Abstract

A series of (2-carbamoylethyl)diphenylphosphine oxides (CEPO) has been synthesized from commercially available reagents: chlorodiphenylphosphine and acrylamides. Effect of coordinating fragments Ph₂P(O)(CH₂)₂C(O), nature of oligoyl group that binds these fragments, and the presence of additional coordinating centers in CEPO on extraction properties toward actinides and lanthanides has been studied. It has been found that N,N′-methylene-bis[3-(diphenylphosphoryl)propionamide] (III) containing two diphenylphosphorylpropionyl fragments bound by rigid HNCH₂NH linker shows the highest efficiency in extraction of actinides (recovery extent is ∼73% for U(VI) and ~85% for Th(IV)), whereas ligand V containing the maximum number of such phosphorylcarbonyl groups in conformationally non-rigid nitrogen heterocyclic matrix and CEPO (II) containing additional C=O group in the alkyl fragment at the nitrogen atom of carbamoyl fragment exhibit considerable preference in the extraction of lanthanides (extraction of gadolinium with this compound is close to 92%). Obtained data display that highly efficient and selective extractants for both 4f and 5f elements can be constructed on the basis of (2-carbamoylethyl)diphenylphosphine oxides.

中文翻译：

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(2-氨基甲酰乙基)二苯基氧化膦衍生物：锕系和镧系元素的合成和萃取性能

摘要

由市售试剂：氯二苯膦和丙烯酰胺合成了一系列（2-氨基甲酰基乙基）二苯膦氧化物（CEPO）。研究了配位片段 Ph ₂ P(O)(CH ₂ ) ₂ C(O)、结合这些片段的寡酰基的性质以及 CEPO ​​中其他配位中心的存在对锕系元素和镧系元素提取性能的影响。研究发现，含有两个由刚性 HNCH _{2 NH 连接体结合的二苯基磷酰基丙酰基片段的}N , N '-亚甲基-双[3-(二苯基磷酰基)丙酰胺] (III) 在锕系元素的提取中表现出最高的效率（回收率约为 73%）对于 U(VI) 和 Th(IV) 约 85%），而配体 V 在构象非刚性氮杂环基质中含有最大数量的此类磷酰基羰基，而 CEPO ​​(II) 在烷基片段中含有额外的 C=O 基团氨基甲酰基片段的氮原子在镧系元素的萃取中表现出相当大的优先性（用该化合物萃取钆接近 92%）。获得的数据表明，可以基于(2-氨基甲酰乙基)二苯基氧化膦构建高效、选择性的4f和5f元素萃取剂。