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Hu SX, You XX, Zou WL, Lu E, Gao X, Zhang P. Electronic Structures and Unusual Chemical Bonding in Actinyl Peroxide Dimers [An 2O 6] 2+ and [(An 2O 6)(12-crown-4 ether) 2] 2+ (An = U, Np, and Pu). Inorg Chem 2022; 61:15589-15599. [DOI: 10.1021/acs.inorgchem.2c02399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shu-Xian Hu
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Xiao-Xia You
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Wen-Li Zou
- Institute of Modern Physics, Northwest University, Xi’an, 710127, China
| | - Erli Lu
- School of Natural and Environmental Sciences, Newcastle University, Newcastle NE1 7RU, United Kingdom
| | - Xiang Gao
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Ping Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
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Mhatre AM, Chappa S, Gupta SK, Pandey AK. LED based optical dip-probe spectrophotometer for in situ monitoring of uranyl and uranous ions in aqueous process stream. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Chen X, Li Q, Gong Y. Coordination Structures of the Uranyl(VI)–Diamide Complexes: A Combined Mass Spectrometric, EXAFS Spectroscopic, and Theoretical Study. Inorg Chem 2019; 58:5695-5702. [DOI: 10.1021/acs.inorgchem.9b00047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiuting Chen
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingnuan Li
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Yu Gong
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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Density functional theoretical analysis of structure, bonding, interaction and thermodynamic selectivity of hexavalent uranium (UO2 2+) and tetravalent plutonium (Pu4+) ion complexes of tetramethyl diglycolamide (TMDGA). Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1641-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sasaki K, Suzuki T, Arai T, Takao K, Suzuki S, Yaita T, Ikeda Y. Uranyl Species in 1-Ethyl-3-methylimidazolium Nitrate ([EMI][NO3]) Solution of [EMI]2[UO2(NO3)4]: First Spectrophotometric Evidence for Existence of [UO2(NO3)4]2−. CHEM LETT 2014. [DOI: 10.1246/cl.131183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Tomoya Suzuki
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
| | | | - Koichiro Takao
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
| | | | | | - Yasuhisa Ikeda
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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Maerzke KA, Goff GS, Runde WH, Schneider WF, Maginn EJ. Structure and Dynamics of Uranyl(VI) and Plutonyl(VI) Cations in Ionic Liquid/Water Mixtures via Molecular Dynamics Simulations. J Phys Chem B 2013; 117:10852-68. [DOI: 10.1021/jp405473b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - George S. Goff
- Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Wolfgang H. Runde
- Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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Warburton J, Smith N, Czerwinski K. Method for Online Process Monitoring for Use in Solvent Extraction and Actinide Separations. SEP SCI TECHNOL 2010. [DOI: 10.1080/01496395.2010.494085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Schlegel ML, Descostes M. Uranium uptake by hectorite and montmorillonite: a solution chemistry and polarized EXAFS study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:8593-8598. [PMID: 20028057 DOI: 10.1021/es902001k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The mechanism of U(VI) retention on montmorillonite and hectorite at high ionic strength (0.5 M NaCl) was investigated by solution chemistry and, at near-neutral pH, polarized EXAFS spectroscopy. Uranium(VI) sorption increases from pH 3 to 7 on the two clays, but with a steeper edge for hectorite. Uranium(VI) is no longer retained at pH > 9, presumably owing to the formation of soluble anionic complexes. Polarized EXAFS showed that U(VI) retains its uranyl conformation on montmorillonite (U_mont) and hectorite (U_hect), with uranyl O at 1.79(2) A for U_mont and 1.82(2) A for U_hect, and split equatorial O shells at 2.29(2) and 2.47(2) A (U_mont), or 2.35(2) and 2.53(2) A (U_hect). An additional atomic shell of approximately 0.5 Al/Si at 3.3 A is detected for U_mont, but neither the oxygen nor the cationic shell exhibit clear angular dependence. These results indicate the formation of mononuclear complexes at the edges of montmorillonite platelets, with the orientation of the uranyl axis equal to the magic angle, as constrained by the edges' structural properties. In contrast to U_mont, the U-O signal varies with the polarization angle in U_hect, and the cationic Mg/Si contribution at 3.2 A is weak. The structure of this surface complex is not completely elucidated; it may correspond either to sorption on silanol sites, or to coprecipitation. These results lay out the fundamental molecular-scale basis to understand U retention by neoformed clay layers of nuclear glasses.
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Affiliation(s)
- Michel L Schlegel
- CEA, DEN, DPC/SCP/Laboratory for the Reactivity of Surfaces and Interfaces, F-91191 Gif-sur-Yvette, France.
