Manipulation of absorption maxima by controlling oxidation potentials in bis(tridentate) ru(ii) n-heterocyclic carbene complexes

Abstract

A series of seven Ru(II) complexes bearing NHC ligands have been synthesized. The electronic structures of these complexes were analysed by spectroscopic and electrochemical methods and further examined by theoretical calculations. Data show that absorption maxima are dependent on the HOMO level rather than the HOMO-LUMO gaps.