固态配合物[Nd_2(Glu)_2(H_2O)_8](ClO_4)_4·H_2O的非等温热分解动力学研究  

The Non-Isothermal Thermal Decomposition Kinetics of Solid-State Complex [Nd_2(Glu)_2(H_2O)_8](ClO_4)_4·H_2O

作　　者：张忠海[1] 周育学[2] 李会荣[1] 刘义[1] 屈松生[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072 [2]孝感学院化学系,湖北孝感432000

出　　处：《武汉大学学报（理学版）》2005年第4期426-430,共5页Journal of Wuhan University:Natural Science Edition

基　　金：教育部高校优秀青年教师教学科研奖励计划资助项目(2001);湖北省教育厅重点资助项目(2001A27006)

摘　　要：用TG-DTG-DTA(热重-微分热重-差热)联用技术研究了固体配合物[Nd2(Glu)2(H2O)8](ClO4)4.H2O在动态氮气气氛中的热分解过程.采用微分法中的Achar法和积分法中的Coats-Redfern法对热分解第三阶段的数据进行非等温动力学分析处理,推测出热分解机理为二级化学反应,求出了热分解反应的表观活化能和指前因子.用Doyle-Zsako法和Satava-Sestak法对所得结果进行了验证,进一步证明所得动力学参数和机理函数的正确性.4种方法求得的表观活化能和指前因子的平均值分别为198.75kJ/mol和1.69×1017s-1.The thermal decomposition of complex [Nd2（Glu）2（H2O）8]（ClO4）4·H2O under the flow nitrogen atmosphere was studied by TG-DTG-DTA technique. The non-isothermal kinetic data of the third-stage decomposition process were analyzed by means of Achar method and Coats-Redfern method. The results showed that the most probable kinetic model function was a second order chemical reaction. Moreover, to verify the reliability of the results obtained above, the basic data of the non-isothermal decomposition were analyzed by means of Doyle-Zsako method and Satava-Sestak method. The average values of apparent activation energy （Ea） and preexponential factor （A） obtained by the four methods are 198.75 kJ/mol and 1.69×10^17s^-1.

关 键 词：稀土氨基酸配合物 热分解 非等温动力学 热分析 

分 类 号：O642.3[理学—物理化学]