Ground- and excited-state properties of some ligand-bridged ruthenium(II) polypyridyl complexes with spectator-ligand-based emission

Abstract

From an examination of the absorption, luminescence and redox properties, the lowest excited state of the ligand-bridged polypyridyl complexes [{Ru(biq)₂}₂(dpp)]⁴⁺ and [(bipy)₂Ru(dpp)Ru(biq)₂]⁴⁺[dpp = 2,3-bis(2′-pyridyl)pyrazine, biq = 2,2′-biquinoline and bipy = 2,2′-bipyridine] is assigned to that of the charge-transfer type involving the spectator ligand biq.