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 amine...

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Published in:RSC advances 2020-07, Vol.1 (44), p.2622-2633
Main Authors: Lemport, Pavel S, Matveev, Petr I, Yatsenko, Alexander V, Evsiunina, Mariia V, Petrov, Valentine S, Tarasevich, Boris N, Roznyatovsky, Vitaly A, Dorovatovskii, Pavel V, Khrustalev, Victor N, Zhokhov, Sergey S, Solov'ev, Vitaly P, Aslanov, Leonid A, Petrov, Vladimir G, Kalmykov, Stepan N, Nenajdenko, Valentine G, Ustyniuk, Yuri A
Format: Article
Language:English
Subjects:
Actinides
Americium
Amines
Aromatic compounds
Chemistry
Coordination compounds
Crystallography
Curium
Dicarboxylic acids
Infrared spectroscopy
Lanthanides
Ligands
NMR spectroscopy
Nuclear fuel cycle
Selectivity
Separation
Single crystals
Spectrum analysis
Synthesis
Task complexity
X ray analysis
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Summary: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 HNO 3 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. Some unexpected "structure-extraction properties" patterns were found for new family of 1,10-phenanthroline-2,9-diamide derived ligands.
ISSN:2046-2069
2046-2069
DOI:10.1039/d0ra05182a