Ultrafast Dynamics and Mechanisms of Photochromic Reactions
| Project Area | New Horizons of Photochromism: Customized Molecular Design and Novel Applications |
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| Project/Area Number |
19050006
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Osaka University |
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Principal Investigator |
MIYASAKA Hiroshi Osaka University, 大学院・基礎工学研究科, 教授 (40182000)
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| Project Period (FY) |
2007 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥40,500,000 (Direct Cost: ¥40,500,000)
Fiscal Year 2010: ¥9,600,000 (Direct Cost: ¥9,600,000)
Fiscal Year 2009: ¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 2008: ¥9,600,000 (Direct Cost: ¥9,600,000)
Fiscal Year 2007: ¥11,200,000 (Direct Cost: ¥11,200,000)
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| Keywords | フェムト秒分光 / ピコ秒分光 / 多光子過程 / フォトクロミズム / 光化学反応 / フェムト秒ダイナミクス / コヒーレント振動 / 環開閉反応 / 多光子反応 / レーザー反応制御 / 超高速分光 / ジアリールエテン / 振動移送緩和 / 6π電子系 |
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| Research Abstract |
In order to elucidate the dynamics and mechanisms of photochromic reactions of organic molecular systems, a detection system with ultrafast time resolution <20 fs was constructed. Cyclization and cycloreversion dynamics and their relation to intramolecular low-frequency vibrations were elucidated. In addition, it was revealed that the stepwise two-photon absorption can open the effective cycloreversion channel (>2500 times compared to the one-photon process) in specific higher excited states un-accessible via one-photon absorption from the ground state. By using a near IR femtosecond laser pulse at 1.28μm with an optical microscope, one-color reversible control of the cyclization (simultaneous 3-photon absorption) and the cycloreversion (simultaneous 2-photon absorption) was attained.
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Report
(6 results)
Research Products
(60 results)
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[Journal Article] One-Color Reversible Control of Photochromic Reactions in a Diarylethene Derivative : Three-photon Cyclization and Two-Photon Cycloreversion by Near IR Femtosecond Laser Pulse at 1.28 μm.2011
Author(s)
K.Mori, Y.Ishibashi, H.Matsuda, S.Ito, Y.Nagasawa, H.Nakagawa, K.Uchida, S.Yokojima, S.Nakamura, M.Irie, H.Miyasaka
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Journal Title
J.Am.Chem.Soc.
Volume: 133
Pages: 2621-2625
Related Report
Peer Reviewed
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[Journal Article] Ultrafast Photodissociation Dynamics of a Hexaarylbi- imidazole Derivative with Pyrenyl Groups2009
Author(s)
H. Miyasaka, Y. Satoh, Y. Ishibashi, S. Ito, Y. Nagasawa, S. Taniguchi, H. Chosrowjan, N. Mataga, D. Kato, A. Kikuchi, J. Abe
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Journal Title
J. Am. Chem. Soc. 131[21]
Pages: 7256-7263
Related Report
Peer Reviewed
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[Journal Article] Ultrafast Photodissociation Dynamics of a Hexaarylbiimidazole Derivative with Pyrenyl Groups : Dispersive Reaction from Femtosecond to Ten Nanosecond Time Regions2009
Author(s)
H.Miyasaka, Y.Satoh, Y.Ishibashi, S.Ito, Y.Nagasawa, S.Taniguchi, H.Chosrowjan, N.Mataga, D.Kato, A.Kikuchi, J.Abe
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Journal Title
J.Am.Chem.Soc. 131
Pages: 7256-7263
Related Report
Peer Reviewed
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[Journal Article] Systematic Synthesis, Isolation, and Photophysical Properties of Linear-shaped Re(I)Oligomers and Polymers with 2-20 units2008
Author(s)
Y. Yamamoto, S. Sawa, Y. Funada, T. Morimoto, M. Falkenstrom, H. Miyasaka, S. Shishido, T. Ozeki, K. Koike, O.Ishitani
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Journal Title
J. Am. chem. Soc 130
Pages: 14659-14674
Related Report
Peer Reviewed
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[Journal Article] Laser photolysis study on photochromic reactions of a hexaarylbiimidazole derivative.2007
Author(s)
Y.Satoh, Y.Ishibashi, S.Ito, Y.Nagasawa, HMiyasaka, H.Chosrowjan, S.Taniguchi, N.Mataga, D.Kato, A.Kikuchi, J.Abe
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Journal Title
Chem.Phys.Lett. 448[4-6]
Pages: 228-231
Related Report
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[Journal Article] Laser Photolysis Study on Photochromic Reactions of a Hexaarylbiimidazole Derivative.2007
Author(s)
Y. Satoh, Y. Ishibashi, S. Ito, Y. Nagasawa, H. Miyasaka, H. Chosrowjan, S. Taniguchi, N. Mataga, D. Kato, A. Kikuchi, J. Abe
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Journal Title
J. Phy. Org. Chem. 20
Pages: 953-959
Related Report
Peer Reviewed
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[Book] Construction of Micro-Spectroscopic Systems and their Application to the DetectDynamics in a Small Domain(Wiley-VCH)2009
Author(s)
Syoji Ito, Hirohisa Matsuda, Takashi Sugiyama, Naoki Toitani, Yutaka Nagasawa, Hiroshi Miyasaka, in Molecular Nano Dynamics, Eds. H. Fukumura, M. Irie, Y. Iwasawa, H.Masuhara, K.Uosaki
Publisher
Wiley-VCH, Weinheim
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