• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Molecular dynamics of ultrashort-lived tautomers as transient species of chemical reactions

Research Project

Project/Area Number 19K05377
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionRitsumeikan University

Principal Investigator

Nagasawa Yutaka  立命館大学, 生命科学部, 教授 (50294161)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords超高速分光 / 時間分解分光 / 過渡吸収スペクトル / 光異性化 / 無輻射失活 / ソルバトクロミズム / 互変異性化 / コヒーレント振動 / 励起状態ダイナミクス / 電荷分離反応 / 核波束運動 / コヒーレンス / 電子移動 / フォトクロミズム / サーモクロミズム / 互変異生体 / 電荷移動 / 互変異性体 / 光異性化反応 / 超高速時間分解分光 / 縮退四光波混合
Outline of Research at the Start

この研究では、超短パルスレーザーを用いた時間分解非線形分光法を用いて短寿命互変異性体の研究を行います。パルスレーザーとは、高速な光フラッシュのようなもので、これにより化学反応の時間変化を測定する学問分野のことを時間分解分光学といいます。また、互変異性体とは、全体としての分子式は共通ですが、構造が微妙に異なる分子のことで、その分子構造は高速に変化します。互変異性体は化学反応の中間状態となり得るので、化学反応がどのように起こるか観測し、その反応メカニズムを解明するのがこの研究の目的です。

Outline of Final Research Achievements

The following two studies by femtosecond time-resolved transient absorption spectroscopy were published as peer reviewed papers.
1) A nonfluorescent solvatochromic dye, phenol blue, exhibits ultrafast nonradiative deactivation from the excited state. It was found that, in proton-donating solvents, when the absorbed light energy is released as heat during the nonradiative decay, the hydrogen bond with the solvent molecule is cleaved. [C. Ota, et al., J. Phys. Chem. B, 125, 10832 (2021)]
2) The photoisomerization reaction of indigo derivatives were studied, and it was clarified that the excited state of the cis-isomer is more unstable than that of the trans-isomer due to the Coulombic repulsion of adjacent C=O groups. Hence, the excited state lifetime of cis-form is shorter than that of the trans-form and the quantum yield of cis-to-trans isomerization is higher than that of the trans-to-cis isomerization. [Y. Kihara, et. al., J. Phys. Chem. B, 126, 3539 (2022)]

Academic Significance and Societal Importance of the Research Achievements

植物の光合成系では、光化学系Ⅱ反応中心において、水が酸化されて酸素が発生する。この際、水・アミノ酸残基間の水素結合がプロトン移動を媒介する。よって、光反応に付随した水素結合の挙動について検証することは非常に有意義な研究である。また、異性化反応は光合成とは直接の関連はないが、ハロバクテリアのの光エネルギー変換機構として、バクテリオロドプシンによるプロトンポンピングの素過程として重要である。現在、環境問題の観点から、火力や原子力に代わるエネルギー源の開発が急務となっているが、新たな効率的光エネルギー変換機構の開発には、光化学反応ダイナミクスの解明が重要であり、欠くことのできない基礎研究である。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (50 results)

All 2023 2022 2021 2020 2019

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results) Presentation (44 results) (of which Int'l Joint Research: 16 results)

  • [Journal Article] Red-Edge Effect of Auramine O in Saccharide Glasses2022

    • Author(s)
      長澤 裕、豊 淳史、田中 丈朝、石川 宙
    • Journal Title

      Cryobiology and Cryotechnology

      Volume: 68 Issue: 2 Pages: 49-53

    • DOI

      10.20585/cryobolcryotechnol.68.2_49

    • ISSN
      1340-7902, 2424-1555
    • Year and Date
      2022-10-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ultrafast Excited State Dynamics of Forward and Reverse trans-cis Photoisomerization of Red-Light-Absorbing Indigo Derivatives2022

    • Author(s)
      Yu Kihara, Shuntaro Tani, Yamato Higashi, Takahiro Teramoto, and Yutaka Nagasawa
    • Journal Title

      J. Phys. Chem. B

      Volume: 126 Issue: 19 Pages: 35393550-35393550

    • DOI

      10.1021/acs.jpcb.2c00248

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonradiative Decay and Vibrational Dephasing of Malachite Green in Trehalose Glass Monitored by Femtosecond Time-Resolved Transient Absorption Spectroscopy2021

    • Author(s)
      Atsushi Toyo, Keita Sugihara, and Yutaka Nagasawa
    • Journal Title

