摘要
本文用半微量相平衡方法研究了Dy(NO_3)_3·3H_2O-18C6-CH_3OH三元体系在25℃时的溶解度,结果发现在该体系中只有一种化学计量的配合物生成。系统比较了三水合硝酸镝与冠醚18C6在不同溶剂中的配合行为。考察了配合物组成与其存在条件的关系。通过IR,DTG,TG和DSC研究了配合物的组成和性质。用DSC测得配合物脱水和快速热分解过程的焓变,并求得表现活化能。
In this paper, the solubilities of ternary system Dy (NO_3) 3H_2O-18C6-CH_3OH, at 25℃ have been investigated by the scmimicro method for the study of phase cquilibrium.the results indicated that there is only one stoichiometry coordination compound Dy (NO_3)_3·18C6·3H_2O·CH_3OH formed in this system. The coordination behaviors of Dy (NO_3)_3·3H_2O wilh crown 18C6 in different solvents have been systematically compared each other. The paper has examined the relation of the compositions of the coordineiion compound with aftcrtrcatment conditions. The compositions and properties of the coordination compound have been investigated by IR, DTG, TG, and DSC. The enthalpy changes for the processes of the dehydration and the therml decomposition have been determined by DSC, and the values of the apparent activation energies havve been also determined by DSC.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
1991年第1期43-48,共6页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金
关键词
三水合硝酸镝
冠醚
稀土络合物
Rare earth complex
Trihydrated dysprosium nitrate
Crown ether 18C6
Phase equilibrium
Solubility
Ternary system
