Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 bld. 3, Moscow 119991, Russia.
National Research Center "Kurchatov Institute", 123098 Akademika Kurchatova sqr., 1, Moscow 123098, Russia.
Inorg Chem. 2022 Jan 10;61(1):384-398. doi: 10.1021/acs.inorgchem.1c02982. Epub 2021 Dec 22.
Reprocessing of spent nuclear fuel (SNF) is an important task in a frame of ecology and rational use of natural resources. Uranium, as the main component of SNF (>95%), can be recovered for further use as fresh nuclear fuel. To minimize an amount of solid radioactive waste generated during SNF reprocessing, new extractants are under investigation. Diamides of 1,10-phenanthroline-2,9-dicarboxylic acid are perspective tetradentate N-donor ligands that form strong complexes with -elements, which are soluble in polar organic solvents. As an example of three ligands of this class, we conducted a comparative study and showed how the substituent in the amide functional group affects the extraction ability toward uranyl nitrate from nitric acid media. We have performed a careful study (NMR, FT-IR, XRD, RMC-EXAFS) of the structures of synthesized complexes of new ligands with uranyl nitrate and used quantum mechanical calculations to explain the discovered regularities through.
乏核燃料（SNF）的再处理是生态和合理利用自然资源框架中的一项重要任务。铀是 SNF 的主要成分（>95%），可回收用于进一步作为新鲜核燃料使用。为了最大限度地减少 SNF 再处理过程中产生的固体放射性废物量，正在研究新的萃取剂。1,10-菲咯啉-2,9-二羧酸的二酰胺是有前景的四齿 N 供体配体，可与 - 元素形成强配合物，这些配合物可溶于极性有机溶剂。作为此类三种配体的一个示例，我们进行了比较研究，展示了酰胺官能团中的取代基如何影响从硝酸介质中萃取硝酸铀酰的能力。我们对新配体与硝酸铀酰形成的配合物的结构进行了仔细的研究（NMR、FT-IR、XRD、RMC-EXAFS），并通过量子力学计算来解释所发现的规律。
