title: Carbon dioxide reduction via light activation of a ruthenium-Ni(cyclam) complex.
abstract: In this paper we report the synthesis of a chromophore-catalyst assembly designed for the photoreduction of carbon dioxide. The chromophore unit is made up of a ruthenium trisbipyridyl-like unit covalently attached to a nickel cyclam (cyclam = 1,4,8,11-tetraazacyclotetradecane) via a triazole ring. The intramolecular electron transfer activation of the catalyst unit by visible light was studied by nanosecond flash photolysis and EPR spectroscopy. In aqueous solutions (pH = 6.5), activation of the Ru(II)-Ni(II) modular assembly with 450 nm visible light in the presence of a sacrificial electron donor accomplishes the reduction of CO2 into CO and H2 in a ratio of 2.7 to 1.
authors.affiliation: Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182, Univ. Paris-Sud and CNRS, F-91405 Orsay, France. Christian.Herrero@u-psud.fr Ally.Aukauloo@u-psud.fr.
authors.forename: Christian
authors.initials: C
authors.lastname: Herrero
authors.forename: Annamaria
authors.initials: A
authors.lastname: Quaranta
authors.forename: Sanae
authors.initials: S
authors.lastname: El Ghachtouli
authors.forename: Boris
authors.initials: B
authors.lastname: Vauzeilles
authors.forename: Winfried
authors.initials: W
authors.lastname: Leibl
authors.forename: Ally
authors.initials: A
authors.lastname: Aukauloo
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D008027:Light; D009682:Magnetic Resonance Spectroscopy; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D012428:Ruthenium / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D006571:Heterocyclic Compounds; D002245:Carbon Dioxide; C024560:cyclam; D009532:Nickel; D012428:Ruthenium