title: Remarkable Dependence of the Final Charge Separation Efficiency on the Donor-Acceptor Interaction in Photoinduced Electron Transfer.
abstract: The unprecedented dependence of final charge separation efficiency as a function of donor-acceptor interaction in covalently-linked molecules with a rectilinear rigid oligo-p-xylene bridge has been observed. Optimization of the donor-acceptor electronic coupling remarkably inhibits the undesirable rapid decay of the singlet charge-separated state to the ground state, yielding the final long-lived, triplet charge-separated state with circa 100% efficiency. This finding is extremely useful for the rational design of artificial photosynthesis and organic photovoltaic cells toward efficient solar energy conversion.
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Higashino
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Tomoki
authors.initials: T
authors.lastname: Yamada
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Masanori
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, 1-1-1- Umezono, Tsukuba, Ibaraki 305-8568 (Japan).|Present address: Institute of Technology and Science, Tokushima University, 2-1, Minamijosanjima-cho, Tokushima, 770-8506 (Japan).
authors.forename: Akihiro
authors.initials: A
authors.lastname: Furube
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O.Box 541, 33101 Tampere (Finland). nikolai.tkachenko@tut.fi.
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Tkachenko
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkoudai-cho, Nada-ku, Kobe 657-8501 (Japan).
authors.forename: Taku
authors.initials: T
authors.lastname: Miura
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkoudai-cho, Nada-ku, Kobe 657-8501 (Japan). ykobori@kitty.kobe-u.ac.jp.|PRESTO (Japan) Science and Technology Agency, Kawaguchi, Saitama 332-0012 (Japan). ykobori@kitty.kobe-u.ac.jp.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kobori
authors.affiliation: Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan).
authors.forename: Ryota
authors.initials: R
authors.lastname: Jono
authors.affiliation: Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan). yamasita@chemsys.t.u-tokyo.ac.jp.
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamashita
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan). imahori@scl.kyoto-u.ac.jp.|Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan). imahori@scl.kyoto-u.ac.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imahori
keywords: Marcus theory; charge separation; electron transfer; electronic coupling; exciplexes