Photochemical or thermal chelate exchange in the ruthenium coordination sphere of complexes of the Ru(phen)(2)L family (L = diimine or dinitrile ligands).
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.
Baranoff
Etienne
E
Laboratoire de Chimie Organo-Minérale, UMR 7513 du CNRS, Université Louis Pasteur, Faculté de Chimie, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France.
Collin
Jean-Paul
JP
Furusho
Junko
J
Furusho
Yoshio
Y
Laemmel
Anne-Chantal
AC
Sauvage
Jean-Pierre
JP