title: Photochemical or thermal chelate exchange in the ruthenium coordination sphere of complexes of the Ru(phen)(2)L family (L = diimine or dinitrile ligands).
abstract: Complexes of the type Ru(phen)(2)L(2+), where L is a substituted bipyridine family member, have been prepared, and their photochemical substitution reactions have been investigated. In the presence of a bis-benzonitrile derivative, acting as a bidentate chelate, photoexpulsion of L is performed under the action of visible light, with quantitative formation of new complexes of the type Ru(phen)(2)L'(2+) (L' = bis-nitrile ligand). Several complexes have been characterized by X-ray crystallography. In particular, the bis-benzonitrile complexes could be crystallized, and the structure of these compounds, containing a 13-, 14-, or 15-membered metal incorporating ring, was obtained. By heating Ru(phen)(2)L'(2+) with a bipy derivative in refluxing ethylene glycol, quantitative formation of the starting complex [Ru(phen)(2)L(2+)] was carried out. The present series of compounds presents properties that could be profitably used in the design and construction of multicomponent systems acting as photochemically driven molecular machines.
authors.affiliation: Laboratoire de Chimie Organo-Minérale, UMR 7513 du CNRS, Université Louis Pasteur, Faculté de Chimie, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France.
authors.forename: Etienne
authors.initials: E
authors.lastname: Baranoff
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Collin
authors.forename: Junko
authors.initials: J
authors.lastname: Furusho
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Furusho
authors.forename: Anne-Chantal
authors.initials: AC
authors.lastname: Laemmel
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Sauvage