Synthesis of enantiomers of mononuclear Ru(II) complexes with 10,13-diaryl substituted dppz ligands

An array of enantiomerically pure mononuclcear [Ru(bpy)2(dppz)]2 + derivatives with 10,13-diaryl substituted dppz ligand has been synthesized and characterized (bpy = bipyridine, dppz = pyrido-[3,2-a:2′,3′-c]phenazine). These new complexes exhibit substantially similar absorption spectra, resembling the parent complex [Ru(bpy)2(dppz)]2 +, and the enantiomerically pure analogues show the similar CD spectra in buffer solution despite the structural difference.