【摘要】 以CdCl2、咪唑-4,5-二羧酸(H3IDC)和1,4-对苯二甲酸(H2BDC)为原料,在水热条件下合成得到了一个新的三维镉髤配位聚合物[Cd2(HIDC)(BDC)(H2O)]n(1),通过元素分析、红外光谱、粉末X-射线衍射、热重分析和单晶X-射线衍射法等对其组成和结构进行了表征。单晶X-射线结构分析表明,在配合物1的晶体结构中含有沿a轴方向的一维无限的{[Cd2(CO2)]2(CO2)2}n配位聚合链。此聚合链再通过桥连HIDC2-与BDC2-配体的连接,最终形成一复杂的三维金属-有机框架结构。配合物1的固体室温荧光测试结果表明,在波长为350 nm的光激发下于456 nm处出现强烈的荧光发射。更多还原

【Abstract】 Reaction of CdCl2with mixed-ligands of imidazole-4,5-dicarboxylic acid(H3IDC) and 1,4-benzenedicarboxylic acid(H2BDC) under hydrothermal condition, yielded a new 3D cadmium 髤 coordination polymer of [Cd2(HIDC)(BDC)(H2O)]n(1), which was structurally characterized by elemental analysis, infrared spectroscopy, powder X-ray diffraction, and single-crystal X-ray diffraction. The result of single-crystal X-ray diffraction analysis reveals that complex 1 crystallizes in the monoclinic crystal system with P21/n space group, a=0.884 34(2) nm, b= 1.577 50(3) nm, c=1.071 58(3) nm, β=97.227(2), V=1.483 03(6) nm3, Z=4, Dc=2.513 g·cm-3, F(000)=1 072, the final R1=0.031 5, wR2=0.053 1 for 2 674 observed reflections with I>2σ(I). In complex 1, the interconnection of Cd髤 ions by carboxylate oxygen atoms from BDC2-ligands result in an infinite 1D polymeric chain of {[Cd2(CO2)]2(CO2)2}nalong a axis. The polymeric chains are further connected by HIDC2-and BDC2-bridging ligands to form a complicated 3D metal-organic framework architecture. Furthermore, its thermal stability and luminescent property at room temperature in the solid state were also investigated. CCDC: 923674.更多还原