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)_s·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”.
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 TG curves, 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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第12期1167-117,共1页
Chemical Journal of Chinese Universities
基金
中国科学院科学基金
关键词
稀土配合物
异硫氰酸盐
二甲亚砜
Rare earth, Isothiocyanate, Dimethyl sulfoxide, Thermal analysis
