title: A Ruthenium Complex-Porphyrin-Fullerene-Linked Molecular Pentad as an Integrative Photosynthetic Model.
abstract: A ruthenium complex, porphyrin sensitizer, fullerene acceptor molecular pentad has been synthesized and a long-lived hole-electron pair was achieved in aqueous solution by photoinduced multistep electron transfer: Upon irradiation by visible light, the excited-state of a zinc porphyrin (1ZnP*) was quenched by fullerene (C60) to afford a radical ion pair,1,3(ZnP.+-C60.-). This was followed by the subsequent electron transfer from a water oxidation catalyst unit (RuII) to ZnP.+to give the long-lived charge-separated state, RuIII-ZnP-C60.-, with a lifetime of 14 μs. The ZnP worked as a visible-light-harvesting antenna, while the C60acted as an excellent electron acceptor. As a consequence, visible-light-driven water oxidation by this integrated photosynthetic model compound was achieved in the presence of sacrificial oxidant and redox mediator.
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: Department of Chemistry, Ångström Laboratory, Uppsala University, Box 532, 75120, Uppsala, Sweden.
authors.forename: Jens
authors.initials: J
authors.lastname: Föhlinger
authors.affiliation: Department of Chemistry, Ångström Laboratory, Uppsala University, Box 532, 75120, Uppsala, Sweden.
authors.forename: Jonas
authors.initials: J
authors.lastname: Petersson
authors.affiliation: Department of Chemistry, Ångström Laboratory, Uppsala University, Box 532, 75120, Uppsala, Sweden.
authors.forename: Leif
authors.initials: L
authors.lastname: Hammarström
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.|Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.
authors.forename: Hiroshi
authors.identifier: 0000-0003-3506-5608
authors.initials: H
authors.lastname: Imahori
keywords: artificial photosynthesis; fullerenes; molecular pentads; photoinduced electron transfer; porphyrins; ruthenium