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 2010/04
形態種別 学術雑誌
査読 査読あり
標題 Axle Length Effect on Photoinduced Electron Transfer in Triad Rotaxane with Porphyrin, [60]Fullerene, and Triphenylamine
執筆形態 共著
掲載誌名 J. Phys. Chem. A
巻・号・頁 114(16),pp.5242-5250
著者・共著者 Atula S. D. Sandanayaka, Hisahiro Sasabe, Yasuyuki Araki, Nobuhiro Kihara, Yoshio Furusho, Toshikazu Takata, Osamu Ito
概要 In this rotaxane, zinc porphyrin (ZnP) with a crown-ether necklace is employed as a photosensitized electron donor; through the crown-ether, a short axle with C60 and triphenylamine (TPA) at both terminals is penetrating as an electron acceptor and a hole-shift, resp. (abbreviated as (ZnP;C60-(AS)-TPA)Rot). The time-resolved fluorescence and transient absorption measurements reveal that the through-space electron-transfer processes take place via the excited states of the ZnP unit to the spatially arranged C60 moiety, giving the radical ion pair (ZnP·+;C60·--(AS)-TPA)Rot in polar solvents. Consecutively, (ZnP;C60·--(AS)-TPA·+)Rot is also generated by the through-space hole-shift between ZnP and TPA, in addn. to the through-bond charge sepn. via the excited state of the C60 moiety. Both radial ion pairs have lifetimes of 320-420 ns, which are longer than those of the previously reported similar rotaxane with cationic longer axle (150-170 ns).
DOI 10.1021/jp911177q
ISSN 1089-5639