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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A first phosphine oxide-based extractant with high Am/Cm selectivity
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A first phosphine oxide-based extractant with high Am/Cm selectivity

机译:基于磷酸氧化物的萃取剂,具有高AM / CM选择性

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摘要

A new phosphine oxide ligand demonstrates high selectivity for the Am-Cm pair with SF = 2.9-3.5 and the Am-Eu pair with SF = 7.3-8.5 in a range of 0.1-3 M nitric acid. Thermodynamic measurements show that the entropy factor is responsible for selectivity observed in the extraction experiment. The most prevalent complexes of all three metal ions were (Ph2PyPO)(2)M(NO3)(3). According to their DFT modelling, the M-N distances for the Cm ion were larger than those for Am, so the last ion enters deeper into the pseudo-cavity of the ligand, which causes the observed selectivity.
机译:一种新的氧化膦配体,表明了与SF = 2.9-3.5的AM-CM对的高选择性,AM-EU对,含有0.1-3M硝酸的范围内的SF = 7.3-8.5。 热力学测量表明,熵因子负责在提取实验中观察到的选择性。 所有三种金属离子的最普遍的复合物是(pH2PYPO)(2)M(NO 3)(3)。 根据其DFT建模,CM离子的M-N距离大于AM的M-N距离,因此最后的离子进入更深的位于配体的伪腔中,这导致观察到的选择性。

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