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本文利用非等温DSC曲线对十二种镧系元素异硫氰酸盐与苄胺形成的配合物Ln(NCS)_2.4C_6H_5CH_2NH_2(Ln=La、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb)进行了非等温动力学研究,并运用积分法和微分法进行了分析,推断了它们的热分解反应机理函数,当Ln=La、Pr、Nd、Sm、Eu、Gd时,配合物的热分解动力学方程式da/dt=A·e~(-E/RT·3)(1-α)~(2/3);当Ln=Tb、Dy、Ho、Er、Tm、Yb时,则为dα/dt=A·e~(-E/RT·)(1-α),呈现“钆断”现象.此外还得到了该系列配合物的热分解反应动力学补偿效应表达式.
In this paper, Ln (NCS) _2.4C_6H_5CH_2NH_2 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb and Dy) complexes of twelve lanthanide isothiocyanates and benzylamine were synthesized by non-isothermal DSC. , Ho, Er, Tm and Yb) were studied by using integral method and differential method. The mechanism of their thermal decomposition reaction was deduced. When Ln = La, Pr, Nd, Sm, Eu , Gd, the thermal decomposition kinetic equation da / dt = A · e ~ (-E / RT · 3) (1-α) ~ (2/3) , Tm, Yb, then the phenomenon of “gadolinium broken” was found as dα / dt = A · e ~ -E / RT · (1-α) .The thermal decomposition kinetics Compensation effect expression.