摘要:
The ruthenium(II) complexes [Ru(cis-L)(totpy)(H2O)](PF6)(2) (1) and [Ru(trans-L)(2)(totpy)(H2O)](PF6)(2) (2) (L=1,2-bis(diphenylphosphino)ethylene; totpy = 4'-(4-tolyl)-2,2':6',2"-terpyridine) were synthesized and characterized by elemental analysis, cyclic and differential pulse voltammetries and UV-vis, IR and P-31 NMR spectra. The redox potentials of 2 are less anodic than those of 1. The redox potentials are a result of the different environments created by the phosphine ligands in the trans-complex, associated with their electron donating effect. Electrocatalytic oxidations of benzyl alcohol, cyclohexanol, 1-pentanol, 1,2-butanediol, 1,4-butanediol and cyclohexene, were performed using complexes I and 2 both in solution and immobilized in carbon paste electrode. (c) 2006 Elsevier B.V. All rights reserved.