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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (6): 521-523.    下一篇

研究论文

用非等温DSC曲线确定Ln(NCS)3-·4C3H5CH2NH2的热分解反应机理函数及热分解反应动力学参数

杨淑荣;张建华;蒋本杲;杨兆荷   

  1. 山东大学化学学院;山东大学晶体材料研究所
  • 发布日期:1991-06-15

The determination of the most probable mechanism functions and kinetic parameters of the thermal decomposition reaction of complexes of rare earth isothiocyanates with benzylamine by non-isothermal DSC curves

YANG SHURONG;ZHANG JIANHUA;JIANG BENGAO;YANG ZHAOHE   

  • Published:1991-06-15

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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)3·4C6H5CH2NH2(Ln=La、Pr、Nd、Sm、Eu、Ge、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。

关键词: 反应机理, 微分法, 动力学方程, 钬络合物, 示差扫描量热法, 异硫氰酸盐, 镱络合物, 镨络合物, 铕络合物, 镧络合物

The thermal decomposition of the complexes Ln(NCS)34C6H5CH2NH2 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) was studied under non-isothermal condition by DSC curves. Kinetic parameters were obtained from anal. of the DSC curves by the integral and differential methods. Their kinetic equations may be expressed as: da/dt = Ae-E/RT(3(1-a)2/3) when Ln = La, Pr, Nd, Sm, Eu, Gd and da/dt = Ae-E/RT((1-a) when Ln = Tb, Dy, Ho, Er, Tm, Yb. The math. expression of the kinetic compensation effect of these thermal decomposition reactions was obtained. Possible mechanisms are suggested.

Key words: REACTION MECHANISM, DIFFERENTIATION, KINETICS EQUATIONS, HOLMIUM COMPLEX, DIFFERENTIAL SCANNING CALORIMETRY, ISOTHIOCYANATE, YTTERBIUM COMPLEX, PRASEODYMIUM COMPLEX, EUROPIUM COMPLEX, LANTHANUM COMPLEX

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