on Advanced Vibrational Spectroscopy (ICAVS-5)(Invited)
  • 発表場所: Melbourne, Australia
  • 年月日: 2009-07-16
• [学会発表] Layers of intermolecular interaction specified with picosecond time-resolved Raman spectroscopy (2008)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: 80 Years of Raman Effect, "Reflection and the Future"(Invited)
  • 発表場所: Bangalore, India
  • 年月日: 20081208-20081210
• [学会発表] Using Ultrafast Time-resolved Near IR Spectroscopy to Probe Photocatalytic Reactions on TiO_2 (2008)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: 35th FACSS (Federation of Analytical Chemistry and Spectroscopy Societies)(Invited)
  • 発表場所: Reno, Nevada, USA
  • 年月日: 20080928-20081002
• [学会発表] International Symposium on Structure and Reaction Dynamics of Ionic Liquids in Kanazawa (2008)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: International Symposium on Structure and Reaction Dynamics of Ionic Liquids in Kanazawa(Invited)
  • 発表場所: Kanazawa, Japan
  • 年月日: 20080902-20080903
• [学会発表] Photoinduced bimolecular radical reaction between p-terphenyl and carbon tetrachloride studied by picosecond time-resolved Raman spectroscopy - mode-selective acceleration of vibrational dephasing (2008)
  • 著者名/発表者名: Koichi Iwata, K. Yoshida, H. Hamaguchi
  • 学会等名: 20th International Conference on Raman Spectroscopy (ICORS2008)(Invited)
  • 発表場所: London, UK
  • 年月日: 20080817-20080822
• [学会発表] Photochemical and Photophysical Processes in Room-temperature Ionic Liquids Studied by Ultrafast Time-resolved Spectroscopy (2008)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: Trombay Symposium on Radiation and Photochemistry (TSRP2008)(Invited)
  • 発表場所: Pune, India
  • 年月日: 20080107-20080111
• [学会発表] Picosecond Time-resolved Raman and Fluorescence Studies of Ionic Liquids : Disagreement between Macroscopic and Microscopic Properties (2007)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: 2nd International Congress on Ionic Liquids (COIL-2)
  • 発表場所: Yokohama, Japan
  • 年月日: 20070805-20070810
• [学会発表] Chemical reactions in ionic liquids studied by picosecond time-resolved Raman spectroscopy and femtosecond time-resolved near-infrared spectroscopy (2007)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: Structure and Dynamics of Ionic Liquids
  • 発表場所: Kazusa, Japan
  • 年月日: 20070802-20070804
• [学会発表] Fast dynamics in ionic liquids probed with time-resolved spectroscopy : Raman, fluorescence, and near-infrared (2007)
  • 著者名/発表者名: Koichi Iwata
  • 学会等名: The First Asian Spectroscopy Conference (ASC'07)(Invited)
  • 発表場所: Bangalore, India
  • 年月日: 20070128-20070202
• [学会発表] Vibrational Dynamics in Ionic Liquids Observed with Picosecond Time-Resolved Raman Spectroscopy (2006)
  • 著者名/発表者名: Koichi Iwata, Yuta Takada, Kyousuke Yoshida, Hiro-o Hamaguchi
  • 学会等名: 20th International Conference on Raman Spectroscopy (ICORS2006)(Invited)
  • 発表場所: Yokohama, Japan
  • 年月日: 20060820-20060825
• [図書] 第5版実験化学講座9『物質の構造I分光上』(第8.2.1節ラマン散乱の測定装置" 第8.2.2節測定上の注意" 第8.3.4節時間分解ラマン") (2005)
  • 著者名/発表者名: 岩田耕一
  • 総ページ数: 506-513(513-526,560-567)
  • 出版者: 丸善
• [備考] ホームページ等
  • URL: http://www-cc.gakushuin.ac.jp/~20040130/index.htm