Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing

M A Gerasimov; A S Pozdeev; M V Evsiunina; P Kalle; N R Yarenkov; N E Borisova; P I Matveev

doi:10.1021/acs.inorgchem.3c03944

Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing

Inorg Chem. 2024 Jan 29;63(4):2109-2121. doi: 10.1021/acs.inorgchem.3c03944. Epub 2024 Jan 18.

Authors

M A Gerasimov¹, A S Pozdeev², M V Evsiunina¹, P Kalle³, N R Yarenkov¹, N E Borisova¹, P I Matveev¹

Affiliations

¹ Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
² Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States.
³ N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russia.

PMID: 38237044
DOI: 10.1021/acs.inorgchem.3c03944

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.