Volume 58, Issue 10 pp. 3021-3026
Communication

Structural Snapshots of Cluster Growth from {U6} to {U38} During the Hydrolysis of UCl4

Dr. Lucile Chatelain

Dr. Lucile Chatelain

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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Radmila Faizova

Radmila Faizova

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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Dr. Farzaneh Fadaei-Tirani

Dr. Farzaneh Fadaei-Tirani

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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Jacques Pécaut

Jacques Pécaut

Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, UMR 5819 Equipe Chimie Interface Biologie pour l'Environnement la Santé et la Toxicologie, 17 Rue des Martyrs, 38000 Grenoble, France

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Prof. Marinella Mazzanti

Corresponding Author

Prof. Marinella Mazzanti

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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First published: 02 January 2019
Citations: 34

Graphical Abstract

Growing on U: Large UIV clusters slowly assemble in organic solution, upon controlled hydrolysis of UCl4, from a hexanuclear {U6} cluster. The process is time dependent and is affected by temperature and added base.

Abstract

Herein we report the assembly of large uranium(IV) clusters with novel nuclearities and/or shapes from the controlled hydrolysis of UCl4 in organic solution and in the presence of the benzoate ligands. {U6}, {U13}, {U16}, {U24}, {U38} oxo and oxo/hydroxo clusters were isolated and crystallographically characterized. These structural snapshots indicate that larger clusters are slowly built from the condensation of octahedral {U6} building blocks. The uranium/benzoate ligand ratio, the reaction temperature and the presence of base play an important role in determining the structure of the final assembly. Moreover, the isolation of different size cluster {U6} (few hours), {U16} (3 days), {U24} (21 days) from the same solution in a chosen set of conditions shows that the assembly of uranium oxo clusters in hydrolytic conditions is time dependent.

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