一维之字链配位聚合物[Cd(p-cpoa)(H_2O)_3]_n的合成和表征(英文)  

Synthesis and Characterization of Coordinated Polymer [Cd(p-cpoa)(H_2O)_3]_n with a One-dimensional Zigzag Chain

作　　者：杨燕[1] 秦荣欢[1] 陈光全[1] 

机构地区：[1]玉林师范学院化学与生物系,教授广西玉林537000

出　　处：《玉林师范学院学报》2009年第3期23-27,共5页Journal of Yulin Normal University

摘　　要：水热条件下,合成了一维之字链配位聚合物[Cd(p-cpoa)(H2O)3]n(1)(p-cpoa=4-羧基苯氧乙酸阴离子)并通过元素分析,IR,TG,PL和单晶X射线衍射对其结构进行了表征。该配合物属单斜晶系,P21/c空间群,晶胞参数分别为:a=7.086(1),b=16.288(1),c=10.146(1),β=100.22(1)o,V=1152.4(1)3,Z=4,Dc=2.078g/cm3,μ=1.927mm-1andF(000)=712,R=0.0145,wR=0.0385.镉离子是七配位,与两个4-CPOA的羧基氧原子和3个端基水配位形成变形的五角双锥,并被4-CPOA以双双齿螯合的形式桥连形成沿B方向的Z字形链,链内镉离子间距为10.25(1)。单链通过4-羧基苯氧乙酸和水分子之间的O-H-O氢键作用(2.828(2),2.638(2),2.825(2),2.663(2)and2.728(2))形成平行于AB平面的二维层,再通过相邻层间的配位水和羧酸基强的O-H-O氢键作用堆垛成有趣的三维超分子结构。热分析结果表明在366℃前配合物是稳定的;固体荧光测定结果表明配合物于420nm处发射蓝色荧光,其荧光寿命为0.811ns。The coordination polymer of [Cd（p-cpoa）（H2O）3]n （1） （p-cpoa is p-carboxylato-phenoxyacetate dianion） has been synthesized by hydrothermal method and characterized by elemental analysis, IR., TG, PL and X-ray single crystal diffraction. The title complex crystallizes in the Monoclinic system, space group of P21/c with a = 7.086（1）, b = 16.288（1）, c = 10.146（1） A, β= 100.22（1）°, V= 1152.4（1） A3, Z = 4, Dc = 2.078 g/cm3, μ = 1.927 mm^-1 and F（000） = 712, R= 0.0145 and wR = 0.0385. The Cd（Ⅱ） atom is sevencoordinated and assumes a distorted pentagonal bipyramid geometry, involving four carboxyl O atoms from two different p-cpoa ligands and three terminal water molecules. The Cd（Ⅱ） atom are alternately interlinked by p-cpoa ligands in a bisbidentate mode into a zigzag chain running along the b-direction with the adjacent Cd…Cd distance of 10.25（1） A. There exists a 2D supramolecular network parallel to the ab plane, linked by hydrogen-bonding interactions involving p-cpoa ligands and water molecules （2.828（2）, 2.638（2）, 2.825（2）, 2.663（2） and 2.728（2） A）. A 3D supramolecular network is further constructed by these non-covalent interactions between the zigzag chains. The TG/DTG shows that its chain skeleton is thermally stable up to 366℃ and the blue fluorescent emissions of the complex were determined at 420 nm in a solid state with its short decay lifetime of 0.811 ns.

关 键 词：镉配合物 合成 晶体结构 

分 类 号：O6[理学—化学]