高等学校化学学报 ›› 1980, Vol. 1 ›› Issue (1): 17.

• 论文 • 上一篇    下一篇

乙二胺四乙酸根合钍与某些氨基酸的络合反应

罗勤慧1, 孟静霞2   

  1. 1. 南京大学配位化学研究所;
    2. 南京师范学院化学系
  • 收稿日期:1979-12-18 出版日期:1980-06-24 发布日期:1980-06-24

COMPLEX FORMATION OF Th(edta)CHELATE WITH SOME AMINO-ACIDS

Luo Qinhui1, Meng Jingxia2   

  1. 1. Coordination Chemistry Research Institute, Nanjing University;
    2. Department of Chemistry, Nanjing Normal College
  • Received:1979-12-18 Online:1980-06-24 Published:1980-06-24

摘要: 用电位法研究含有Th(NO3)4的乙二胜四乙酸二钠盐与某些氨基酸(丝氨酸、苏氨酸、白氨酸、α-氨基异丁酸)溶液的络合反应,证明有1:1:1的混合络合物生成,并测得在30°±0.1℃及离子强度μ=0.15(KNO3)时的稳定常数logKThYLThY.其稳定性按次级配体排列有如下顺序:α-氨基异丁酸>白氨酸>苏氨酸≌丝氨酸,该顺序与次级配体的碱度顺序一致,可以用下式表示:logThYLThY=1.40pKHL-8.29.

Abstract: The solutions containing equimolar thorium nitrate,EDTA and an amino-acid (serine,threonine,leucine,or a-amino-isobutyric acid) have been investigated potentiometrically.The results indicate the formation of 1:1:1 mixed ligand chelates.The formation constants logKThYLThY at 30°±0.1℃ and ionic strength μ=0.15 (KNO3) have been calculated.The order of stabilities in terms of the secondary ligand amino-acids,is as follows.a-amino-isobuturic>leucine>threonine=serine.This order agrees with that of the basicity of the amino-acids and can be represented by a linear equation

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