Synthesis, Crystal Structures and Third-Order Nonlinear Optical Properties of Two Novel Ferrocenyl Schiff-Based Complexes [Ag(L)_2](NO_3)(MeOH)(EtOH) and [HgI_2(L)] {L = 1,2-Bis[(ferrocen-1-ylmethylene)amino]ethane}

摘要

Two novel ferrocenyl complexes [Ag(L)_2](NO_3)·(MeOH)·(EtOH) (1) and [HgI_2(L)] (2) {L = 1,2-bis[(ferrocen-1-ylmethylene)amino]ethane} have been prepared and structurally characterized by means of X-ray single crystal diffraction. The central ion, silver(I) or mercury(II), has a distorted tetrahedral environment, the silver(I) ion coordinates with two L, and the mercury(II) ion binds one L and two iodine atoms. Their third-order nonlinear optical (NLO) properties were determined by Z-scan techniques in DMF solution. The results indicate that the two complexes exhibit very strong NLO absorption and strong self-focusing effects. The thirdorder NLO absorptive coefficients α_2 are 1.34 * 10~(-8) m W~(-1) for 1 and 3.1 * 10~(-9) m W~(-1) for 2. The refractive indexes n_2 for the two complexes are 1.15 * 10~(-18) and 8.02 * 10~(-19) m~2 W~(-1), respectively. The hyperpolarizability γ values are calculated to be 2.68 * 10~(-30) esu for 1 and 1.44 * 10~(-30) esu for 2. The γ values are several orders of magnitude larger than those of the reported aryl and vinyl derivatives of ferrocene.