Competitive Coordination of Uranium(VI) and Thorium(IV) by Tetradentate Phenanthroline Ligands: Structural and Spectroscopic Investigation of U(VI)-Th(IV) Mixed Ion Pair Formation

Q: What does this research mean for the field?

Tetradentate phenanthroline ligands competitively coordinate Uranium(VI) and Thorium(IV) to form structurally and spectroscopically distinct U(VI)-Th(IV) mixed ion pairs. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Svetlana Gutorova; Petr I. Matveev; Mariia V. Evsiunina; Qiushi Wang; Pavel S. Lemport; Paulina Kalle; Daniil S. Koshelev; Valentina V. Utochnikova; Alexey A. Averin; Tatiana Poliakova; Mikhail A. Gerasimov; Vladimir G. Petrov; Yuri Ustynyuk; STEPAN KALMYKOV; Valentine Nenajdenko

doi:10.1039/d6dt00392c

January 1, 2026Dalton Transactions

Competitive Coordination of Uranium(VI) and Thorium(IV) by Tetradentate Phenanthroline Ligands: Structural and Spectroscopic Investigation of U(VI)-Th(IV) Mixed Ion Pair Formation

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Key Points

This research explores the coordination properties of tetradentate phenanthroline ligands with uranium(VI) and thorium(IV).
Investigated structural properties of U(VI)-Th(IV) mixed ion pairs using spectroscopy.
Analyzed extraction efficiency of uranium(VI) from nitric acid solutions using ligands.
Studied the competitive coordination behavior of ligands towards both actinides.
Tetradentate ligands show high coordination affinity for uranium(VI) under specified conditions.
Mixed ion pairs were successfully formed, indicating competitive behavior towards thorium(IV).
Structural data provide insights into ligand efficiency in actinide extraction.

Implication

Competitive coordination of uranium(VI) and thorium(IV) is analyzed through structural and spectroscopic methods.

Abstract

Tetradentate phenanthroline-based ligands have demonstrated ability to efficiently extract uranium(VI) from nitric acid solutions. While their coordination with U(VI) has been extensively studied, their behavior toward tetravalent actinides under conditions...

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Cite This Study

Gutorova et al. (2026) studied this question.

synapsesocial.com/papers/6a23bc2a71a5da9775e779be https://doi.org/10.1039/d6dt00392c

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Competitive Coordination of Uranium(VI) and Thorium(IV) by Tetradentate Phenanthroline Ligands: Structural and Spectroscopic Investigation of U(VI)-Th(IV) Mixed Ion Pair Formation

Key Points

Implication

Abstract

Discussion

Cite This Study

Competitive Coordination of Uranium(VI) and Thorium(IV) by Tetradentate Phenanthroline Ligands: Structural and Spectroscopic Investigation of U(VI)-Th(IV) Mixed Ion Pair Formation

Key Points

Implication

Abstract

Discussion

Cite This Study

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