Mononuclear and binuclear ruthenium(III) polypyridyl complexes containing 2,6-bis(2′-benzimidazyl)-pyridine as co-ligand: Synthesis, spectroscopic properties and redox activity

Abstract

A series of complexes of the general formula [Ru Hbbip X Cl]+, [Ru Hbbip (X)2]2+ and [(Ru Hbbip X)2 pyz]3+; H2bbip = 2,6-bis-(2′-benzimidazyl) pyridine; pyz = pyrazine and X = 2.2′-bipyridine/1,10-phenanthroline have been synthesized and characterized by their elemental analysis, spectral (IR, 1H NMR, UV-visible and ESR) and redox data. Comparative luminescent behaviour of the complexes in the presence and absence of calf-thymus DNA has also been studied.