三氯化缬氨酸六水合铒配合物的热分解反应动力学

对三氯化缬氨酸六水合铒配合物进行了合成和EDTA滴定、元素分析、红外光谱分析、熔点测定,利用热重、差热分析等方法推测了配合物的热分解机理.配合物的热分解过程分为热分解失水、氨基酸骨架断裂,最终配合物为稀土碱式盐.对配合物第1、第2步热分解反应进行了非等温动力学研究,两步反应的活化能分别为123.42和222.83 kJ·mol-1,指前因子的对数值分别为36.31和41.00,复杂的反应动力学方程同时被确定.

Thermal Decomposition Kinetics of Complex Monovaline-Hexaquo-Erbium

Erbium rare earth complex with valine,Er(Val)Cl3·6H2O,was synthesized.Properties of the complex were determined by EDTA titration,elemental analysis,infrared spectral analysis and melting point measurement.Its hermal decomposition mechanism was deduced through thermogravimetry and differential thermal analysis.The results showed that the thermal decomposition procedure was mad up of a dehydration process,the break up of amino acid reactions as a fitted framework, and the final decomposed product being a rare earth basic salt.The non-thermal kinetic study on the first two step thermal decomposition reactions was performed with the methods of Achar and Coats-Redfern.The activation energies of the two reactions were determined to be 123.42?kJ·mol-1 and 222.83?kJ·mol-1,respectively,and the values of logarithm of preexponential factor were 36.31 and 41.00,respectively.Kinetic equations for the studied reactions were fitted.