一维链状配合物[Pr（2,6-pidic）2（H2O）2]n的合成、晶体结构及热力学性质

Preparation,crystal structure and thermdynamics properties of the 1-D chain complex[Pr（2,6-pidic）2（H2O）2]n

以2,6-吡啶二甲酸(2,6-pidic)和高氯酸镨为原料,通过水热合成法,合成了镨-2,6-吡啶二甲酸的一维链状配合物[Pr(2,6-pidic)2(H2O)2]n。单晶结构测定结果表明,该配合物属单斜晶系,P21/C空间群,晶胞参数为a=1.4135(3)nm,b=1.1328(2)nm,c=1.3080(3)nm,β=101.88(3)°,V=2.0496(8)nm3,单位晶胞所含分子个数(Z)为4。配合物分子通过酯键形成了一维链状结构。通过DSC和TG对配合物的热力学性质进行了研究,结果表明该配合物在较高的温度下具有一定的稳定性。

An 1-D chain complex [Pr(2,6-pidic) 2(H 2O) 2] n was synthesized using the hydrothermal method from 2,6-pyridine dicarboxylic acid (2,6-pidic) and praseodymium(Ⅲ) perchlorate solution.The single crystal X-ray diffraction result shows that the complex crystallizes in the monoclinic system of space group P2 1/C .The crystallographic data shows that a =1.413 5(3) nm, b =1.132 8(2) nm, c = 1.308 0 (3) nm,β=101.88(3)°, V =2.049 6(8) nm 3,number of molecules per unit cell (Z)=4.The one-dimensional chain structure was formed through the ester bonds between the complex molecules.Thermodynamics properties of the complex were studied by DSC and TG.The results showed that the complex was stable at higher temperature.