title: Heptacoordinate CoIIComplex: A New Architecture for Photochemical Hydrogen Production.
abstract: The first heptacoordinate cobalt catalyst for light-driven hydrogen production in water has been synthesized and characterized. Photochemical experiments using [Ru(bpy)3]2+as photosensitizer gave a turnover number (TON) of 16300 mol H2(mol cat.)-1achieved in 2 hours of irradiation with visible (475 nm) light. This promising result provides a path forward in the development of new structures to improve the efficiency of the catalysis.
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Fiorella
authors.initials: F
authors.lastname: Lucarini
authors.affiliation: University of Lorraine and CNRS, SRSMC, TMS, France.
authors.forename: Mariachiara
authors.initials: M
authors.lastname: Pastore
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Serhii
authors.initials: S
authors.lastname: Vasylevskyi
authors.affiliation: École d'Ingénieurs et d'Architectes, Fribourg, Switzerland.
authors.forename: Massimo
authors.initials: M
authors.lastname: Varisco
authors.affiliation: Institut des Sciences et Ingénierie Chimique, École PolytechniqueFédérale de Lausanne (EPFL), Lausanne, Switzerland.
authors.forename: Euro
authors.initials: E
authors.lastname: Solari
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Aurelien
authors.initials: A
authors.lastname: Crochet
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Katharina M
authors.initials: KM
authors.lastname: Fromm
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Fabio
authors.initials: F
authors.lastname: Zobi
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
authors.forename: Albert
authors.identifier: http://orcid.org/0000-0003-2860-9080
authors.initials: A
authors.lastname: Ruggi
keywords: cobalt; heptacoordinate complex; hydrogen; photocatalysis; polypyridyl ligand