物理化学学报 >> 2006, Vol. 22 >> Issue (08): 942-946.doi: 10.3866/PKU.WHXB20060807

研究论文 上一篇    下一篇

稀土氨基酸配合物RE(Val)Cl3•6H2O(RE = Nd，Sm)的热分解动力学

吴新民;刘建华;李巍;戚传松   

  1. 北京石油化工学院材料化工系 北京102617
  • 收稿日期:2006-02-09 修回日期:2006-03-07 发布日期:2006-08-04
  • 通讯作者: 吴新民 E-mail:wuxinmin@bipt.edu.cn

Thermal Decomposition Kinetics of Complexes of Rare Earths (RE = Nd, Sm) with Amino Acid RE(Val)Cl3•6H2O

WU Xin-Min;LIU Jian-Hua;LI Wei;QI Chuan-Song   

  1. Department of Material and Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing 102617, P.R. China
  • Received:2006-02-09 Revised:2006-03-07 Published:2006-08-04
  • Contact: WU Xin-Min E-mail:wuxinmin@bipt.edu.cn

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摘要： 合成了稀土氨基酸配合物晶体——三氯化缬氨酸六水合钕、钐，对合成样品进行了EDTA滴定、元素分析、红外光谱分析、热重、差热分析以及熔点测定，推测了配合物的热分解机理，采用Achar法和Coats-Redfern法研究了配合物热分解的非等温动力学过程，给出了各配合物样品失水阶段第一步反应和氨基酸骨架断裂阶段第一步反应的活化能（E）、指前因子的对数值（ln(A)）及热分解反应动力学方程式.

关键词: 稀土配合物, RE(Val)Cl3·6H2O(RE = Nd，Sm), 热分解机理, 活化能, 动力学方程

Abstract: Some complexes of rare earth and valine were synthesized: monovalino -hexaquo-neodymium, samarium. Their property was determined by the EDTA titration, element analysis, infrared spectrum, thermogravimetry, differential thermal analysis and melting point measure. The thermal decomposition mechanism had been deduced, and non-isothermal kinetics of the thermal decomposition of the complexes also had been studied with the methods of Achar and Coats-Redfern. These parameters were carried out that the activation energy (E ), the values of logarithm of preexponential factore {ln(A/s-1)} and the kinetics equation of the complexes’ first step reaction which belong to the stagy of water-loss and the framework of amino acid breaking down.

Key words: Rare earths complexes, RE(Val)Cl3·6H2O(RE = Nd，Sm), Thermal decomposition mechanism, Activation energy, Kinetics equation