中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (5): 71-73.

• 研究论文 • 上一篇    下一篇

铈(Ⅲ)、铈(Ⅳ)与植酸生成的固态配合物的研究

黎晓霞, 杨瑛, 刘建民, 杨汝栋   

  1. 兰州大学化学系, 兰州 730000
  • 收稿日期:1996-11-20 修回日期:1997-05-26 出版日期:1997-10-10 发布日期:1997-10-10

Study on the Solid Complexes of Ce(Ⅲ)and Ce(Ⅳ)with Phytic Acid

Li Xiaoxia, Yang Ying, Liu Jianmin, Yang Rudong   

  1. Department of Chemistry, Lanzhou University, Lanzhou 730000
  • Received:1996-11-20 Revised:1997-05-26 Published:1997-10-10 Online:1997-10-10

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505

被引次数

1

摘要： 植酸(H12IHP)作为沉淀剂已被用于 Th4+的定量测定[1]和 Sc3+的分离提取[2]. 但尚未见有关固态镧系植酸配合物组成与性质的研究报道. 本文研究了Ce(Ⅲ)、Ce(Ⅳ)与植酸生成的固态配合物的组成与性质, 比较了二者性质上的差异, 研究了它们的热分解行为及动力学参数(反应级数及活化能), 通过磁矩测定, 监测了 Ce(Ⅳ)的植酸配合物热分解过程中氧化态的变化, 通过X光粉末衍射和化学分析确定了Ce(Ⅳ)固态配合物热分解产物的组成。

关键词: 铈(Ⅲ), 铈(Ⅳ), 植酸, 固态配合物

Abstract: The ceric and cerous solid complexes with phytic acid were synthesized and chara cterized by means of elemental analysis, IR and TG-DTA. The results show that under the experimental conditions for Ce(Ⅲ)only one form complex is formed:[(C6H6)H4(PO4)6]3Ce8·13H2O(Ⅰ), but two complexes were formed for Ce(Ⅳ):[(C6H6)H4(PO4)6]3·Ce8·9H2O(Ⅱ)and [(C6H6)(PO4)6]3[Ce(OH)]12·9H2O(Ⅲ); the thermal stability of(Ⅲ)was less than that of(Ⅰ). On thermal decomposition the ceric was reduced to cerous and the final product was CePO4.

Key words: ceric, cerous, phytic acid, solid complex

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