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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (5): 701-706. 上一篇    下一篇

研究论文

稀土离子-1,10-菲罗啉桥联胺二元配合物的稳定性研究

汪中明;周志芬;林华宽;徐猛;刘天府;朱守荣;孙宏伟;陈荣悌   

  1. 南开大学化学系.天津(300071)
  • 发布日期:2001-05-15

Studies on the stability of rare earth ion -N,N'-1,10- phenanthroline -2,9-dimethanamine binary complexes

Wang Zhongming;Zhou Zhifen;Lin Huakuan;Xu Meng;Liu Tianfu;Zhu Shourong;Sun Hongwei;Chen Rongti   

  1. Nankai Univ, Dept Chem.Tianjin(300071)
  • Published:2001-05-15

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608

被引次数

6

在(25±0.1)℃，Ⅰ＝0.1mol·dm^-3NaClO~4的条件下，用pH电位滴定法测定了配体N,N'-二取代基-1,10-菲罗啉-2,9-二甲胺(LI～I6,取代基分别对于甲基、乙基、正丙基、异丙基、叔丁基)在水溶液中分别与稀土离子Lu[Lu=La(Ⅲ),Ce(Ⅲ),Pr(Ⅲ),Nd(Ⅲ),Sm(Ⅲ),Eu(Ⅲ),Gd(Ⅲ),Tb(Ⅲ),Dy(Ⅲ),Ho(Ⅲ)]的二元配合物的稳定常数，提出了配合物在溶液中的可能结构，对金属离子和取代基的大小对配合物稳定性的影响进行了详细的讨论，动用线性回归，对有放射性的Pm(Ⅲ)与相应配体的二元配合物的稳定常进行了推测。

关键词: 二氮杂菲P, 稀土金属络合物, 稳定性, 多胺

The stability constants of Lu[Lu=La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ), Nd(Ⅲ), Sm( Ⅲ), Eu(Ⅲ),Gd(Ⅲ), Tb(Ⅲ), Dy(Ⅲ), Ho(Ⅲ),L=N,N'- dialkyl- 1,10- phenanthroline -2,9- dimethanamine, in which alkyl group denotes --- CH~3, CH~2CH~3, -----(CH~2)~2CH~3, ----(CH~2)~3CH~3,----CH(CH~3)~2,---- C(CH~3)~3]binary complexes hace been determined by pH potentiometric titration method at (25±0.1)℃, Ⅰ＝0.1mol· dm^-3NaClO~4. The probable structures of the corresponding complexes were proposed. The influence of the metal ions and the substituents on the stability of binary complexes is reported in detail. The stability difference between the complexes of rare earth ion and the corresponding complexes of Cu(Ⅱ) ion is also discussed. The stability constants of the corresponding binary complex of radioactive Pm(Ⅲ) ion are estimated by linear regression.

Key words: PHENANTHROLINE P, RARE EARTH METAL COMPLEX, STABILITY, POLYAMINE

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