摘要
基于2,5-双(四唑)对苯二甲酸配体采用水热法合成了两种新型配位聚合物:[Mg(dtztp)_(0.5)(DMF)(H_(2)O)_(2)]·H_(2)O(1)和[Ba(dtztp)_(0.5)(H_(2)O)_(2)](2)。采用单晶X射线衍射、元素分析、红外光谱和X射线粉末衍射对其结构进行表征。这两个配合物均属于三斜晶系、P-1空间群。采用差示扫描量热法(DSC)和热重分析法(TG)研究其热稳定性,1和2的分解温度分别为344℃和419℃,主体框架开始坍塌的温度分别为260℃和380℃。采用Kissinger和Ozawa方法计算了配合物热分解的动力学参数,得到了配合物1和2的机理方程。此外,利用上述结果对两种材料的热安全性进行了研究,得到了它们的自热分解温度、热着火和热爆炸临界温度。
Two novel coordination polymers(CPs)based on 2,5-bis-(2H-tetrazol-5-yl)terephthalic acid(H_(4)dtztp)ligands,namely[Mg(dtztp)0.5(DMF)(H_(2)O)_(2)]·H_(2)O(1)and[Ba(dtztp)_(0.5)(H_(2)O)_(2)](2)were synthesized by hydrothermal method.The structure was characterized by single crystal X-ray diffraction,elemental analysis,infrared spectroscopy and X-ray powder diffraction.Two complexes belong to the triclinic system,P-1 space group.Differential scanning calorimetry(DSC)and thermogravimetric analysis(TG)were used to study their thermal stability.The decomposition temperatures of 1 and 2 were 344℃ and 419℃,the temperatures at which the main frame begin to collapse were 260℃ and 380℃.The kinetic parameters of thermal decomposition of the complexes were calculated by Kissinger and Ozawa methods,and the mechanism equations of complexes 1 and 2 were obtained.In addition,the thermal safety of the two materials was studied using the above results,and their self-heating decomposition temperature,thermal ignition and thermal explosion critical temperature were obtained.
作者
付思源
王潇
吕磊
祝若倩
FU Siyuan;WANG Xiao;LYU Lei;ZHU Ruoqian(Tongchuan Mining Co.,Ltd,Tongchuan 727000,Shaanxi,China;College of Chemistry and Chemical Engineering,Yan an University,Yan an 716000,Shaanxi,China)
出处
《化学研究》
CAS
2023年第4期303-312,共10页
Chemical Research
基金
National Natural Science Foundation of China(21010093)。
关键词
配位聚合物
热分解
热安全
动力学
四唑
CPs
thermal decomposition
thermal safety
dynamics
tetrazole
