title: An efficient Ru(II) -Rh(III) -Ru(II) polypyridyl photocatalyst for visible-light-driven hydrogen production in aqueous solution.
abstract: The development of multicomponent molecular systems for the photocatalytic reduction of water to hydrogen has experienced considerable growth since the end of the 1970s. Recently, with the aim of improving the efficiency of the catalysis, single-component photocatalysts have been developed in which the photosensitizer is chemically coupled to the hydrogen-evolving catalyst in the same molecule through a bridging ligand. Until now, none of these photocatalysts has operated efficiently in pure aqueous solution: a highly desirable medium for energy-conversion applications. Herein, we introduce a new ruthenium-rhodium polypyridyl complex as the first efficient homogeneous photocatalyst for H2 production in water with turnover numbers of several hundred. This study also demonstrates unambiguously that the catalytic performance of such systems linked through a nonconjugated bridge is significantly improved as compared to that of a mixture of the separate components.
authors.affiliation: Université Joseph Fourier Grenoble 1/CNRS, Département de Chimie Moléculaire, UMR 5230, Institut de Chimie Moléculaire de Grenoble, FR-CNRS-2607, Laboratoire de Chimie Inorganique Rédox, BP 53, 38041 Grenoble Cedex 9 (France).
authors.forename: Thibaut
authors.initials: T
authors.lastname: Stoll
authors.forename: Marcello
authors.initials: M
authors.lastname: Gennari
authors.forename: Jérôme
authors.initials: J
authors.lastname: Fortage
authors.forename: Carmen E
authors.initials: CE
authors.lastname: Castillo
authors.forename: Mateusz
authors.initials: M
authors.lastname: Rebarz
authors.forename: Michel
authors.initials: M
authors.lastname: Sliwa
authors.forename: Olivier
authors.initials: O
authors.lastname: Poizat
authors.forename: Fabrice
authors.initials: F
authors.lastname: Odobel
authors.forename: Alain
authors.initials: A
authors.lastname: Deronzier
authors.forename: Marie-Noëlle
authors.initials: MN
authors.lastname: Collomb
keywords: homogeneous photocatalysis; hydrogen; photocatalysts; rhodium; water chemistry