title: A Co(II)-Ru(II) dyad relevant to light-driven water oxidation catalysis.
abstract: Artificial photosynthesis aims at efficient water splitting into hydrogen and oxygen, by exploiting solar light. As a priority requirement, this process entails the integration of suitable multi-electron catalysts with light absorbing units, where charge separation is generated in order to drive the catalytic routines. The final goal could be the transposition of such an asset into a photoelectrocatalytic cell, where the two half-reactions, proton reduction to hydrogen and water oxidation to oxygen, take place at two appropriately engineered photoelectrodes. We herein report a covalent approach to anchor a Co(II) water oxidation catalyst to a Ru(II) polypyridine photosensitizer unit; photophysical characterisation and the catalytic activity of such a dyad in a light activated cycle are reported, and implications for the development of regenerative systems are discussed.
authors.affiliation: ITM-CNR and Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy. andrea.sartorel@unipd.it.
authors.forename: Alejandro Montellano
authors.initials: AM
authors.lastname: López
authors.forename: Mirco
authors.initials: M
authors.lastname: Natali
authors.forename: Erica
authors.initials: E
authors.lastname: Pizzolato
authors.forename: Claudio
authors.initials: C
authors.lastname: Chiorboli
authors.forename: Marcella
authors.initials: M
authors.lastname: Bonchio
authors.forename: Andrea
authors.initials: A
authors.lastname: Sartorel
authors.forename: Franco
authors.initials: F
authors.lastname: Scandola
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry; D008027:Light; D010084:Oxidation-Reduction; D017319:Photosensitizing Agents / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D017319:Photosensitizing Agents; D014867:Water; D003035:Cobalt; D012428:Ruthenium