Ultrafast Dynamics and Mechanisms of Photochromic Reactions.

2009 Fiscal Year Self-evaluation Report

• Project Area: New Horizons of Photochromism: Customized Molecular Design and Novel Applications
• Project/Area Number: 19050006
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Osaka University
• Principal Investigator: MIYASAKA Hiroshi Osaka University, 基礎工学研究科, 教授 (40182000)
• Project Period (FY): 2007 – 2010
• Keywords: フォトクロミズム / 超高速分光 / フェムト秒ダイナミクス / ジアリールエテン

Research Abstract

分子内振動のコヒーレンスや振動数の変化、その電子状態との相関を観測可能とする<30フェムト秒時間分解分光装置を作成・応用し、主に環開閉型のフォトクロミック化合物を対象に光反応挙動を実時間で測定し、結合切断・生成にいたる分子内反応の詳細な機構解明を目的としている。また、レーザー多光子吸収過程を利用した高位励起状態の生成とその緩和、反応過程の解明を含め、反応制御、電子状態緩和過程の総合的解明を目指して展開している。

Research Products

• [Journal Article] One- and Multi-photon Cycloreversion Reaction Dynamics of Diarylethene Derivative with Asymmetrical Structure, as Revealed by Ultrafast Laser Spectroscopy (2009)
  • Author(s): Y. Ishibashia, M. Mukaida, M. Falkenstrom, H. Miyasaka, S. Kobatake, M. Irie
  • Journal Title: Phys. Chem. Chem. Phys. 11[15] Pages: 2640-2648
  • Peer Reviewed
• [Journal Article] Ultrafast Photodissociation Dynamics of a Hexaarylbi- imidazole Derivative with Pyrenyl Groups (2009)
  • Author(s): H. Miyasaka, Y. Satoh, Y. Ishibashi, S. Ito, Y. Nagasawa, S. Taniguchi, H. Chosrowjan, N. Mataga, D. Kato, A. Kikuchi, J. Abe
  • Journal Title: J. Am. Chem. Soc. 131[21] Pages: 7256-7263
  • Peer Reviewed
• [Journal Article] Dynamics of Cyclization, Cycloreversion, and Multiphoton Gated Reaction of a Photochromic Diarylethene Derivative in Crystalline Phase (2008)
  • Author(s): K. Tani, Y. Ishibashi, H. Miyasaka, S. Kobatake, M. Irie
  • Journal Title: J. Phys. Chem. C 112[30] Pages: 11150-11157
  • Peer Reviewed
• [Presentation] Multiphoton Gated Photochromic Reaction In Diarylethene And Fulgide Derivatives (2009)
  • Author(s): H. Miyasaka
  • Organizer: 24th International Conference on Photochemistry
  • Place of Presentation: Toledo, Spain
  • Year and Date: 20090719-20090724
• [Book] 反応すれば形が変わるナノの世界～細胞から結晶まで～"、増原宏ら編(共著) (2009)
  • Author(s): 宮坂博
  • Total Pages: 87-96