稀土镧氨基酸Schiff碱的合成及热分解动力学研究

合成了配合物La(Glu-sal)(H2O)2Cl].2H2O,并通过化学分析、红外光谱、紫外光谱、摩尔电导和TG-DTA等对其进行了表征,运用Achar法和Coats-Redfern法,研究了配合物第3步、第4步热分解的动力学过程,第3步非等温动力学方程为dα/dt=Ae-E/RT3/2(1-α)2/31-(1-α)1/3]-1,其表观活化能E=216.4 kJ/mol,指前因子lnA=45.2 s-1;而第4步动力学方程为dα/dt=Ae-E/RT(1-α)2,其表观活化能E=289.8 kJ/mol,指前因子lnA=50.9 s-1。

Study on synthesis of the kinetics of thermal decomposition of lanthanum complexes with Schiff base of amino acids

The complex La(Glu-sal)(H2O)2Cl]·2H2O was synthesized.Complexes were characterized by chemistry analysis,IR,UV,molar conductance and TG-DTA.The equation of non-isothermal kinetics at third step and fourth step were studied by the Achar method and the Coats-Redfern method.The kinetic equation at third step may be expressed:dα/dt=Ae-E/RT3/2(1-α)2/31-(1-α)1/3]-1,the kinetic parameters were E=216.4 kJ/mol,lnA=45.2 s-1.The kinetic equation at fourth step may be expressed:dα/dt=Ae-E/RT(1-α)2.The kinetic parameters were E=289.8 kJ/mol,lnA=50.9 s-1.