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 2005/02
形態種別 学術雑誌
査読 査読あり
標題 Synthesis and photoinduced electron transfer processes of rotaxanes bearing [60]fullerene and zinc porphyrin: Effects of interlocked structure and length of axle with porphyrins
執筆形態 共著
掲載誌名 J. Phys. Chem. B
巻・号・頁 109(7),pp.2516-2525
著者・共著者 Atula S. D. Sandanayaka, Nobuhiro Watanabe, Kei-ichiro Ikeshita, Yasuyuki Araki, Nobuhiro Kihara, Yoshio Furusho, Osamu Ito, Toshikazu Takata
概要 Three rotaxanes, with axles with two zinc porphyrins (ZnPs) at both ends penetrating into a necklace pending a C60 moiety, were synthesized with varying interlocked structures and axle lengths. Charge-sepd. (CS) states (ZnP·+, C60·-)rotaxane are formed via the excited singlet state of ZnP (1ZnP*) to the C60 moiety in solvents such as benzonitrile, THF, and toluene. The rate consts. and quantum yields of charge sepn. via 1ZnP* decrease with axle length, but they are insensitive to solvent polarity. When the axle becomes long, charge sepn. takes place via the excited triplet state of ZnP (3ZnP*). The lifetime of the CS state increases with axle length from 180 to 650 ns at room temp. The small activation energies of charge recombination were evaluated by temp. dependence of electron-transfer rate consts., probably reflecting through-space electron transfer in the rotaxane structures.
DOI 10.1021/jp045831w
ISSN 1520-6106