Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1 bld. 3, Moscow 119991, Russia.
National Research Center "Kurchatov Institute", Moscow 123182, Russia.
Int J Mol Sci. 2023 Jun 17;24(12):10261. doi: 10.3390/ijms241210261.
A reaction of acyl chlorides derived from 1,10-phenanthroline-2,9-dicarboxylic acids with piperazine allows the preparation of the corresponding 24-membered macrocycles in good yield. The structural and spectral properties of these new macrocyclic ligands were thoroughly investigated, revealing promising coordination properties towards f-elements (Am, Eu). It was shown that the prepared ligands can be used for selective extraction of Am(III) from alkaline-carbonate media in presence of Eu(III) with an SF up to 40. Their extraction efficiency is higher than calixarene-type extraction of the Am(III) and Eu(III) pair. Composition of macrocycle-metal complex with Eu(III) was investigated by luminescence and UV-vis spectroscopy. The possibility of such ligands to form complexes of L:Eu = 1:2 stoichiometry is revealed.
酰氯与 1,10-菲啰啉-2,9-二羧酸反应，可以高产率制备相应的 24 元大环。这些新的大环配体的结构和光谱性质得到了彻底的研究，显示出对 f 族元素（Am、Eu）有良好的配位性能。结果表明，在存在 Eu(III)的情况下，所制备的配体可用于从碱性碳酸盐介质中选择性萃取 Am(III)，分离因子高达 40。它们的萃取效率高于杯芳烃型萃取 Am(III)和 Eu(III)对。通过荧光和紫外可见光谱研究了大环-金属配合物与 Eu(III)的组成。揭示了这种配体形成 L:Eu = 1:2 化学计量比配合物的可能性。
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