Ruthenium(II) complexes containing novel asymmetric tridentate ligands: synthesis, structure, electrochemicaland spectroscopic properties

摘要

Three novel asymmetrical tridentate ligands, 3-(1,10-phenanthrolin-2-yl)-5,6-diphenyl-as-triazine (dppt), 3-(1,10-phenanthrolin-2-yl0-as-triazino[5,6-f]acenaphthylene (pta) and 3-(1,10-phenanthrolin-2-yl)-as-triazino[5,6-f]pheanthrene (ptp) have been prepared. Their homoleptic ruthenium complexse [Ru(L)_2]~(2+) (L = dppt, pta or ptp) and hetroleptic ruthenium complexes [Ru(tpy)(L)]~(2+) have been synthesized and characterized by 1H NMR, ES-MS, electronic absorption spectrosocpy and cyclic voltammetry. The heteroleptic ruthenium complexes wre also characterized by X-ray crystallography. The electrochemical and spectroscopic studies of the complexes diaplay the changes inproperties in comparison with [Ru(tpy)_3]~(2+) owing to the structural differences