Abstract Two 2D lanthanide coordination polymers Ln2(2,6-DMBA)5(terpy)2(NO3)(H2O)2 (Ln = La(1), Pr(2); 2,6-DMBA = 2,6-dimethylbenzoic; terpy = 2,2′:6′,2′′-terpyridine) were successfully prepared through conventional solution method at room temperature. Their structures were identified by IR, XRD, single crystal X-ray diffraction and elementary analysis. These means show that complexes 1-2 are isomorphous. The two identical central metal ions of the binuclear complex have different coordination environments and coordination numbers. Thermogravimetric analyses (TGA) were researched by TG/DSC-FTIR, and showed multi-step decompositions. The heat capacities of complexes 1 and 2 were determined by DSC from 260.15 K to 374.15 K. Furthermore, based on the fitted polynomial and thermodynamic equation, the thermodynamic parameters values of the complexes 1 and 2 were obtained.

中文翻译：

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镧系元素与2,6-二甲基苯甲酸和2,2':6',2''-三联吡啶配合物的晶体结构和热力学性质

摘要 两种二维镧系元素配位聚合物 Ln2(2,6-DMBA)5(terpy)2(NO3)(H2O)2 (Ln = La(1), Pr(2); 2,6-DMBA = 2,6-二甲基苯甲酸;terpy = 2,2':6',2''-terpyridine) 在室温下通过常规溶液法成功制备。通过IR、XRD、单晶X射线衍射和元素分析对其结构进行了鉴定。这些均值表明配合物 1-2 是同晶的。双核络合物的两个相同的中心金属离子具有不同的配位环境和配位数。热重分析 (TGA) 通过 TG/DSC-FTIR 进行研究，并显示出多步分解。配合物 1 和 2 的热容量由 DSC 测定，从 260.15 K 到 374.15 K。此外，基于拟合的多项式和热力学方程，