title: Light-driven water oxidation with a molecular tetra-cobalt(III) cubane cluster.
abstract: Photoinduced water oxidation to molecular oxygen takes place in systems made of [Ru(bpy)3]2+ (bpy = 2,2'-bipyridine) as the photosensitizer, [Co4O4(O2CMe)4(py)4] (py = pyridine) as the molecular catalyst and Na2S2O8 as the sacrificial electron acceptor. The photochemical quantum yield of the process reaches the outstanding value of 30% and depends on pH and catalyst concentration. Transient absorption spectroscopy experiments aimed to clarify the first events of the photocatalytic process are also reported.
authors.affiliation: Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (Sezione di Messina), Via Sperone 31, 98166 Messina, Italy.
authors.forename: Giuseppina
authors.initials: G
authors.lastname: La Ganga
authors.forename: Fausto
authors.initials: F
authors.lastname: Puntoriero
authors.forename: Sebastiano
authors.initials: S
authors.lastname: Campagna
authors.forename: Irene
authors.initials: I
authors.lastname: Bazzan
authors.forename: Serena
authors.initials: S
authors.lastname: Berardi
authors.forename: Marcella
authors.initials: M
authors.lastname: Bonchio
authors.forename: Andrea
authors.initials: A
authors.lastname: Sartorel
authors.forename: Mirco
authors.initials: M
authors.lastname: Natali
authors.forename: Franco
authors.initials: F
authors.lastname: Scandola
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry / Q000378:metabolism; D056831:Coordination Complexes / Q000737:chemistry / Q000378:metabolism; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008027:Light; D010084:Oxidation-Reduction / Q000528:radiation effects; D010100:Oxygen / Q000737:chemistry* / Q000378:metabolism; D010777:Photochemistry; D010782:Photolysis / Q000528:radiation effects; D017785:Photons; D014867:Water / Q000737:chemistry* / Q000378:metabolism
chemical_list: D056831:Coordination Complexes; D014867:Water; D003035:Cobalt; D015082:2,2'-Dipyridyl; D010100:Oxygen