Development of pico-second time-resolved magnetic resonance spectrometer and its application for study of photochemical processes

• Project/Area Number: 19350008
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: KAWAI Akio Tokyo Institute of Technology, 大学院・理工学研究科, 准教授 (50262259)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2007: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
• Keywords: 超高速磁気共鳴 / 光化学 / スピン分極 / 光物理 / 超精密計測 / ラジカル / 化学物理

Research Abstract

MRIなどに代表されるような広い分野で活用される磁気共鳴装置は、短寿命活性化学種の観測には不向きな装置である。この問題点の解決を目指し、最高でピコ秒時間分解能をもつ磁気共鳴分光装置を、レーザー光磁気効果を利用した原理に基づいて設計製作した。このような装置を用い、光化学反応や光物理過程で発生するスピン分極した常磁性分子の超高速観測実験を行い、装置の利点や欠点について総括した。

Research Products

• [Journal Article] CIDEP created by the quenching of photo-excited tryptophan at protein surface: A challenge to CIDEP probing of protein structural changes (2010)
  • Author(s): Akio Kawai, Shuichi Mori, Kazuhide Tsuji, Kazuhiko Shibuya
  • Journal Title: Appl. Magn. Reson. 38 Pages: 206-215
  • Peer Reviewed
• [Journal Article] Photochromic Reaction of a Novel Room Temp-erature Ionic Liquid: 2-Phenylazo-1-hexyl-3-methylimidazolium Bis(pentafluoroethyl-sulfonyl) amide (2010)
  • Author(s): Akio Kawai, Daiki Kawamori, Tomoo Monji, Tooru Asaka, Nobuyuki Akai, Kazuhiko Shibuya
  • Journal Title: Chem. Lett. 39 Pages: 230-231
  • NAID: 130004425792
  • Peer Reviewed
• [Journal Article] Kinetic study on the photoabsorption process of gaseous O2 dimol at 630 nm in a wide pressure range (2010)
  • Author(s): Akira Ida, Eiji Furui, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: Chem. Phys. Lett. 488 Pages: 130-134
  • Peer Reviewed
• [Journal Article] Photochromism of 3-butyl-1-methyl-2-phenylazoimidazolium in room temp-erature ionic liquids (2010)
  • Author(s): Tooru Asaka, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: J. Photochem. Photobiol. A Chemistry 209 Pages: 12-18
  • Peer Reviewed
• [Journal Article] CIDEP created by the quenching of photo-excited tryptophan at protein surface : A challenge to CIDEP probing of protein structural changes (2010)
  • Author(s): Akio Kawai, Shuichi Mori, Kazuhide Tsuji, Kazuhiko Shibuya,
  • Journal Title: Appl.Magn.Reson. (印刷中)
  • Peer Reviewed
• [Journal Article] Kinetic study on the photoabsorption process of gaseous O_2 dimol at 630 nm in a wide pressure range (2010)
  • Author(s): A.Ida, E.Furui, N.Akai, Akio Kawai, K.Shibuya
  • Journal Title: Chem.Phys.Letters, (印刷中)
  • Peer Reviewed
• [Journal Article] Photochromic Reaction of a Novel Room Temperature Ionic Liquid : 2-Phenylazo-1-hexyl-3-methylimidazolium Bis (pentafluoroethylsulfonyl) amide (2010)
  • Author(s): Akio Kawai, D.Kawamori, T.Monji, T.Asaka, N.Akai, K.Shibuya
  • Journal Title: Chem.Letters 39 Pages: 230-231
  • NAID: 130004425792
  • Peer Reviewed
• [Journal Article] Photochromism of 3-butyl-l-methyl-2-phenylazoimidazolium in room temperatureionic liquids (2010)
  • Author(s): Tooru Asaka, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: J.Photochem.Photobiol.A Chemistry 209 Pages: 12-18
  • Peer Reviewed
• [Journal Article] EPR Study on Rotational Diffusion inViscous Ionic Liquids: Analysis by a Fractional Stokes-Einstein-Debye Law (2009)
  • Author(s): Yusuke Miyake, Takehiro Hidemori, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya, Shinichi Koguchi, Tomoya Kitazume
  • Journal Title: Chem. Lett 38 Pages: 124-125
  • Peer Reviewed
• [Journal Article] Cryogenic Neon Matrix-isolation FTIR Spectroscopy of Evaporated Ionic Liquids: Geometrical Structure of Cation Anion 1:1 Pair in the Gas Phase (2009)
  • Author(s): Nobuyuki Akai, Parazs David, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: J. Phys. Chem. B 113 Pages: 4756-4762
