Small Cyclic Diglycolamides: Tautomerism, Solvent Extraction and Coordination with f-Elements: One Strain to Rule Them All

Mikhail A Kalinin; Mariia V Evsiunina; Paulina Kalle; Konstantin A Lyssenko; Petr I Matveev; Nataliya E Borisova

doi:10.1021/acs.inorgchem.3c03488

Small Cyclic Diglycolamides: Tautomerism, Solvent Extraction and Coordination with f-Elements: One Strain to Rule Them All

Inorg Chem. 2024 Jan 8;63(1):602-612. doi: 10.1021/acs.inorgchem.3c03488. Epub 2023 Dec 19.

Authors

Mikhail A Kalinin¹, Mariia V Evsiunina¹, Paulina Kalle², Konstantin A Lyssenko¹, Petr I Matveev¹, Nataliya E Borisova¹

Affiliations

¹ Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 bld. 3, Moscow 119991, Russia.
² N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr. 31, Moscow 119991, Russia.

PMID: 38112309
DOI: 10.1021/acs.inorgchem.3c03488

Abstract

The search for new effective extractants is an important task for the management of high-level liquid waste (HLW) generated during the reprocessing of spent nuclear fuel. Here, we synthesized a series of diglycolamides with cyclic substituents for the first time. We disclosed their coordination with f-element nitrates [La(NO₃)₃ and UO₂(NO₃)₂] by SC-XRD study and complexation properties toward Am(III), Ln(III), and U(VI) during solvent extraction from nitric acid solutions. Using dynamic nuclear magnetic resonance (NMR) and density functional theory (DFT) calculations, the importance of tautomerism in the extraction properties of diglycolamides was shown.