中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (5): 1-5.

• 研究论文 •    下一篇

高位阻有机磷萃取剂的研究 Ⅲ.叔丁基膦酸单烷基酯的合成及其结构与萃取镱、镥性能的关系

叶伟贞, 许庆仁, 沈定璋   

  1. 中国科学院上海有机化学研究所, 上海 200032
  • 收稿日期:1991-07-25 修回日期:1992-03-23 出版日期:1992-10-10 发布日期:1992-10-10

STUDIES ON HIGHLY STERICALLY HINDERED ORGANOPHOSPHORUS EXTRACTANTS Ⅲ. SYNTHESIS OF MONOALKYL t-BUTYLPHOSPHONATES AND RELATIONSHIP BETWEEN THEIR STRUCTURES AND EXTRACTION BEHAVIOUR ON Yb(Ⅲ), Lu(Ⅲ)

Ye Weizhen, Xu Qingren, Shen Dingzhang   

  1. Shanghai Institute of Organic chemistry, Academia Sinica, Shanghai 200032
  • Received:1991-07-25 Revised:1992-03-23 Published:1992-10-10 Online:1992-10-10

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摘要： 合成了一系列具有高位阻特征的叔丁基膦酸单烷基酯t-C4H9P(O)(OR)OH(R分别为n-C8H17,-CH2CH(C2H5)C4H9,-CH(CH3)C6H13,-CH3CH2CH(CH3)CH2C(CH3)3和n-C12H25)。初步探讨了它们的结构与萃取重稀土元素Yb(Ⅲ)和Lu(Ⅲ)性能的关系。萃取能力随着酯烷基空间位阻的增大而显著降低。在pH1/2值与酯烷基的Charton空间参数v间存在着近似的直线关系。叔丁基膦酸单烷基酯对Yb、Lu的反萃性能优于2-乙基己基膦酸单2-乙基己酯(P-507)。

关键词: 叔丁基膦酸单烷基酯, 萃取, 镱(Ⅱ), 镥(Ⅲ)

Abstract: A new series of monoalkyl t-butylphosphonates (MAtBP) with highly steric hindrance, t-C4H9P(O)(OR)OH, where R represents n-C5H17,-CH2CH(C2H5)C4H9,-CH(CH3)C6H13,-CH2CH2CH(CH3)CH2C(CH3)3 and n-C12H25, respectively, were synthesized and the relationship between their structure and extraction behaviour on Yb(Ⅲ), Lu(Ⅲ)Was investigated. Their extraction ability markedly decreases with the increase of the steric hindrance from ester alkyl group. There is an approximate linear correlation between pH1/2 values and Charton steric parameter v of the ester alkyl groups. The stripping behaviour of Yb, Lu with MAtBP is superior to that with mono-2-ethylhexyl 2-ethylhexylphosphonate (P-507).

Key words: monoalkyl t-butylphosphonate, extraction, Yb(Ⅲ), Lu(Ⅲ)

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