1,2,3-三唑二羧酸镉(Ⅱ)配位聚合物的合成、晶体结构与性质

Synthesis,Crystal Structures and Properties of Two Cadmium(Ⅱ) Coordination Polymers Based on 1,2,3-triazoledicarboxylic Acid

利用低温水热法合成了两个新的镉配位聚合物:[Cd(L^1)(H2O)2]n(1)和[Cd(L^2)(H2O)]n(2)(H2L^1=1-羧甲基-4-(2-羧甲氧基苯基)-2H-1,2,3-三唑,H2L^2=2-羧甲基-4-(2-羧甲氧基苯基)-2H-1,2,3-三唑,利用X-射线单晶衍射、红外光谱、核磁共振(1H NMR)、元素分析、X-射线粉末衍射和热重分析对配体和配位聚合物进行了表征。晶体结构分析表明配位聚合物1和2为二维结构;两种完全去质子化的配体以μ4为配位模式分别与镉离子形成二维配位聚合物,配位聚合物1呈现双节点(4,4)连接的{4^4·6^2}拓扑结构,配位聚合物2则呈现{4^3·6^3}拓扑结构。同时,在室温下研究了配体和配位聚合物的固体荧光性质。

Two new cadmium coordination polymers [Cd(L^1)(H2O)2] n (1) and [Cd(L^2)(H2O)] n(2)(H2L^1=1-carboxymethyl-4-(2-carboxymethoxyphenyl)-2H-1,2,3-triazole,H2L^2=2-carboxymethyl-4-(2-carboxymethoxyphenyl)-2H-1,2,3-triazol were synthesized by hydrothermal method. The synthesized coordination polymers have been structurally characterized by X-ray single crystal diffraction,infrared spectroscopy,1H NMR,elemental analysis,X-ray powder diffraction and thermogravimetric analysis. Structural analysis shows that the coordination polymers 1 and 2 have two-dimensional structure. Two completely deprotonated (L^1)^2-and (L^2)^2-ligands form two-dimensional coordination polymers with cadmium ions in the coordination mode of μ4,and coordination polymer 1 can be simplified as a binodal (4,4)-connected layer with the topological symbol of {4^4·6^2},and coordination polymer 2 presents {4^3·6^3} topological structure. The fluorescence properties of ligands,coordination polymers 1 and 2 in solid state have also been investigated at room temperature.