2－乙基己基膦酸单2－乙基己基酯萃取镧系元素的NMR研究

The NMR Study of 2-(ethylhexy1) Phosphonic Acid Mono-2-ethylhexyl Ester and Lanthanides Complexes

本研究测定了２－乙基己基膦酸单２－乙基己基酯（ＨＥＨ／ＥＨＰ）与镧系元素镧、铈、镨、钕、钐、铕、钬、铒、镱、镥的１Ｈ、（１３）Ｃ、（３１）Ｐ核磁共振谱。对ＨＥＨ／ＥＨＰ的碳骨架进行了详细归属，并根据（３１）ＰＮＭＲ谱峰的积分面积，推测了萃合物可能的配位络合比，（ＨＥＨ／ＥＨＰ与Ｌｎ（Ⅲ）之比）。对铕、镱、镥为６，对铒为５，对钬、钐为４。

This paper describes our initial effors in the use of NMR techuique for the study of the solution structure of HEH/EHP complexes with lanthanides. We investigate the coordination number of the complex and propose the possible reaction mechanism in CDCL_3 solution.