摘要:
                                New cyclometalated Pt(II) complexes bearing 1,2-phenylenediamine (pda) derivatives were synthesized and their chemical and electrochemical properties were investigated. Two Pt complexes, [Pt(bzqn) (pda)] (PF6) (bzqn benzo[h] quinoline, [1](PF6): pda 1,2-phenylenediamine, [2](PF6): pda 4,5-dimethyl-1,2- phenylenediamine), were synthesized by the reaction of (Bu4N)[PtCl2(bzqn)] with corresponding pda derivatives. The Pt-pda complexes were converted to Pt-bda (bda = 1,2-benzenediamide) complexes by treatment of 2 mol equiv of 1,8-diazabicyclo[5.4.0] undec-7-ene (DBU), and they showed two-step reversible redox couples in cyclic voltammetry. The cyclometalated ligand gave a strong electronic effect to the bda ligand to take place the negative shift of the bda-based redox potentials. (C) 2010 Elsevier B.V. All rights reserved.