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Konopkina EA, Pavlova EA, Gopin AV, Kalle P, Chernysheva MG, Nechitailova IO, Guda AA, Petrov VG, Borisova NE, Matveev PI. Role of H + in Solvent Extraction of Am(III) and Eu(III) Using a Polydentate Bipyridine N-,O-Donor Ligand: Chemical Equilibrium States and Kinetic Aspects. J Phys Chem B 2024. [PMID: 39700411 DOI: 10.1021/acs.jpcb.4c06244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2024]
Abstract
In this work, the influence of protonation on the kinetics and thermodynamics of extraction of the Am/Eu pair using N-heterocyclic dicarboxylic acid diamide N,N'-diethyl-N,N'-bis(4-ethylphenyl)-[2,2'-bipyridine]-6,6'-dicarboxamide (L) was investigated. The extraction efficiency of the ligand did not decrease, even at a nitric acid concentration 4 times higher than that of the ligand in the organic phase. X-ray diffraction analysis established that protonation leads to the preorganization of the ligand due to the reversal of bipyridyl rings into the binding conformation when both nitrogen atoms are turned to one side. Also, the effect of protonation on the chemical shifts of the functional binding groups (bipyridyl and amide) in solution was demonstrated by NMR spectroscopy. However, the presaturation of the organic phase with nitric acid did not lead to significant changes in the surface activity of the ligand. For extraction kinetics, a mechanism was proposed in which protonation and preorganization of the ligand was the limiting stage.
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Affiliation(s)
- Ekaterina A Konopkina
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Elizaveta A Pavlova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Alexander V Gopin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Paulina Kalle
- N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russian Federation
| | - Maria G Chernysheva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Irina O Nechitailova
- The Smart Materials Research Institute, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Alexander A Guda
- The Smart Materials Research Institute, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Vladimir G Petrov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Petr I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
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Gerasimov MA, Matveev PI, Evsiunina MV, Khult EK, Kalle P, Petrov VS, Lemport PS, Petrov VG, Kostikova GV, Ustynyuk YA, Nenajdenko VG. Influence of Diluent on Extraction Parameters of Systems for Separation Am(III) and Ln(III) Based on 1,10-Phenanthroline-2,9-Diamide. Molecules 2024; 29:3548. [PMID: 39124953 PMCID: PMC11313845 DOI: 10.3390/molecules29153548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 07/24/2024] [Accepted: 07/25/2024] [Indexed: 08/12/2024] Open
Abstract
A systematic study of extraction systems for the separation of f-elements using the tetradentate N,O-donor diamide of 1,10-phenanthroline-2,9-dicarboxylic acid (L) in various molecular and ionic solvents was performed. It was demonstrated that the nature of a diluent has a significant impact on solvent extraction of Am(III) and Ln(III) and the stoichiometry of formed complexes with f-elements. The mechanism of complexation and forms of complexes in different diluents were investigated by radiometric methods, UV-vis titration, and XRD.
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Affiliation(s)
- Mikhail A. Gerasimov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Petr I. Matveev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Mariia V. Evsiunina
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Enni. K. Khult
- Department of Materials Science, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Paulina Kalle
- N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russia;
| | - Valentine S. Petrov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Pavel S. Lemport
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Vladimir G. Petrov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Galina V. Kostikova
- Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, Moscow 119071, Russia;
| | - Yuri A. Ustynyuk
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
| | - Valentine G. Nenajdenko
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia; (M.A.G.); (P.I.M.); (M.V.E.); (V.S.P.); (V.G.P.); (Y.A.U.)
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Gerasimov MA, Pozdeev AS, Evsiunina MV, Kalle P, Yarenkov NR, Borisova NE, Matveev PI. Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing. Inorg Chem 2024; 63:2109-2121. [PMID: 38237044 DOI: 10.1021/acs.inorgchem.3c03944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
In this work, we studied the extraction systems for the separation f-elements based on the tetradentate N,O-donor ligand di(N-ethyl-4-ethylanilide) 2,2'-dipyridyl-6,6'-dicarboxylic acid (L). The organic phase of these systems was perspective fluorine-containing organic solvents-metanitrobenzotrifluoride (F-3), ionic liquid C4mimNTf2 (IL), and their mixture. The increase of Am(III) selectivity in the presence of Ln(III) in cases of the diluent mixture was shown. The mechanism of the f-element complexation leading to the improved properties of the extraction systems was studied by UV-visible, Raman-spectroscopy, XRD-study, and density functional theory calculations.
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Affiliation(s)
- M A Gerasimov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - A S Pozdeev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - M V Evsiunina
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - P Kalle
- N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russia
| | - N R Yarenkov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - N E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - P I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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