七水氯化铈与甘氨酸丙氨酸三元固态配合物的热化学  

Thermochemistry of the Ternary Solid Complex of Cerium Chloride Seven-hydrate with Alanine and Glycin

作　　者：李强国[1] 叶丽娟[1] 邓斌[1] 刘义[2] 屈松生[2] 

机构地区：[1]郴州师范高等专科学校化学系,郴州423000 [2]武汉大学化学与环境科学学院,湖北武汉430072

出　　处：《中国稀土学报》2002年第z3期47-50,共4页Journal of the Chinese Society of Rare Earths

基　　金：湖南省教育厅资助项目(00C001)

摘　　要：合成了Ce3+与甘氨酸丙氨酸混配体配合物,通过红外光谱分析、元素分析、热重分析和化学分析,确定了配合物的组成为:Ce(Gly)2(Ala)3Cl3·2H2O,并用溶解量热法分别测定了CeCl3·7H2O(s),2Gly(s)+3Ala(s)和Ce(Gly)2(Ala)3Cl3·2H2O(s)在2mol·L-1HCl中的溶解焓;再根据盖斯定律设计了一个热化学循环,计算得到了七水氯化铈与甘氨酸丙氨酸反应的反应焓ΔrHmθ(298.15K)=29.075kJ·mol-1,并求出了Ce(Gly)2(Ala)3Cl3·2H2O(s)标准生成焓△fHmθ[Ce(Gly)2(Ala)3Cl3·2H2O,s,298.15K]=-4468.0kJ·mol-1。The complex of Ce3+ with Glycin and Alanine, Ce(Gly)2(Ala)3Cl3·2H2O, was synthesized and characterized by IR, element analysis, thermogravimatric analysis and chemical analysis, and the dissolution enthalpies of CeCl3·7H2O(s), 2Gly(s)+3Ala(s)and Ce(Gly)2(Ala)3Cl3·2H2O(s) have been determined in 2 mol·L-1 HCl by the classical solution calorimetry. According to Hess Law, we designed a thermochemical cycle. By calculation, we obtained the reaction enthalpy of Cerium Chloride seven-hydrate with Glycin and Alanine, ΔrHmθ (298.15 K)=29.075 kJ·mol-1, and the standard formation enthalpy of Ce(Gly)2(Ala)3Cl3·2H2O(s) has been determined to be ΔfHmθ =-4468.0 kJ·mol-1.

关 键 词：七水氯化铈 甘氨酸 丙氨酸 热化学研究 

分 类 号：O641.4[理学—物理化学]