Highly stable chiral cadmium 1,2,4-benzenetricarboxylate: synthesis, structure, and NLO and fluorescence properties.
Highly stable chiral cadmium 1,2,4-benzenetricarboxylate: synthesis, structure, and NLO and fluorescence properties.
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DOI：
10.1021/ic051566x
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发表时间：
2006-02
影响因子：
4.6
通讯作者：
Lei Wang;Ming Yang;Guanghua Li;Zhan Shi;S. Feng
中科院分区：
文献类型：
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作者：
Lei Wang;Ming Yang;Guanghua Li;Zhan Shi;S. Feng
采用不对称1,2,4-苯三甲酸作为桥联配体，在水热条件下制备了一种新型3-D手性镉配位聚合物[Cd(2)(OH)(1,2,4-BTC)]（1,2,4-BTC = 1,2,4-苯三甲酸），并通过单晶X射线衍射对其进行了表征。该化合物在斜方空间群 P2(1)2(1)2(1) 中结晶，晶胞参数 a = 6.900(2) A、b = 7.404(3) A、c = 19.116(5) A、V = 976.5(5) A(3) 和 Z = 4。其结构包含二维 Cd-O-Cd 连接性，进一步通过1,2,4-比特币 配体进入 3-D 超分子框架。 1,2,4-BTC配体显示出一种新颖且前所未有的配位模式：八个金属与九个键合，每个羧酸盐作为三齿基团。该化合物在室温下表现出强烈的光致发光，并表现出独特的非线性光学特性。根据 TG/DTA 分析结果，该结构在高达约 380 摄氏度的温度下保持热稳定。
Employing an unsymmetrical 1,2,4-benzenetricarboxylate as a bridging ligand, a new 3-D chiral cadmium coordination polymer [Cd(2)(OH)(1,2,4-BTC)] (1,2,4-BTC = 1,2,4-benzenetricarboxylate) has been prepared under hydrothermal conditions and characterized by single crystal X-ray diffraction. This compound crystallizes in the orthorhombic space group P2(1)2(1)2(1), with cell parameters a = 6.900(2) A, b = 7.404(3) A, c = 19.116(5) A, V = 976.5(5) A(3), and Z = 4. Its structure contains 2-D Cd-O-Cd connectivity, which is further linked by the 1,2,4-BTC ligand into a 3-D supramolecular framework. The 1,2,4-BTC ligand shows a novel and unprecedented coordination mode: nine bonds to eight metals with each carboxylate as a tridentate group. The compound exhibits intense photoluminescence at room temperature and shows distinct NLO properties. On the basis of the results of TG/DTA analyses, the structure is thermally stable up to approximately 380 degrees C.