含苯并咪唑基配体Zn(Ⅱ)、Cd(Ⅱ)配位聚合物的合成、结构以及荧光性质研究(英文)

Synthesis, Crystal Structure and Fluorescence Property of Zn(Ⅱ), Cd(Ⅱ) Coordination Polymers with Benzoimidazol-Containing Ligand

以3,5-二(苯并咪唑基)吡啶(L)、间苯二甲酸(m-H2BDC)、4-羧基肉桂酸(H2CCA)、ZnSO4·7H2O和Cd(NO3)2·4H2O为原料,使用溶剂热方法合成了两个配位聚合物[Zn(L)(m-BDC)](1)和[Cd(L)(CCA)]·2H2O(2),利用红外、元素分析、热重分析和X-射线粉末衍射对其进行了表征,利用X-射线单晶衍射对结构进行了测定,并研究了配合物的荧光性质。在配合物1中,L与金属离子连接形成了一维(1D)链结构,而间苯二甲酸根离子与金属离子构成了一个M2(m-BDC)2(M=金属离子)的单元。一维链之间通过M2(m-BDC)2单元连接形成二维网状(2D)结构。在配合物2中,和配合物1类似,L与金属离子连接形成一维链,但与1不同的是羧酸配体与金属离子配位也构成了一维链结构,两种一维链通过配位作用连接构成二维结构。

Two new coordination polymers [Zn（L）（m-BDC）] （1） and [Cd（L）（CCA）] ·2H2O （2） were synthesized by solvothermal method using 3,5-di（1H-benzoimidazol-l-yl）pyridine （L）, isophthalic acid （m-H2BDC）, 4-（2-carbox- yvinyl）benzoic acid （H2CCA）. And the complexes were characterized by FT-IR, elemental analysis, thermogravimetric analysis （TGA） and power X-ray diffraction （PXRD）, meanwhile the crystal structures and fluorescence properties of the complexes have been studied. In complex 1, the ligand L connects the metal atoms to give a 1D chain structure, and the m-BDC〉 coordinates with metal atom to form a M2（m-BDC）2 unit （M=metal）. Moreover, the adjacent 1D chains are linked by the M2（m-BDC）2 to produce a 2D network structure. In complex 2, the ligand joins the metaI atoms to generate a 1D chain like that in 1. However, the carboxylate ligand coordinates with metal atoms to form a 1D chain, and two kinds of the 1D chains crosslink each other to produce a 2D structure. CCDC： 958416, 1; CCDC： 958417, 2.