      Cryobiology and Cryotechnology

      Volume: 67 Issue: 2 Pages: 115-119

    • DOI

      10.20585/cryobolcryotechnol.67.2_115

    • NAID

      130008119838

    • ISSN
      1340-7902, 2424-1555
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ultrafast Dynamics of a Solvatochromic Dye, Phenol Blue: Tautomerization and Coherent Wavepacket Oscillations2021

    • Author(s)
      Ota Chikashi、Matsumoto Akifumi、Hidaka Tsubasa、Sugihara Keita、Teramoto Takahiro、Nagasawa Yutaka
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 38 Pages: 10832-10842

    • DOI

      10.1021/acs.jpcb.1c07501

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Excitation Energy Transfer from Bacteriochlorophyll b in the B800 Site to B850 Bacteriochlorophyll a in Light-Harvesting Complex 22021

    • Author(s)
      Saga Yoshitaka、Yamashita Madoka、Masaoka Yuto、Hidaka Tsubasa、Imanishi Michie、Kimura Yukihiro、Nagasawa Yutaka
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 8 Pages: 2009-2017

    • DOI

      10.1021/acs.jpcb.0c09605

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Excited State dynamics of charge transfer complexes of fullerenes in an electron donating solvent2020

    • Author(s)
      Yosuke Takahashi , Keita Sugihara , Yutaka Nagasawa
    • Journal Title

      Journal of Photochemistry & Photobiology, A: Chemistry

      Volume: 403 Pages: 112861-112861

    • DOI

      10.1016/j.jphotochem.2020.112861

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] ソルバトクロミズムを示す色素フェノールブルーの超高速無輻射失活過程と互変異性化2023

    • Author(s)
      長澤 裕、田中 丈朝、日髙 翼、松本 誠史、太田 周志、寺本 高啓
    • Organizer
      日本化学会第103春季年会(2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] SBP-β-NPのフォトクロミズムにおける温度依存性と励起波長依存性2023

    • Author(s)
      松中 由有、山本 哲也、日名子 一起、邨井 孝行、石川 宙、長澤 裕
    • Organizer
      日本化学会第103春季年会(2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] cis-N,N’-ジアセチルインジゴにおける光異性化反応のダイナミクスと温度依存性2023

    • Author(s)
      邨井 孝行、日名子 一起、山本 哲也、石川 宙、松中 由有、長澤 裕
    • Organizer
      日本化学会第103春季年会(2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] SBP-β-NPが示すフォトクロミズムの温度依存性2022

    • Author(s)
      山本 哲也、日名子 一起、松中 由有、木原 優、長澤 裕
    • Organizer
      第12回 CSJ化学フェスタ2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 可視光長波長領域に吸収帯を有するインジゴ誘導体のtrans-cis光異化性の超高速ダイナミクス2022

    • Author(s)
      長澤 裕、木原 優、谷 駿太郎、東 岳斗、寺本 高啓
    • Organizer
      第16回 分子科学討論会 2022横浜
    • Related Report
      2022 Annual Research Report
  • [Presentation] ポリマー中で超高速の無輻射失活を示す色素フェノールブルーの励起状態ダイナミクス2022

    • Author(s)
      田中丈朝、日名子一起、山本哲也、辻井遥、長澤裕
    • Organizer
      第16回 分子科学討論会 2022横浜
    • Related Report
      2022 Annual Research Report
  • [Presentation] ポリマー中にドープされた無蛍光性色素フェノールブルーの超高速無放射失活2022

    • Author(s)
      田中 丈朝、日名子 一起、辻井 遥、山本 哲也、長澤 裕
    • Organizer
      2022年光化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 電子供与性溶媒中でのフラーレン誘導体[60]PCBMの電荷移動錯体形成と光励起ダイナミクス2022

    • Author(s)
      辻井 遥、政岡 宥人、木原 優、日名子 一起、長澤 裕
    • Organizer
      2022年光化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ヘミインジゴ誘導体の超高速EーZ異性化反応2022

    • Author(s)
      東 岳斗、木原 優、日名子 一起、長澤 裕
    • Organizer
      2022年光化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 糖ガラス中の色素Auramine Oが示すred-edge効果2022

    • Author(s)
      豊 淳史、田中 丈朝、石川 宙、長澤 裕
    • Organizer
      第67回低温生物工学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] EーZ isomerization dynamics of photochromic hemiindigo derivatives2022

    • Author(s)
      Yamato Higashi, Yu Kihara, Kazuki Hinago, Yutaka Nagasawa
    • Organizer
      17th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ultrafast Nonradiative Deactivation Dynamics of Solvatochromic Dye Phenol Blue in Polymers2022

