title: Photocatalytic water oxidation by molecular assemblies based on cobalt catalysts.
abstract: Chromophore-catalyst molecular assemblies towards visible light-driven water oxidation were synthesized by covalent integration of a light-harvesting complex [Ru(bpy)3](2+) (bpy=2,2'-bipyridine) and a Co4O4 cubane water oxidation catalyst. The two components were assembled either in linear or macrocyclic configurations. In the presence of the sacrificial reagent, the Ru-Co metallocycle exhibits remarkable photocatalytic activity for oxygen evolution, which is one order of magnitude higher than that of a multicomponent system and exceeds that of a linear assembly by a factor of five, offering access to highly active photocatalyst through molecular design.
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology (DUT), DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian 116024 (PR China), Fax: (+86) 411-84986245.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhou
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Li
authors.forename: Biaobiao
authors.initials: B
authors.lastname: Zhang
authors.forename: Fengshou
authors.initials: F
authors.lastname: Yu
authors.forename: Licheng
authors.initials: L
authors.lastname: Sun
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D003035:Cobalt
keywords: cobalt; cubanes; homogeneous catalysis; photocatalysis; water splitting