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Servaes K, Hennig C, Billard I, Gaillard C, Binnemans K, Görller-Walrand C, Van Deun R. Speciation of Uranyl Nitrato Complexes in Acetonitrile and in the Ionic Liquid 1-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700475] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Meitzner G, Gardea-Torresdey J, Parsons J, Scott S, Deguns E. The effect of cryogenic sample cooling on X-ray absorption spectra. Microchem J 2005. [DOI: 10.1016/j.microc.2005.01.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Vayssière P, Chaumont A, Wipff G. Cation extraction by 18-crown-6 to a room-temperature ionic liquid: The effect of solvent humidity investigated by molecular dynamics simulations. Phys Chem Chem Phys 2005. [DOI: 10.1039/b412794c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chaumont A, Wipff G. Solvation of Uranyl(II) and Europium(III) Cations and Their Chloro Complexes in a Room-Temperature Ionic Liquid. A Theoretical Study of the Effect of Solvent “Humidity”. Inorg Chem 2004; 43:5891-901. [PMID: 15360238 DOI: 10.1021/ic049386v] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a molecular dynamics study of the solvation of the UO2(2+) and Eu3+ cations and their chloro complexes in the [BMI][PF6][H2O] "humid" room-temperature ionic liquid (IL) composed of 1-butyl-3-methylimidazolium+ and PF6- ions and H2O in a 1:1:1 ratio. When compared to the results obtained in dry [BMI][PF6], the present results reveal the importance of water. The "naked" cations form UO2(H2O)5(2+) and Eu(H2O)9(3+) complexes, embedded in a shell of 7 and 8 PF6- anions, respectively. All studied UO2Cln(2-n) and EuCln(3-n) chloro complexes remain stable during the dynamics and coordinate additional H2O molecules in their first shell. UO2Cl4(2-) and EuCl6(3-) are surrounded by an "unsaturated" water shell, followed by a shell of BMI+ cations. According to an energy component analysis, the UO2Cl4(2-) and EuCl6(3-) species, intrinsically unstable toward dissociation, are more stable than their less halogenated analogues in the IL solution, due to the solvation forces. The different chloro species also interact better with the humid than with the dry IL, which hints at the importance of solvent humidity to improve their solubility. Humidity markedly modifies the local ion environment, with major consequences as far as their spectroscopic properties are concerned. We finally compare the aqueous interface of [BMI][PF6] and [OMI][PF6] ionic liquids, demonstrating the importance of imidazolium substituents (N-butyl versus N-octyl) to the nature of the interface and miscibility with water.
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Affiliation(s)
- Alain Chaumont
- Laboratoire MSM, UMR CNRS 7551, Institut de Chimie, 4 rue Blaise Pascal, 67 000 Strasbourg, France
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Bradley AE, Hardacre C, Nieuwenhuyzen M, Pitner WR, Sanders D, Seddon KR, Thied RC. A Structural and Electrochemical Investigation of 1-Alkyl-3-methylimidazolium Salts of the Nitratodioxouranate(VI) Anions [{UO2(NO3)2}2(μ4-C2O4)]2-, [UO2(NO3)3]-, and [UO2(NO3)4]2-. Inorg Chem 2004; 43:2503-14. [PMID: 15074968 DOI: 10.1021/ic035350b] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The properties of the 1-butyl-3-methylimidazolium salt of the dinuclear mu(4)-(O,O,O',O'-ethane-1,2-dioato)bis[bis(nitrato-O,O)dioxouranate(VI)] anion have been investigated using electrochemistry, single-crystal X-ray crystallography, and extended X-ray absorbance fine structure spectroscopy: the anion structures from these last two techniques are in excellent agreement with each other. Electrochemical reduction of the complex leads to the a two-electron metal-centered reduction of U(VI) to U(IV), and the production of UO(2), or a complex containing UO(2). Under normal conditions, this leads to the coating of the electrode with a passivating film. The presence of volatile organic compounds in the ionic liquids 1-alkyl-3-methylimidazolium nitrate (where the 1-alkyl chain was methyl, ethyl, propyl, butyl, pentyl, hexyl, dodecyl, hexadecyl, or octadecyl) during the oxidative dissolution of uranium(IV) oxide led to the formation of a yellow precipitate. To understand the effect of the cation upon the composition and structure of the precipitates, 1-alkyl-3-methylimidazolium salts of a number of nitratodioxouranate(VI) complexes were synthesized and then analyzed using X-ray crystallography. It was demonstrated that the length of the 1-alkyl chain played an important role, not only in the composition of the complex salt, but also in the synthesis of dinuclear anions containing the bridging mu(4)-(O,O,O',O'-ethane-1,2-dioato), or oxalato, ligand, by protecting it from further oxidation.
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Affiliation(s)
- Antonia E Bradley
- The QUILL Centre, The School of Chemistry, Queen's University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
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Chiarizia R, Jensen MP, Borkowski M, Ferraro JR, Thiyagarajan P, Littrell KC. Third Phase Formation Revisited: The U(VI), HNO3–TBP,n‐Dodecane System. SOLVENT EXTRACTION AND ION EXCHANGE 2003. [DOI: 10.1081/sei-120017545] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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