| 希土硝酸盐冠醚配合物--Ⅸ.La(NO3)3·4H2O-NO2B15C5-CH3CN三元体系在25℃和15℃时溶解度的研究 |
| COMPLEXES OF CROWN ETHER WITH RARE EARTH NITRATE IX. STUDIES ON SOLUBILITIES OF TERNARY SYSTEM La(NO3)3 ?H-2O-NOB15C5-CH3CN AT 25℃ AND 15℃ |
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| 摘要: 改进了半微量相平衡研究方法,研究了La(NO3)3·4H2O-NO2B15C5-CH3CN三元体系在25℃和15℃时的溶解度,测定了25℃各饱和溶液的折光率。结果表明,在该体系中只有一种计量配合物La(NO3)3·NO2B15C5·4H2O生成,该配合物的溶解度随温度的降低而减小,溶解度曲线覆盖的范围很大。利用不同方法获得了固态配合物La(NO3)3·NO2B15C5·4H2O。通过化学分析、紫外光度分析、红外光谱和差热与热重分析等研究了它的组成和性质,考查了它的水合度与后处理条件的关系。制得了二水合物La(NO3)3·NO2B15C5·2H2O及无水物。 |
| 关键词: 半微量相平衡研究方法 相平衡 希土硝酸盐 冠醚 配合物 |
| 基金项目: 中国科学院科学基金 |
| Abstract: The semimicro method to study phase equilibrium reported by us in 1983 has been improved. The solubilities of the La(NO3)3·4H20-NO2Bl5C5-CH3 CN ternary system at 25℃ and 15℃ have been studied by the titled method and the refraction indexes of the saturated solutions at 25℃ have also been determined for this system. The results indicate there is only one complex La(NO3)3·NO2Bl5C5·4H2O formed. It has ruled out the possibility forming any other complex species with different stoichiometry.This complex was obtained with different methods and its composition is characterized by chemical analysis,ultraviolet and infrared spectra, as well as themogravimetric analysis. The relation between the composition of the complex and aftertreatment conditions has been examined too. Other species of the complex La(NO3)3·NO2B15C5·2H2O and La(NO3)3·NO2B15C5 were obtained when it was dried over concentrated H2SO4 and P2O5 respectively. |
| Keywords: semimicro method to study phase equilibrium phase equilibrium rare earth nitrate crown ether complex |
| 投稿时间：1985-06-15 |
| 摘要点击次数: 1819 |
| 全文下载次数: 1660 |
| 蒋海盈,何明安,李成林,任德厚.希土硝酸盐冠醚配合物--Ⅸ.La(NO3)3·4H2O-NO2B15C5-CH3CN三元体系在25℃和15℃时溶解度的研究[J].无机化学学报,1986,2(3):54-62. |
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