title: Chemical and Photochemical Water Oxidation Mediated by an Efficient Single-Site Ruthenium Catalyst.
abstract: Water oxidation is a fundamental step in artificial photosynthesis for solar fuels production. In this study, we report a single-site Ru-based water oxidation catalyst, housing a dicarboxylate-benzimidazole ligand, that mediates both chemical and light-driven oxidation of water efficiently under neutral conditions. The importance of the incorporation of the negatively charged ligand framework is manifested in the low redox potentials of the developed complex, which allows water oxidation to be driven by the mild one-electron oxidant [Ru(bpy)3]3+(bpy=2,2'-bipyridine). Furthermore, combined experimental and DFT studies provide insight into the mechanistic details of the catalytic cycle.
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Ahmed F
authors.initials: AF
authors.lastname: Abdel-Magied
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Andrey
authors.initials: A
authors.lastname: Shatskiy
authors.affiliation: Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Rong-Zhen
authors.initials: RZ
authors.lastname: Liao
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Tanja M
authors.initials: TM
authors.lastname: Laine
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.|Chemistry Department, Faculty of Science, Fayoum University, PO Box 63514, Fayoum, Egypt.
authors.forename: Wael A A
authors.initials: WA
authors.lastname: Arafa
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Per E M
authors.initials: PE
authors.lastname: Siegbahn
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Markus D
authors.identifier: http://orcid.org/0000-0002-6089-5454
authors.initials: MD
authors.lastname: Kärkäs
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Björn
authors.initials: B
authors.lastname: Åkermark
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Eric V
authors.initials: EV
authors.lastname: Johnston
mesh_terms: D002384:Catalysis; D008958:Models, Molecular; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D011789:Quantum Theory; D012428:Ruthenium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D012428:Ruthenium
keywords: electrochemistry; homogeneous catalysis; photochemistry; ruthenium; water oxidation