烃基膦酸单十六烷基酯的结构与其萃取镱(III)、镥(III)性能的 关系

探讨了一类具有高位阻特征的烃基膦酸单十六烷基酯萃取剂R^1(R^2O)P(O)OH从氯化物介质中萃取Yb(III)和Lu(III)的结构与性能关系。其中,R^1分别为CH~3,C~2H~5,i-C~3H~7,cyclo-C~6H~1~1和C~6H~5,R^2为C~4H~9CH(C~2H~5)C~2H~4CH(C~6H~1~3)或C~6H~1~3CH(CH~3)CH~2CH(C~6H~1~3)。结果表明,这类萃取剂对于Yb,Lu的萃取和分离能力随着其分子中取代基空间位阻的增大而降低。

Relationships between the structure of monohexadecyl hydrocarbylphosphonates and their behaviour in extraction of Yb(III) and Lu(III)

The structure-behaviour relationships of a class of highly hindered monohexadecyl hydrocarbylphosphonates, R^1(R^2O)P(O)OH, where R^1 represents CH~3, C~2H~5, i-C~3H~7, cyclo-C~6H~1~1 or C~6H~5, and R^2 represents C~4H~9CH(C~2H~5)C~2H~4CH(C~6H~1~3) or C~6H~1~3CH(CH~3) CH~2CH(C~6H~1~3), in the extraction of Yb(III) and Lu(III) from chloride medium are investigated. The results show that the extraction and separation abilities for Yb and Lu decrease with increasing the steric hindrance of the substituents in extractant molecules.