摘要
用改进的半微量相平衡方法研究了Y(NO_3)_3·3H_2O-18C6-CH_3OH三元体系在25℃时的溶解度,测定了饱和溶液的折光率。结果指出,在该体系中只生成一种化学计量的配合物,Y(NO_3)_3·18C6·3H_2O·1.5CH_3OH。考查了相平衡过程中水的行为。系统地比较了三水硝酸化与冠醚18C6在不同溶剂中的配合行为。考查了配合物组成与后处理条件的关系。分离中得了组成为Y(NO_3)_3·18C6·3H_2O的固态配合物,通过化学分析、红外光谱分析、DTG、TG及DSC研究了配合物的组成和性质。测得配合物的脱水和快速热分解过程的焓变值,求得了它们的表观活化能。在常量情况下,考查了配合物的热失重情况。
The solubilities of the ternary system, Y(NO_3)_3·3H_2O-18C6-CH_3OH,
at 25℃ have been investigated by the modified semimicro method to study
the phase equilibrium; the refractive indexes for saturated solutions have
been determined. The results indicate that there is only one stoichiometry
complex formed in this system. The behavior of water for this system
in equilibrium has been examined. The coordination behaviors of
Y(NO_3)_3·3H_2O with crown ether (18C6) in different solvents were
systematically compared each other. The Sample of complex has been
isolated, washed and dried in a desiccator over concentrate sulphuric acid.
The composition of the dried sample has been determined as Y (NO_3)_3·
18C6·3H_2O by chemical analysis. The compositions of samples have
been also examined for different aftertreatment conditions. The proper-
ties of this complex has been examined by IR-spectra, DTG, TG and
DSC. The enthalpies and apparent activtion energies of desolvent and
thermal decomposition have been determined by DSC. L'
出处
《西北大学学报（自然科学版）》
CAS
CSCD
1989年第3期11-17,共7页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金资助课题
关键词
配合物
三水硝酸钇
冠醚18C6
Coordination compound
Trihydrated Yttrium Nitrate
Crown ether 18C6
Phase equilibrium.
