Jean-Paul Collin, Robert Kayhanian, Jean-Pierre Sauvage, Giuseppe Calogero, Francesco Barigelletti, André De Cian and Jean Fischer
Two cyclometallated ruthenium(II) complexes incorporating mono- or di-substituted phenanthroline moieties are synthesized and characterized by single-crystal X-ray diffraction; the complex with a sterically hindered ligand displays a long-lived MLCT excited state.