Study on Thermochemistry and Thermal Decomposition Kinetics of Ternary Solid-State Complex of Gadolinium Chloride with L-Tyrosine and Glycine

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (4): 386-390. Previous Articles Next Articles

氯化钆与L-酪氨酸和甘氨酸三元固态配合物的热化学及热分解动力学研究

张忠海^1,2, 库宗军², 夏菲¹, 刘义¹, 李会荣¹, 胡艳军¹, 赵顺省¹, 屈松生¹

1. 武汉大学化学与分子科学学院, 武汉, 430072;
2. 孝感学院化学系, 孝感, 432000

投稿日期:2003-04-21 修回日期:2003-10-17 发布日期:2014-01-26
通讯作者: 刘义,E-mail:liuyi@public.wh.hb.cn E-mail:liuyi@public.wh.hb.cn
基金资助:
教育部高校优秀青年教师教学科研奖励计划资助项目(2001).

Study on Thermochemistry and Thermal Decomposition Kinetics of Ternary Solid-State Complex of Gadolinium Chloride with L-Tyrosine and Glycine

ZHANG Zhong-Hai^1,2, KU Zong-Jun², XIA Fei¹, LIU-Yi¹, LI Hui-Rong¹, HU Yan-Jun¹, ZHAO Shun-Sheng¹, QU Song-Sheng¹

1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072;
2. Department of Chemistry, Xiaogan University, Xiaogan 432000

Received:2003-04-21 Revised:2003-10-17 Published:2014-01-26

Abstract

The ternary solid-state complex of gadolinium chloride with L tyrosine and glycine, Gd(Tyr)(Gly)₃Cl ₃·3H₂O, was synthesized and characterized. Using a solution reaction isoperibol calorimeter, the molar enthalpy of reaction for the following reaction: GdCl₃·6H₂O (s)+Tyr (s)+3Gly (s)=Gd(Tyr)(Gly)₃Cl₃·3H₂O (s)+3H₂O (l), was determined to be (9.451±0.468) kJ·mol^-1 at 298.15 K. From the above molar enthalpy of reaction and other auxiliary thermodynamic quantities, the standard molar enthalpy of formation of the titled complex at 298.15 K was derived as -(4269.7±2.3) kJ·mol^-1. The kinetics of thermal decomposition of the complex was studied by thermal analysis technique under non isothermal condition. The possible reaction mechanism was suggested to be a second order chemical reaction. The kinetic equation may be expressed as: dα/dT=(A/β)exp(-E/RT)(1-α)². The apparent activation energy and pre exponential factor of the reaction were 215.17 kJ·mol^-1 and 10^18.71 s^-1, respectively.

Key words: complex of rare earth, L-tyrosine, glycine, standard enthalpy of formation, thermal decomposition kinetics

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ZHANG Zhong-Hai, KU Zong-Jun, XIA Fei, LIU-Yi, LI Hui-Rong, HU Yan-Jun, ZHAO Shun-Sheng, QU Song-Sheng. Study on Thermochemistry and Thermal Decomposition Kinetics of Ternary Solid-State Complex of Gadolinium Chloride with L-Tyrosine and Glycine[J]. Acta Chimica Sinica, 2004, 62(4): 386-390.

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氯化钆与L-酪氨酸和甘氨酸三元固态配合物的热化学及热分解动力学研究

Study on Thermochemistry and Thermal Decomposition Kinetics of Ternary Solid-State Complex of Gadolinium Chloride with L-Tyrosine and Glycine

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