The impact of alicyclic substituents on the extraction ability of new family of 1,10-phenanthroline-2,9-diamides

Development of efficient extractants for the separation of actinides and lanthanides in the technologies of nuclear fuel cycle is one of the most urgent and complex tasks in modern nuclear energetics. New family of 4,7-dichloro-1,10-phenanthroline-2,9-dicarboxylic acid diamides based on cyclic amines was synthesized and shown to exhibit high selectivity in the La/Am pair separation (SF (Am/La ≈ 10)) and in the Am/Eu pair separation (SF (Am/Eu ≈ 12)). It was shown that pyrrolidine derived diamide is more efficient extractant for americium, curium and lanthanides from highly acidic HNO3 solution than its non-cyclic N,N,N′,N′-tetraalkyl analogues. The structures of synthesized compounds were studied in details by IR, NMR spectroscopy, and single crystal X-ray diffraction. According to spectroscopy data, incorporation of aromatic rings to the amide fragment of ligand leads to complex dynamic behavior in solutions what is believed to strongly affect the extraction ability of synthesized ligands. © 2020 The Royal Society of Chemistry.

Authors
Lemport P.S.1 , Matveev P.I.1 , Yatsenko A.V.1 , Evsiunina M.V.1 , Petrov V.S.1 , Tarasevich B.N.1 , Roznyatovsky V.A.1 , Dorovatovskii P.V. 2 , Khrustalev V.N. 3, 4 , Zhokhov S.S.1 , Solov'Ev V.P.5 , Aslanov L.A.1 , Petrov V.G.1 , Kalmykov S.N.1 , Nenajdenko V.G. 1 , Ustyniuk Y.A.1
Journal
Number of issue
44
Language
English
Pages
26022-26033
Status
Published
Volume
10
Year
2020
Organizations
  • 1 Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
  • 2 National Research Center, Kurchatov Institute, Russian Federation
  • 3 Department of Inorganic Chemistry, Peoples' Friendship University of Russia (RUDN University), Russian Federation
  • 4 N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Russian Federation
  • 5 Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Russian Federation
Keywords
Actinides; Amides; Amines; Europium compounds; Extraction; Ligands; Nuclear fuel reprocessing; Nuclear magnetic resonance spectroscopy; Rare earth elements; Single crystals; Aromatic rings; Complex dynamic behavior; Complex task; Cyclic amines; High selectivity; Nuclear fuel cycles; Single crystal x-ray diffraction; Spectroscopy data; Lanthanum compounds
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