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Updated: May 23, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Light-driven water oxidation with a molecular tetra-cobalt(III) cubane cluster
Giuseppina La Ganga1, Fausto Puntoriero, Sebastiano Campagna
1Dipartimento 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.
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.
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