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

摘要

Three bis(bidentate)ligands cis-di(4,5-diazafluoren-9-ylimino)dibenzo-14-crown-4(BL~1),trans-di-(4,5-diazafluoren-9-ylimino)dibenzo-14-crown-4(BL2),and 1,4,8,11-tetraoxacyclotetradecyl[2,3:9,10]-bis-dipyrido[3,2-a:2'3'-c]phenazine(BL3),and corresponding bimetallic Ru(II)complexes[(bpy)2RuBL~(1-3)Ru(bpy)2](PF6)4(Ru-BL~(1-3))have been synthesized.Cyclic voltammetry of these complexes are consistent with one Ru(II)-centered reversible oxidation and three ligand-centered reductions.These complexes show metal-to-ligand charge transfer absorption at 445-454 nm and emission at 575-592 nm.