高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (12): 1167.

• 研究论文 •    下一篇

稀土异硫氰酸盐与二甲基亚砜配合物的合成、性质及热分析研究

孙同山, 张建华, 蒋本果, 尹敬执   

  1. 山东大学化学院
  • 收稿日期:1988-02-02 出版日期:1989-12-24 发布日期:1989-12-24
  • 通讯作者: 孙同山
  • 基金资助:

    中国科学院科学基金

Studies on Synthesis, Properties and Thermal Analysis of Complexes of Rare Earth Isothiocyanates with Dimethyl Sulfoxide

Sun Tongshan, Zhang Jianhua, Jiang Bengao, Yin Jingzhi   

  1. College of Chemistry, Shandong University, Jinan
  • Received:1988-02-02 Online:1989-12-24 Published:1989-12-24

摘要: 合成了15种稀土异硫氰酸盐与二甲基亚砜(DMSO)的配合物,经化学分析和元素分析确定其组成为RE(NCS)3·mDMSO(RE=La,Ce,Pr,Nd,Sm,Eu,Gd;m=5.RE=Tb,Dy,Ho,Er,Tm,Yb,Lu,Y;m=4).用红外光谱及X射线衍射技术进行了表征.运用TG-DTA-DTG联用技术研究了该系列配合物的热分解过程,求算热重动力学参数发现,第一步热分解阶段的活化能随着中心高子——镧系元素原子序数的依次递增呈现“双峰现象”.

关键词: 稀土, 异硫氰酸盐, 二甲基亚砜, 热分析

Abstract: Fifteen new solid complexes of rare earth isothiocyanates with dimethyl sulfoxide (DMSO) were synthesized and characterized by chemical analysis, IR and X-ray diffraction.Compositions of the complexes conform to the formula RE(NCS)3·mDMSO(RE=La, Ce, Pr, Nd, Sm, Eu, Gd, m=5, RE=Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, m=4).Thermal decompositions of the complexes were studied by TG-DTA-DTG.The values of activation energy and reaction order for the first steps of decomposition of the complexes were determined from TGcurves, using the Coats-Redfern method.The results show that the activation energy depends on the atomic number of lanthanoids, and "double peak phenomenon" is observed.

Key words: Rare earth, Isothiocyanate, Dimethyl sulfoxide, Thermal analysis

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