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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (6): 853-857. 上一篇    下一篇

研究论文

三元体系LaX3—PIAP—H2O（X^—=ClO4^—,NO3^—,Cl^—）（30℃）的相平衡

郝志峰;梁宏斌;唐宗薰;余林;余坚;方奕文   

  1. 汕头大学化学系;西北大学化学系
  • 发布日期:2003-06-15

Phase Equilibrium of the Ternary Systems LaX_3-PIAP-H_2O (X~- = ClO_4~-, NO_3~-, Cl~-) at 30 ℃

Hao Zhifeng;Liang Hongbin;Tang Zongxun;Yu Lin;Yu Jian;Fang Yiwen   

  1. Department of Chemistry, Shantou University;Department of Chemistry, Northwest University
  • Published:2003-06-15

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测定了三个三元体系LaX_3-PIAP-H_2O（X~- = ClO_4~-，NO_3~-，Cl~-， PIAP为4－（邻苯二甲酰基）亚基安替比林）在30℃时的溶解度。研究发现La (NO_3)_3-PIAP-H_2O和LaCl_3-PIAP-H_2O体系均为简单共饱型；La(ClO_4)_3- PIAP-H_2O体系有一个新固相形成，其组成为La(PIAP)_3（ClO_4）_3·4H_2O和体 系均为简单共饱型；La(ClO_4)_3-PIAP-H_2O体系的相平衡研究结果，合成了相应 的镧系配合物Ln(PIAP)_3(ClO_4)_3·4H_2O(Ln = La, Pr, Nd, Sm, Gd, Yb)，通 过化学分析、元素分析TG-DTG'IR谱和密度对化合物进行了表征。

关键词: 高氯酸镧, 硝酸镧, 氯化镧, 安替比林, 溶解度, 元素分析, 热重量分析, 红外分光光度法, 相平衡, 镨络合物

The solubilities of three ternary systems LaX_3-PIAP-H_2O (X~- = C1O_4~-, NO_3~-, Cl~-; PIAP =phthalimidoantipyrine, G_(19)H_(15) N_3O_3) were determined at 30℃. It is discovered that the systems La (NO_3)_3-PIAP-H_2O and LaCl_3-PIAPH_2O are simple eutonic type, while the system La(C1O_4)_3-PIAP-H_20 contains a new solid phase, the composition of which is La(PIAP)_3(C10_4)_3·4H_20 that is an incongruent compound. Based on the phase equilibrium of the system La (C10_4)_3-PIAP-H_20, the corresponding lanthanide complexes Ln(PIAP)_3 (C10_4)_3·4H_20 (Ln=La, Pr, Nd, Sm, Gd, Yb) were synthesized and characterized by chemical analysis, elemental analysis, TG-DTG, IR spectra and density.

Key words: lanthanum perchlorate, lanthanum chloride, lanthanum nitrate, ANTIPYRINU, SOLUBILITY, ELEMENTAL ANALYSIS, TG, IR, PHASE EQUILIBRIUM, PRASEODYMIUM COMPLEX

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