Er_2((PhCH_2COO)_6)·4H_2O的结构及热分析

CRYSTAL STRUCTURE AND THERMAL ANALYSIS OF ERBIUM COMPLEX WITH BENZENE ACETIC ACID

用X-射线四圆衍射仪测定了Er_2(PhCH_2COO)_6·4H_2O的晶体结构。配合物属于单斜晶系,空间群为P2_1/α,晶胞参数:α=0.9008(3)nm,b=1.4243(5)nm,c=1.8437(7)nm,β=98.80(3)°,V=2.337(1)nm^3,Z=4.采用TG-DTG-DTA研究了配合物的热分解过程,确定了热分解机理。采用Freeman-Carroll方法计算了配合物脱水过程的活化能和反应级数。用DSC测定了配合物脱水,熔化过程的焓变。

The crystal structure of erbium (Ⅲ) complex of benzene acetic acid is reported.The complex crystallizes in the monoclinic space group P_2_1/a with a=0. 9008(3)nm,b=1. 4242(5) nm, c=1. 8437(7) nm; β=98.80(3)°, V=2.337(1) nm^3, Z=4. Themechanism of thermal decomposition of complex has been studied by TG-DTG-DTA.The activation energy for dehydration reaction has been calculated by Freeman-Carroll method. The enthalpy change for dehydration and phase change process hasbeen determined.