    • Author(s)
      Taketomo Tanaka, Kazuki Hinago, Haruka Tsujii, Tetsuya Yamamoto, Yutaka Nagasawa
    • Organizer
      17th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ポリマー中における無蛍光性色素フェノールブルーの超高速無輻射失活ダイナミクス2022

    • Author(s)
      田中丈朝、日名子一起、辻井遥、山本哲也、長澤裕
    • Organizer
      第43回光化学若手の会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ポリマー中における無蛍光性色素フェノールブルーの超高速無輻射失活ダイナミクス2022

    • Author(s)
      田中丈朝、日名子一起、辻井遥、山本哲也、長澤裕
    • Organizer
      日本化学会 第102春季年会(2022)
    • Related Report
      2021 Research-status Report
  • [Presentation] Excited state dynamics of trans-cis isomerization of indigo derivatives2021

    • Author(s)
      Yu Kihara, Yuto Masaoka, Tsubasa Hidaka, Keita Sugihara, Yutaka Nagasawa
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Comparison of Thermochromism and Photochromism of a Spiropyran derivative, SBP-β-NP2021

    • Author(s)
      Tetsuya Yamamoto, Yusuke Kasai, Yu Kihara, Yutaka Nagasawa
    • Organizer
      The 11th Asian Photochemistry Conference, APC 2020
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Photochromic E-Z isomerization dynamics of hemiindigo derivatives studied by time-resolve transient absorption spectroscopy2021

    • Author(s)
      Yamato Higashi, Yu Kihara, Kazuki Hinago, Yutaka Nagasawa
    • Organizer
      The 11th Asian Photochemistry Conference, APC 2020
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Time-resolved transient absorption studies of trans-cis isomerization dynamics of indigo derivatives2021

    • Author(s)
      Yu Kihara, Yamato Higashi, Shuntaro Tani, Yutaka Nagasawa
    • Organizer
      The 11th Asian Photochemistry Conference, APC 2020
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] SBP-β-NPのサーモクロミズムとフォトクロミズム2021

    • Author(s)
      山本 哲也,笠井 友輔,木原 優,長澤 裕
    • Organizer
      第15回分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] インジゴ誘導体のtrans-cis異性化フォトクロミズムのグローバル解析2021

    • Author(s)
      木原 優、東 岳斗、谷 駿太朗、長澤 裕
    • Organizer
      2021年光化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] コヒーレントな核波束運動をともなうヘミインジゴ誘導体の超高速E-Z異性化反応2021

    • Author(s)
      東 岳斗、木原 優、日名子 一起、長澤 裕
    • Organizer
      2021年光化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Excited state dynamics of trans→cis and cis→trans isomerization of an indigo derivative2021

    • Author(s)
      Yu Kihara, Yamato Higashi, Yuto Masaoka, Tsubasa Hidaka, Keita Sugihara, Yutaka Nagasawa
    • Organizer
      International Conference on Photochemistry (ICP2021)
    • Related Report
      2021 Research-status Report
  • [Presentation] Ultrafast nonradiative decay of a solvatochromic dye, phenol blue observed by femtosecond transient absorption spectroscopy2021

    • Author(s)
      Chikashi Ota, Akifumi Matsumoto, Tsubasa Hidaka, Keita Sugihara, Takahiro Teramoto, and Yutaka Nagasawa
    • Organizer
      International Conference on Photochemistry (ICP2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] E-Z isomerization dynamics of photochromic hemiindigo derivatives2021

    • Author(s)
      Yamato Higashi, Yu Kihara, Kazuki Hinago, Yutaka Nagasawa
    • Organizer
      Sixteenth International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermochromism and Photochromism of a Spiropyran derivative SBP-β-NP2021

    • Author(s)
      Tetsuya Yamamoto, Yusuke Kasai, Yu Kihara, Yutaka Nagasawa
    • Organizer
      Sixteenth International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamics of trans-cis isomerization of an indigo derivative studied by time-resolved transient absorption spectroscopy2021

    • Author(s)
      Yu Kihara, Shuntaro Tani, Yamato Higashi and Yutaka Nagasawa
    • Organizer
      Sixteenth International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] トレハロースガラス中の色素malachite greenの無輻射失活過程と振動位相緩和2021

    • Author(s)
      豊淳史, 杉原敬太, 長澤裕
    • Organizer
      第66回低温生物工学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] インジゴ誘導体のtrans→cis、cis→trans光異性化反応ダイナミクスの比較2020

    • Author(s)
      木原優、谷駿太朗、政岡宥人、日髙翼、長澤裕
    • Organizer
      2020年web光化学討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超高速時間分解分光によるヘミインジゴ誘導体の光異性化反応の解明2020

