氯化钆与L-丙氨酸和甘氨酸三元固态配合物的合成及热化学和非等温热分解动力学研究  

Synthesis and Thermochemical and Non-isothermal Thermal Decomposition Kinetic Studies on Gd(Ala)_3(Gly)2Cl_3·2H_2O (s)

作　　者：张忠海[1] 方涛[1] 

机构地区：[1]孝感学院化学系,湖北孝感432000

出　　处：《孝感学院学报》2004年第6期15-18,共4页JOURNAL OF XIAOGAN UNIVERSITY

基　　金：湖北省教育厅重点科学研究资助项目 (2 0 0 1A2 70 0 6)

摘　　要：合成了氯化钆与L-丙氨酸和甘氨酸的三元固态配合物Gd(Ala)3(Gly)2Cl3·2H2O,用溶解量热法测定了配位反应的反应焓。通过设计一个热化学循环,计算出了配合物的标准生成焓,并用TG-DTG技术研究了配合物的热分解过程。采用微分法中的Achar法和积分法中的Coats-Redfern法对配合物第二步热分解反应进行了非等温动力学研究,推测出了可能的热分解反应机理,求出了反应的表观活化能。The ternary solid-state complex Gd(Ala)3(Gly)2Cl3·2H2O (s) has been synthesized with GdCl3·6H2O(s), L-alanine and glycine as reactants. The molar dissolution enthalpies of the reactants and the products in 2mol/L HCl solvent have been measured using an isoperibol calorimeter. From these results and other auxiliary data, the standard molar formation enthalpy of Gd(Ala)3(Gly)2Cl3·2H2O(s) has been determined. The thermal decomposition processes of the complex have been studied by use of TG-DTG technique. The non-isothermal kinetic data have been analyzed by comparison of the Achar method and Coats-Redfern method. The possible reaction mechanism was suggested and the apparent activation energy of the reaction was obtained.

关 键 词：氯化钆L-丙氨酸 甘氨酸 热化学 非等温动力学 

分 类 号：O642.3[理学—物理化学]