キハラ ノブヒロ   Kihara Nobuhiro
  木原 伸浩
   所属   神奈川大学  理学部 化学科
   職種   教授
言語種別 英語
発行・発表の年月 2005/06
形態種別 学術雑誌
査読 査読あり
標題 Syntheses of [60]fullerene and N,N-bis(4-biphenyl)aniline-tethered rotaxane: Photoinduced electron-transfer processes via singlet and triplet states of [60]fullerene
執筆形態 共著
掲載誌名 Bull. Chem. Soc. Jpn.
巻・号・頁 78(6),pp.1008-1017
著者・共著者 Atula S. D. Sandanayaka, Kei-ichiro Ikeshita, Nobuhiro Watanabe, Yasuyuki Araki, Yoshio Furusho, Nobuhiro Kihara, Toshikazu Takata, Osamu Ito
概要 A rotaxane contg. [60]fullerene (C60) and N,N-bis(4-biphenyl)aniline (BBA) moieties was synthesized. The intra-rotaxane photoinduced electron-transfer processes of the [C60]fullerene and BBA moieties were investigated. Time-resolved transient absorption measurements of the rotaxanes confirmed that the long-lived charge-sepd. state (C60·-; BBA·+)rotaxane was formed via both the excited singlet and triplet states of C60 (1C60* and 3C60*, resp.) in polar solvents. The rate consts. for charge-sepn. process were evaluated to be in the range of (3.6-3.7) × 108 s-1 via 1C60* and (5.1-5.6) × 107 s-1 via 3C60* in the ratio of (0.36-0.38):(0.43-0.51). The rate consts. of charge recombination were 2.5 × 106 s-1 and 4.4 × 106 s-1. The activation free-energy changes of charge-sepn. process via 3C60* were evaluated to be 0.10 eV, while those of the charge-recombination process were estd. to be 0.03 eV in THF and benzonitrile.
DOI 10.1246/bcsj.78.1008
ISSN 0009-2673