摘要
合成了五种过渡金属(铁-锌)亮氨酸(Leucine)的固态配合物。用差热(DTA)、热重(TG)分析法研究了它们的热分解机理,并对五种配合物分解反应动力学参数进行了简单计算。结果表明:金属配合物的失重活化能大小顺序为:ECo(Leu)2Cl2<E Ni(Leu)2Cl2·2H2O<E Zn(Leu)4Cl2<EFe2(Leu)6(SO4)3·H2O<ECu(Leu)2Cl2,说明配合物的热稳定性与中心金属离子的电荷、半径和电子构型,以及配位数等因素有关。
The complexes of L-leucine acid with Fe(Ⅲ) Co(Ⅱ) Ni(Ⅱ) Cu(Ⅱ) Zn(Ⅱ) were synthesized. The thermal stability and the possible reaction mechanisms of the five complexes were investigated by TG-DTA technique. The thermal decomposition Kinetics parameters of five complexes were evaluated. The Decomposition activation energy order of the five complexes is found to be: ECo(Leu)2Cl2·1/2H2O<E Ni(Leu)2Cl2·2H2O< E Zn(Leu)4Cl2 <EFe2(Leu)6(SO4)3 <ECu(Leu)2Cl2. The result showed that the thermal stability of complexes has something to do with the nature of the center ion,the radius,the electronic structure and so on.
出处
《武汉科技学院学报》
2004年第5期47-50,共4页
Journal of Wuhan Institute of Science and Technology
基金
湖北省教育厅重点项目(项目编号:2004D005)
湖北师范学院重点项目(项目编号:2003A18)
关键词
过渡金属配合物
亮氨酸
热分解动力学
<Keyword>transition metal complexes
leonine acid
thermal decomposition kinetics
