イワクラ イズミ   Iwakura Izumi
  岩倉 いずみ
   所属   神奈川大学  工学部 化学教室
    神奈川大学大学院  工学研究科 工学専攻(応用化学領域)
   職種   教授
言語種別 英語
発行・発表の年月 2018/08
形態種別 学術雑誌
査読 査読あり
標題 Direct observation of the change in transient molecular structure of 9,9'-bianthryl using a 10 fs pulse UV laser
執筆形態 共著
掲載誌名 Chemical Physics
掲載区分国外
出版社・発行元 Elsevier
巻・号・頁 512,pp.128-134
著者・共著者 Sena Hashimoto, Atsushi Yabushita, Takayoshi Kobayashi, Kotaro Okamura, Izumi Iwakura*
概要 Photoexcitation of 9,9'-bianthryl has been considered to produce a locally excited (LE) state and then a charge transfer (CT) state by intramolecular charge transfer (ICT) in polar solvents. In contrast, the CT state is considered to be unstable in non-polar solvents and triggers a dipole flip-flop between the two anthracene rings. The central CC bond between the two anthracene rings is considered to twist during relaxation in the LE state and CT state, and this was visualized in the present work using an ultrashort ultraviolet (UV) pulse. The CC stretching frequency was recovered in a period of ca. 500 fs, which implies that the CC bond undergoes repeated torsion back and forth in the electronic excited state. Investigation of samples in a polar solvent and a non-polar solvent indicated that ICT does not affect the torsion around the central CC bond.
researchmap用URL https://www.sciencedirect.com/science/article/pii/S0301010417308285