Diastereoisomers as probes for solvent reorganizational effects on IVCT in dinuclear ruthenium complexes

IVCT solvatochromism studies on the diastereoisomeric forms of [{Ru(bpy)2}2(μ-dbneil)]5+ and [{Ru(pp)2}2(μ-bpm)]5+ {dbneil = dibenzoeilatin; pp = substituted derivatives of 2,2′-bipyridine and 1,10-phenanthroline} revealed that the subtle and systematic changes in the nature of the clefts by the variation of the bridging ligand, and the judicious positioning of substituents on the terminal ligands, profoundly influenced the magnitude of the reorganizational energy contribution to the electron transfer barrier.