1,1′⁃二羟基⁃5,5′⁃联四唑的镧系金属配合物的合成、表征及热行为

Synthesis,Characterization and Thermal Behavior of Lanthanide Metal Complexes Based on 1H,1′H-5,5′-Bitetrazole-1,1′-diolate

以1,1′-二羟基-5,5′-联四唑(H_(2)BTO)为配体,镧系金属离子作为金属中心,采用溶剂热法制备了5种金属配合物:[La_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O(1)、[Ce_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O_(2)、[Pr_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O(3)、[Sm_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O(4)和[Nd_(2)(BTO)_(3)(DMF)_(4)]·6H_(2)O(5)。通过单晶X射线衍射和元素分析对5种配合物的结构进行了表征。结果表明,5种配合物均属于单斜晶系,P2_(1)/n空间群。利用差示扫描量热法研究了配合物1~4的热稳定性,采用Kissinger法和Ozawa法分别计算了其热分解动力学参数。

Five lanthanide metal complexes,[La_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O(1),[Ce_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O_(2),[Pr_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O_(3),[Sm_(2)(BTO)_(3)(H_(2)O)_(8)]·2H_(2)O(4)and[Nd_(2)(BTO)_(3)(DMF)_(4)]·6H_(2)O(5),were synthesized by solvothermal method with 1H,1′H-5,5′-bitetrazole-1,1′-diolate(H_(2)BTO)as ligand and lanthanide metal ions as metal centers.The structures of five complexes were characterized by single crystal X-ray diffraction and elemental analysis.The results show that all the complexes belong to monoclinic system,P2_(1)/n space group.The thermal stability of complexes1~4was investigated by differential scanning calorimetry.And their kinetic parameters of thermal decomposition were calculated by Kissinger method and Ozawa method,respectively.CCDC:1848729,1;1848732,2;1843371,3;1860383,4;1860390,5.