Syntheses, characterization and third other non-lincar optical properties of the ruthenium(II) complexes containing 2-phenyl-imidazo[4,5-f][1,10]phenanthroline derivatives

摘要

The ruthenium(II) complexes [Ru(dmb)_2(LH)][ClO_4]_2 [dmb = 4,4'-dimethyl-2,2'-bipyridine; LH=2-(nitrophenyl)-imidao[4,5-f][1,10]phenanthroline (PNOPH), 2-(3-nitrophenyl)imidazo[4,5-f][1,10]pnehanthroline (MNOPH) and 2-(2-nitrophenyl)imidazo[4,5-f][1,10]phenanthroline (ONOPH) and their deportonated complexes have been synthesized and characterized. The electrochemical behaviour of these complexes were examined and compared to that of [Ru(dmb)_3]~(2+). Non-linear optical (NLO) properties of the complexes were investigated using Z-scan techniques. All of the complexes exhibit both NLO absorption and self-defocusing effect (n_2=-0.79×10~(-17) to -1.44×10~(-17) m~2 W~(-1), a_2=3.00×10~(-11) to 7.90×10~(-11) m W~(-1), [M]=5×10~(-5) mol dm~(-3) in acetonitrile solution). The corresponding effective NLO susceptibilities [X~(3)] of the complexes are 2.86×10~(-12) to 5.07×10~(-12) esu. The results indicate that the substitution and deprotonation of the ligand have an effect on the NLO properties of the complexes.Finally, the crystal structure of [Ru(dmb)_2(PNOP)][ClO_4].H_2O.0.5C_6H_6 was determined by X-ray diffraction analysis; it contains two twisted dmb ligands and the bidentate ligand PNOP with torsional angles between each dmb ring pair of 3.4 and 8.7.