Synthesis,Crystal Structure and Luminescent Property of a Dinuclear Cadmium Complex Based on 2-(2-(1H-Benzo[d]imidazol-2-yl)-phenyl)-1-phenyl-1H-benzo[d]imidazole

A dinuclear cadmium complex [Cd_2(bppb)Cl_4×2DMF](1), where bppb is 2-(2-(1 Hbenzo[d]imidazol-2-yl)phenyl)-1-phenyl-~1 H-benzo[d]imidazole, was synthesized and characterized by X-ray single-crystal structure analyses. For 1: C_(58) H_(50) Cd_2 Cl_4 N_(10) O_2, M_r = 1285.68, monoclinic system, space group P2_1/n, a = 16.136(3), b = 10.612(2), c = 16.270(3) ?, β = 96.209(2)°, V = 2769.7(9) ?~3, Z = 2, D_c = 1.542 g/cm~3, λ = 0.71073 ?, μ(Mo Kα) = 1.013 mm~(–1), F(000) = 1296, S = 1.055, R = 0.0393 and wR = 0.1185 for 4876 observed reflections with I 2σ(I). One 9 mium ion which is five-coordinated by three chloride ions and two nitrogen atoms from bppb. Two cadmium ions are bridged by two chloride ions. The Cd_2(bppb)_2 Cl_2(μ-Cl_2) decomposes at 350 ℃ which is much lower by 70 ℃ than [Cd_2(bpbb)_2 Cl_2(μ-Cl_2)](420 ℃). The complex emits blue luminescence in both DMF solution and solid powder. Phenyl ring substituting NH hydrogen atom of benzimidazole group in ligand can not obviously change the UV-vis and luminescence spectra peaks location of the benzimidazole cadmium complex.     

LCST类水凝胶开关效应的研究进展

本文综述了LCST水凝胶的研究进展,详细论述了水凝胶的各种体积相变机理,以及亲疏水基团、介质的离子性、pH值等因素对凝胶性能的影响,分析探讨了这类水凝胶的开关效应在药物控释、物质分离、酶的固定以及电磁感应元件等方面的应用。