Abstract Two transition metal coordination polymers (CPs) named Cd(tda)·(phen) (1) and [Zn(tda)·(phen)]·H2O (2) were synthesized through the solvothermal method with thiophene-2,5-dicarboxylic acid (H2tda) and 1,10-phenanthroline (1,10-phen) as ligands and characterized by FT-IR, DSC, XRD, etc. The crystal XRD results indicate that both CPs belong to monoclinic systems with P21/c and P21/n space groups, respectively. The structures of two 1D CPs have hydrogen bonded three-dimensional frameworks. The thermal decomposition characteristics were investigated by thermogravimetric analyses. Moreover, the molar heat capacities of two CPs were measured by temperature modulated differential scanning calorimetry (TMDSC) in the temperature range from 198 to 368 K. The calculated heat capacities of Cd-CP and Zn-CP at 298.15 K are 354.20 and 427.48 J mol−1 K-1, respectively. The thermodynamic parameters such as entropy and enthalpy relative to reference temperature 298.15 K were derived based on the molar heat capacity data.

中文翻译：

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两种过渡金属配位聚合物的合成、晶体结构和热力学性质

摘要 以噻吩-2,5-为溶剂热法合成了Cd(tda)·(phen)(1)和[Zn(tda)·(phen)]·H2O(2)两种过渡金属配位聚合物(CPs)。二羧酸（H2tda）和1,10-菲咯啉（1,10-phen）作为配体，通过FT-IR、DSC、XRD等表征。晶体XRD结果表明这两种CPs都属于单斜晶系，P21/c和分别为 P21/n 空间群。两个一维 CP 的结构具有氢键的三维骨架。通过热重分析研究热分解特性。此外，通过温度调制差示扫描量热法 (TMDSC) 在 198 至 368 K 的温度范围内测量了两种 CP 的摩尔热容。 Cd-CP 和 Zn-CP 在 298.15 K 下的计算热容分别为 354.20 和 427.48 J mol−1 K-1, 分别。相对于参考温度 298.15 K 的熵和焓等热力学参数是根据摩尔热容数据推导出来的。