二维配位聚合物Co(PDC)·2H_2O的水热合成与热性能研究(PDC=3,5-二羧酸吡啶)(英文)

Hydrothermal Synthesis and Thermal Property of a Two-dimensional Coordination Polymer Co(PDC)·2H_2O (PDC=3,5-pyridinedicarboxylate)

在413K下,3,5-二羧酸吡啶和CoCl2·6H2O的混合物在水热条件下反应得到标题化合物Co(PDC)·2H2O(PDC=3,5-二羧酸吡啶)。单晶X射线衍射表明该配位聚合物属于单斜晶系,空间群为C2/c,晶胞参数为a=0.9902(2)nm,b=1.1981(2)nm,c=0.73997(15)nm,β=105.18(3)°,Z=4。具有2-D层状结构的Co(PDC)·2H2O中包含钴阳离子和3,5-二羧酸吡啶,其中每个钴阳离子被1个吡啶环上的氮原子、2个羧基上的氧原子以及2个水分子上的氧原子配位。热分析结果表明该化合物在330℃以下保持热稳定。

The title compound, Co（PDC） · 2H2O （PDC = 3,5-pyridinedicarboxylate）, was hydrothermally synthesized by the reaction of 3,5-pyridinedicarboxylate acid and CoCl2 ·6H2O at 413 K. This coordination compound crystallized in monoclinic, space group C2/c with a =0.990 2（2） nm, b = 1. 198 1 （2） nm, c =0.739 97 （15） nm,β = 105.18（3）° and Z =4. As characterized by single crystal X-ray diffraction, the 2-D layer of the title compound was composed of cobalt cations and 3,5-pyridinediearboxylate ligands, wherein each cobalt ion was five-coordinated by one nitrogen atom from a pyridine ring, two oxygen atoms from two identical bidentate carboxylate groups attached on the pyridine tings, and two oxygen atoms from two water ligands. The result given by thermogravimetric analysis revealed that the title compound was thermally stable up to 330℃.