  • Peer Reviewed
• [Journal Article] Observation of collision-induced near-IR emission of singlet oxygen O2 a1g generated by visible light excitation of gaseous O2 dimol (2009)
  • Author(s): Eiji Furui, Akira Ida, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: Chem. Phys. Lett 471 Pages: 45-49
  • Peer Reviewed
• [Journal Article] Neon Matrix-isolation infrared spectrum of HOOCl measured upon the VUV-light irradiation of an HCl/O2 mixture (2009)
  • Author(s): Takeo Yoshinobu, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: Chem.Phys.Letters, 477 Pages: 70-74
  • Peer Reviewed
• [Journal Article] Cryogenic Neon Matrix-isolation FTIR Spectroscopy of Evaporated Ionic Liquids : Geometrical Structure of Cation Anion 1:1 Pair in the Gas Phase (2009)
  • Author(s): Nobuyuki Akai, Parazs David, Akio Kawai, Kazuhiko Shibuya
  • Journal Title: J.Phys.Chem.B 113 Pages: 4756-4762
  • Peer Reviewed
• [Journal Article] EPR Study on Rotational Diffusion in Viscous Ionic Liquids : Analysis by a Fractional Stokes-Einstein-Debye Law (2009)
  • Author(s): Yusuke Miyake, Takehiro Hidemori, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya, Shinichi Koguchi, Tomoya Kitazume
  • Journal Title: Chemistry Letters 38 Pages: 124-125
  • NAID: 10025118990
  • Peer Reviewed
• [Journal Article] Observation of collision-induced near-IR emission of singlet oxygen O_2 a^1△_g generated by visible light excitation of gaseous O_2 dimol (2009)
  • Author(s): Eiji Furui, Akira Ida, Nobuyuki Akai, Akio Kawai. Kazuhiko Shibuya
  • Journal Title: Chemical Physics Letters 471 Pages: 45-49
  • Peer Reviewed
• [Journal Article] First Observation of the Matrix-isolated FTIR Spectrum of Vaporized Ionic Liquid: An Example of Emim TFSI,1-Ethyl-3-methylimidazolium Bis (trifluoromethanesulfonyl) imide (2008)
  • Author(s): N. Akai, A. Kawai, K. Shibuya
  • Journal Title: Chemistry Letters 37 Pages: 256-257
  • NAID: 10021078063
  • Peer Reviewed
• [Presentation] Trplet excited state quenching by molecular oxygen in ionic liquids (2010)
  • Author(s): T.Shiozaki, N.Akai, Akio Kawai, K.Shibuya
  • Organizer: アメリカ化学会
  • Place of Presentation: サンフランシスコ
  • Year and Date: 2010-03-25
• [Presentation] Triplet excited state quenching by molecular oxygen in ionic liquids (2010)
  • Author(s): Takehiro Shiozaki, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
  • Organizer: ACS meeting
  • Place of Presentation: San Francisco, U.S.A.
• [Presentation] イオン液体中におけるプロトン化ポルフィリン三重項の時間分解EPRスペクトル (2009)
  • Author(s): 河合明雄, 三宅祐輔, 塩崎雄大, 赤井伸行, 渋谷一彦, Thomas Berthold, Stefan Weber, Gerd Kothe
  • Organizer: 電子スピンサイエンス学会
  • Place of Presentation: 神戸大学
  • Year and Date: 2009-11-10
• [Presentation] イオン液体中の酸素分子による三重項緩和ダイナミクス (2009)
  • Author(s): T.Shiozaki, N.Akai, Akio Kawai, K.Shibuya
  • Organizer: 分子科学会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-09-21
• [Presentation] フェニルアゾ置換基をもつイオン液体の創製とそのフォトクロミック反応 (2009)
  • Author(s): 河森大樹, 浅香亨, 文字群生, 赤井伸行, 河合明雄, 渋谷一彦
  • Organizer: 光化学討論会
  • Place of Presentation: 群馬大学
  • Year and Date: 2009-09-16
• [Presentation] Spin polarization created at the quenching of photo-excited tryptophan by free radicals in solution and at protein surfaces (2009)
  • Author(s): Akio Kawai, Shuichi Mori, Kazuhiko Shibuya
  • Organizer: International Conference on Magnetic Field and Spin Effects in Chemistry and Related Phenomena.
  • Place of Presentation: Brock University, Canada
  • Year and Date: 2009-08-10
• [Presentation] Photoand thermal-isomerization reactions of phenylazo substituted ionic liquids (2009)
  • Author(s): Akio Kawai, Kazuhiko Shibuya
  • Organizer: Mejiro One-day Symposium on Ionic Liquids- Structure and Dynamics
