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化学学报
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化学学报 ›› 1994, Vol. 52 ›› Issue (7): 693-698. 上一篇    下一篇

研究论文

氯化稀土与丙氨酸配合行为的研究

高胜利;薛鸿福;张万龙;刘晓均;任德厚   

  1. 西北大学化学系
  • 发布日期:1994-07-15

Studies on coordination behavior between rare earth chloride and alanine

GAO SHENGLI;XUE HONGFU;ZHANG WANLONG;LIU XIAOJUN;REN DEHOU   

  • Published:1994-07-15

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509

被引次数

59 | 15

用半微量相平衡方法研究了SmCl~3-Ala-H~2O三元体系在25℃时的溶解度。结果表明体系中形成了两种配合物: Sm(Ala)~2Cl~3.3H~2O和Sm(Ala)~3Cl~3.3H~2O,合成了RE(Ala)~3Cl~3.3H~2O(RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy),RE(Ala)~2Cl~3.nH~2O(RE=La, Ce, Pr, Nd, Sm, n=3; RE=Ho, Yb,Y, n=4)与RE(AlA)Cl~3.6H~2O(RE=Eu, Gd,Tb, Dy, Ho, Yb, Y)二十四种固体配合物, 用化学分析、IR、UV、X射线分析及TG-DTG对配合物进行了表征, 发现了RECl~3与Ala形成配合物的规律性。

关键词: 紫外分光光度法, 相平衡, 反应机理, 红外分光光度法, Ｘ射线衍射分析, 三元体系, 热稳定性, 丙氨酸, ＥＤＴＡ滴定, 络合反应

The solubility of the ternary system, SmCl3-Ala-H2O, at 25?was studied using a semimicro phase equilibrium method. There are two complexes [namely: Sm(Ala)2Cl3?H2O and Sm(Ala)3Cl3?H2O] formed in this system at 25? Twenty four solid complexes were synthesized for rare earth chloride with alanine, namely, RE(Ala)3Cl3?H2O (RE = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy), RE(Ala)2Cl3譶H2O (RE = La, Ce, Pr, Nd, Sm, n = 3; RE = Ho, Yb, Y, n = 4) and RE(Ala)Cl3?H2O(RE = Eu, Gd, Tb, Dy, Ho, Yb, Y). These complexes were characterized by chem. anal., IR, UV, x-ray diffraction and TG-DTG. The regularity for complex formation of rare earth chloride with alanine was found.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, PHASE EQUILIBRIUM, REACTION MECHANISM, INFRARED SPECTROPHOTOMETRY, X-RAY DIFFRACTION ANALYSIS, TERNARY SYSTEM, THERMAL STABILITY, ALANINE, EDTA TITRATION, COMPLEX REACTION

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