Structural Insight into Complexation Ability and Coordination of Uranyl Nitrate by 1,10-Phenanthroline-2,9-diamides.

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 f-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.

Citation

S V Gutorova, P I Matveev, P S Lemport, A L Trigub, A S Pozdeev, A V Yatsenko, B N Tarasevich, E A Konopkina, E K Khult, V A Roznyatovsky, Yu V Nelyubina, K L Isakovskaya, V N Khrustalev, V S Petrov, A S Aldoshin, Yu A Ustynyuk, V G Petrov, S N Kalmykov, V G Nenajdenko. Structural Insight into Complexation Ability and Coordination of Uranyl Nitrate by 1,10-Phenanthroline-2,9-diamides. Inorganic chemistry. 2022 Jan 10;61(1):384-398

PMID: 34936342

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