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2009-06-30
• [Presentation] Photo-and thermal-isomerization reactions of phenylazo substituted ionic liquids (2009)
  • Author(s): Akio Kawai, Kazuhiko Shibuya
  • Organizer: Mejiro One-day Symposium on Ionic Liquids-Structure and Dynamics
  • Place of Presentation: 学習院大学
  • Year and Date: 2009-06-30
• [Presentation] イオン液体の分光とダイナミクス～低融点な塩の特性をさぐる～ (2009)
  • Author(s): 河合明雄
  • Organizer: 第3回分子科学会シンポジウム
  • Place of Presentation: 東京工業大学
  • Year and Date: 2009-06-12
• [Presentation] オキシムエステル構造をもつ化合物の光分解生成ラジカルの時間分解EPR観測 (2009)
  • Author(s): 河合明雄, 三宅祐輔, 岩間真木, 赤井伸行, 渋谷一彦, 中島康雄, 盛島泰正, 岡田光範
  • Organizer: 日本化学会春季年会
  • Place of Presentation: 日本大学(船橋市)
  • Year and Date: 2009-03-29
• [Presentation] Spin polarization created at the quenching of photo-excited tryptophan by free radicals in solution and at protein surfaces (2009)
  • Author(s): Akio Kawai, Shuichi Mori, Kazuhiko Shibuya
  • Organizer: 11th International Symposium on Spin and Magnetic Field Effects in Chemistry and Related Phenomena
  • Place of Presentation: St. Catherines, Canada
• [Presentation] イオン液体中における一重項酸素(^1△_g)生成と電子スピン分極 (2008)
  • Author(s): 河合明雄, 塩崎雄大, 三宅祐輔, 赤井伸行, 渋谷一彦
  • Organizer: 第47回電子スピンサイエンス学会
  • Place of Presentation: 九州大学(福岡市)
  • Year and Date: 2008-10-02
• [Presentation] イオン液体中における酸素分子拡散と一重項酸素(^1△_g)の寿命 (2008)
  • Author(s): 河合明雄, 塩崎雄大, 赤井伸行, 渋谷一彦
  • Organizer: 第2回分子科学討論会
  • Place of Presentation: 福岡国際会議場(福岡市)
  • Year and Date: 2008-09-24
• [Presentation] フェニルアゾ置換基をもつイオン液体の光異性化反応 (2008)
  • Author(s): 浅香 亨, 赤井 伸行, 河合 明雄, 渋谷 一彦
  • Organizer: 光化学討論会2008
  • Place of Presentation: 大阪府立大学(堺市)
  • Year and Date: 2008-09-11
• [Presentation] パルスESR法によるリン中心ラジカルのオリゴマーへの付加反応観測 (2008)
  • Author(s): 三宅祐輔、赤井伸行・河合明雄・渋谷一彦・中島康雄・盛島泰正・岡田光範
  • Organizer: 日本化学会 春季年会
  • Place of Presentation: 立教大学(東京)
  • Year and Date: 2008-03-30
• [Presentation] Solvation and diffusion dynamics of paramagnetic molecules in ionic liquids as studied by EPR spectroscopy (2008)
  • Author(s): Akio Kawai, Takehiro Hidemori, Yusuke Miyake, Kazuhiko Shibuya
  • Organizer: International Symposium on Structure and Dynamics of ionic liquids in Kanazawa
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Slow rotational motion of triplet porphyrin dimer in ionic liquids at room temperature as studied by time-resolved EPR spectroscopy (2007)
  • Author(s): Akio Kawai, Yusuke Miyake, Takehiro Shiozaki, Tohru Asaka, Takehiro Hidemori, Nobuyuki Akai, Kazuhiko Shibuya
  • Organizer: A Joint Conference of the International Symposium on Electron Spin Science and the 46th Annual Meeting of the Society of Electron Spin Science and Technology
  • Place of Presentation: Shizuoka, Japan
• [Presentation] Local solvated structure and slow rotational motion of paramagnetic molecules in room temperature ionic liquid (2007)
  • Author(s): Akio Kawai, Takehiro Hidemori, Yusuke Miyake, Tohru Asaka, Kazuhiko Shibuya
  • Organizer: 2nd International congress on ionic liquid
  • Place of Presentation: Yokohama, Japan
• [Presentation] Rotational motion of photochemical intermediate paramagnetic molecules (2007)
  • Author(s): Akio Kawai, Takehiro Hidemori, Yusuke Miyake, Tohru Asaka, Kazuhiko Shibuya
  • Organizer: Structure and Dynamics of ionic liquid
  • Place of Presentation: Chiba, Japan
• [Presentation] CIDEP study on the quenching of singlet oxygen molecule by free radicals (2007)
  • Author(s): Akio Kawai, Takahito Fuse, Hajime Terazono, Kazuhiko Shibuya
  • Organizer: IIX International Symposium on Magnetic Field and Spin Effects in Chemistry and Related Phenomena
  • Place of Presentation: Venice, Italy
• [Remarks] 強光子場科学研究懇談JILS Newsletterに2009年2月に行った講演内容が掲載
  • URL: http://www.jils.jp/