研究者情報 | 神奈川大学

キハラ　ノブヒロ Kihara Nobuhiro 木原　伸浩所属神奈川大学理学部理学科神奈川大学大学院理学研究科理学専攻（化学領域）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