    • Author(s)
      木原優、谷駿太朗、政岡宥人、日髙翼、長澤裕
    • Organizer
      第10回 CSJ化学フェスタ 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 色素phenol blue類の超高速無輻射失活過程と互変異性化反応2020

    • Author(s)
      日高翼、杉原敬太、松本修史、太田周志、長澤裕
    • Organizer
      2020年web光化学討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] 部分的にB800を酸化したLH2の励起エネルギー移動メカニズム2020

    • Author(s)
      政岡宥人、日高翼、山下眞花、佐賀佳央、長澤裕
    • Organizer
      2020年web光化学討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] ソルバトクロミズムを示す色素phenol blue類の超高速無輻射失活過程と互変異性化反応2020

    • Author(s)
      日高 翼、杉原 敬太、松本 修史、太田 周志、長澤 裕
    • Organizer
      日本化学会 第100春季年会 (2020)
    • Related Report
      2019 Research-status Report
  • [Presentation] フォトクロミズムを示すヘミインジゴ誘導体の励起状態ダイナミクス2020

    • Author(s)
      木原 優、谷 駿太朗、長澤 裕
    • Organizer
      日本化学会 第100春季年会 (2020)
    • Related Report
      2019 Research-status Report
  • [Presentation] 短寿命金属錯体形成による対称型スピロピランのフォトクロミック制御2020

    • Author(s)
      笠井 友輔、長澤 裕
    • Organizer
      日本化学会 第100春季年会 (2020)
    • Related Report
      2019 Research-status Report
  • [Presentation] Substituent Effect on Photochromic Isomerization Reaction of Indigo Derivatives2019

    • Author(s)
      Shuntaro Tani, Yuto Masaoka, Tsubasa Hidaka, Keita Sugihara, Hirofumi Nakagawa, Yutaka Nagasawa
    • Organizer
      3rd International Solar Fuels Conference (ISF-3) and International Conference on Artificial Photosynthesis-2019 (ICARP2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Solvation Dynamics Accompanying Photoinduced Polarity Decrease of Betaine Dye2019

    • Author(s)
      Akira Iwamoto, Yusuke Yoneda, Hiroshi Miyasaka, Yutaka Nagasawa
    • Organizer
      3rd International Solar Fuels Conference (ISF-3) and International Conference on Artificial Photosynthesis-2019 (ICARP2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of electron donating and accepting substituents on the photochromism of indigo derivatives2019

    • Author(s)
      Shuntaro Tani, Keita Sugihara , Tsubasa Hidaka , Yuto Masaoka , Hirofumi Nakagawa , Yutaka Nagasawa
    • Organizer
      The 9th International Symposium on Photochromism (ISOP'2019 Paris)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] インドフェノールブルーの互変異性化反応:過渡吸収測定による研究2019

    • Author(s)
      日髙 翼,杉原 敬太,松本 誠史,長澤 裕
    • Organizer
      第13回分子科学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] ベタイン色素の光励起極性低下に伴う高速な動的Stokesシフト2019

    • Author(s)
      岩本 輝、米田 勇祐、宮坂 博、長澤 裕
    • Organizer
      2019年 光化学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] スピロピランのフォトクロミック金属錯体形成:熱反応によるキレート形成2019

    • Author(s)
      笠井 友輔 、谷 俊太朗 、長澤 裕
    • Organizer
      2019年 光化学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] インジゴ誘導体のフォトクロミック光異性化反応の置換基効果2019

    • Author(s)
      谷 駿太朗、政岡 宥人、日高 翼、杉原 敬太、中川 博史、長澤 裕
    • Organizer
      2019年 光化学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] Ultrafast Nonradiative Deactivation Process of Indophenol Blue Monitored by Femtosecond Transient Absorption Spectroscopy2019

    • Author(s)
      Tsubasa Hidaka, Keita Sugihara, Akifumi Matsumoto, Yutaka Nagasawa
    • Organizer
      15th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formation of Metal Complex with Short Lifetime by Photochromic Spiropyran2019

    • Author(s)
      Yusuke Kasai, Yutaka Nagasawa
    • Organizer
      15th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Photochromic Reaction of Indigo Derivatives: Observation of Isomerization by Femtosecond Transient Absorption Measurements2019

    • Author(s)
      Shuntaro Tani, Yuto Masaoka, Tsubasa Hidaka, Keita Sugihara, Hirofumi Nakagawa, Yutaka Nagasawa
    • Organizer
      15th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi