A new family of dinuclear Ru(II) polypyridyl complexes containing dibenzo-14-crown-4

Three novel bis(bidentate) ligands derived from dibenzo-14-crown-4, and corresponding bimetallic Ru(II) complexes have been synthesized. These complexes exhibit one Ru(II)-centered reversible oxidation and three ligand-centered reductions, show characteristic MLCT absorption band at 445-454 nm and emission at 575-592 nm.