由咪唑-4,5-二羧酸和1,4-对苯二甲酸构筑的一个三维镉髤配位聚合物的合成、结构及荧光性质  

Synthesis, Structure and Property of a 3D Cd(Ⅱ) Coordination Polymer Based on Mixed-Ligands of Imidazole-4,5-Dicarboxylate and 1,4-Benzenedicarboxylate

作　　者：卢文贯[1] 刘宏文[1] 范智轩[1] 赖秀霞[1] 杨小云[1] 谭国灿 

机构地区：[1]韶关学院化学系,韶关512005

出　　处：《无机化学学报》2014年第3期591-596,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21071099);2012年广东省大学生创新训练计划(No.gdcxcy2012-28)资助项目

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。Reaction of CdCl2 with mixed-ligands of imidazole-4,5-dicarboxylic acid （H3IDC） and 1,4-benzenedicar-boxylic acid （H2BDC） under hydrothermal condition, yielded a new 3D cadmium（Ⅱ） 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（Ⅱ） ions by carboxylate oxygen atoms from BDC2- ligands result in an infinite 1D polymeric chain of {[Cd2（CO2）]2（CO2）2}n along 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.

关 键 词：配位聚合物 混合配体 晶体结构 荧光性质 

分 类 号：O614.242[理学—无机化学]