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
形態種別 学術雑誌
査読 査読あり
標題 Photoinduced electron- and energy-transfer processes of [60]fullerene covalently bonded with one and two zinc porphyrin(s): Effects of coordination of pyridine and diazabicyclooctane to Zn atom
執筆形態 共著
掲載誌名 J. Mater. Chem.
巻・号・頁 15(23),pp.2276-2287
著者・共著者 Atula S. D. Sandanayaka, Kei-ichiro Ikeshita, Yasuyuki Araki, Nobuhiro Kihara, Yoshio Furusho, Toshikazu Takata, and Osamu Ito
概要 C60-zinc porphyrin (ZnP) dyad (ZnP-C60) and triad (ZnP-C60-ZnP) were synthesized. Upon excitation of the ZnP moiety, charge sepn. via an excited singlet state of ZnP takes place competitively with energy transfer to C60 generating the excited singlet state of C60, from which charge-sepd. states (ZnP·+-C60·- and ZnP·+-C60·--ZnP) are also generated in polar solvents. Rates and efficiencies of energy transfer and charge sepn. for the triad are higher than those of the dyad. The generated charge-sepd. species recombine with lifetimes in the rage of 240-330 ns in polar solvents such as DMF, PhCN, and THF for both dyad and triad. In o-dichlorobenzene, although the lifetimes of charge-sepd. states are very short (<20 ns), coordination of DABCO and pyridine to ZnP in the dyad and triad producing relatively stable coordinated complexes gives rise to prolongation of the charge-sepd. states up to 460 ns.
DOI 10.1039/b500030k
ISSN 0959-9428