基于2,5-噻吩二甲酸的钙(Ⅱ)和钡(Ⅱ)配位聚合物的合成、晶体结构及性质(英文)

Syntheses,Crystal Structures and Characterization of Ca(Ⅱ) and Ba(Ⅱ)Coordination Polymers Derived from Thiophene-2,5-dicarboxylate

在溶剂热条件下,合成了2个碱土金属配位聚合物[Ca(tdc)(DMF)_2]_n(1)和[Ba(tdc)]n(2)(H_2tdc=2,5-噻吩二甲酸),分别用元素分析、红外光谱、X射线单晶衍射、粉末衍射、热重分析和荧光光谱对它们进行了表征。结构分析表明,配合物1具有4,4连接的二维层状结构,拓扑符号为(44·62),而配合物2呈现三维网络结构。固体荧光测试表明配合物1比配合物2具有更显著的荧光性能。

Two new alkaline earth metal coordination polymers [Ca（tdc）（DMF）2]n （1） and [Ba（tdc）], （2） （H2tdc=2,5- thiophene diearboxylate） have been synthesized under solvothermal condition. They were characterized by elemental analysis, IR spectroscopy, single crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, and fluorescent analysis. Complex 1 exhibits a two-dimensional （2D） layer structure with a uninodal （4,4）-connected （44 .6z） topological type; whereas, complex 2 features a 3D framework consisting of elongated hexagonal channels. Solid-state photolumineseent properties indicate that complex 1 shows noticeable fluorescent emissions upon excitation in comparison to that of complex 2.