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Maltsev D, Driscoll DM, Zhang Y, Neuefeind JC, Reinhart B, Agca C, Ray D, Halstenberg PW, Aziziha M, Schorne-Pinto J, Besmann TM, Bryantsev VS, Dai S, Roy S, Ivanov AS. Transient Covalency in Molten Uranium(III) Chloride. J Am Chem Soc 2024; 146:21220-21224. [PMID: 39042490 PMCID: PMC11311222 DOI: 10.1021/jacs.4c05765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 07/02/2024] [Accepted: 07/03/2024] [Indexed: 07/25/2024]
Abstract
Uranium is arguably the most essential element in the actinide series, serving as a crucial component of nuclear fuels. While U is recognized for engaging the 5f orbitals in chemical bonds under normal conditions, little is known about its coordination chemistry and the nature of bonding interactions at extreme conditions of high temperature. Here we report experimental and computational evidence for the shrinkage of the average U-ligand distance in UCl3 upon the solid-to-molten phase transition, leading to the formation of a significant fraction of short, transient U-Cl bonds with the enhanced involvement of U 5f valence orbitals. These findings reveal that extreme temperatures create an unusual heterogeneous bonding environment around U(III) with distinct inner- and outer-coordination subshells.
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Affiliation(s)
- Dmitry
S. Maltsev
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Darren M. Driscoll
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yuanpeng Zhang
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Joerg C. Neuefeind
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Benjamin Reinhart
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Can Agca
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Debmalya Ray
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Phillip W. Halstenberg
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Mina Aziziha
- Mechanical
Engineering Department, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Juliano Schorne-Pinto
- Mechanical
Engineering Department, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Theodore M. Besmann
- Mechanical
Engineering Department, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Vyacheslav S. Bryantsev
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sheng Dai
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Santanu Roy
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander S. Ivanov
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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Dai S, Shin YS, Toth LM, Barnes CE. Comparative UV-Vis Studies of Uranyl Chloride Complex in Two Basic Ambient-Temperature Melt Systems: The Observation of Spectral and Thermodynamic Variations Induced via Hydrogen Bonding. Inorg Chem 1997; 36:4900-4902. [PMID: 11670174 DOI: 10.1021/ic970251h] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sheng Dai
- Chemical Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6181, and Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996-1700
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