名称:
Syntheses, characterization and third-order nonlinear optical properties of ruthenium(II) complexes containing 2-phenylimidazo-[4,5-f][1,10]phenanthroline and extended diimine ligands
摘要:
Four novel ruthenium(II) complexes [RU(PIP)(2)L](2+) [PIP= 2-phenylimidazo-[4,5-f][1, 10]phenanthroline, L = 1, 10-phenanthroline (phen), 1,4,8,9-tetra-aza-triphenylene (tatp), dipyrido[3,2-a:2',3'-C]phenazine (dppz) and benzo[i]dipyrido[3,2-a:2',3'c]phenazine (dppn)] have been synthesized and characterized. The electrochemical behaviors of these complexes have been studied in acetonitrile by cyclic voltammetry. The nonlinear optical properties of the ruthenium(II) complexes were investigated by Z-scan techniques with 12 ns laser pulses at 540 nm, and all of them exhibit both NLO absorption and self-defocusing effect. The corresponding effective NLO susceptibility \chi (3)\ of the complexes is in the range of 4.78-8.49 x 10(-12) esu. The results indicate that the extension of the pi -framework of the ligands has an effect on the NLO properties of the complexes. (C) 2001 Elsevier Science Ltd. All rights reserved.