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Zhang S, Gao F, Fang M, Liu B, Zhang B, Zhong Z, Yu L, Zhang Y, Tan X, Wang X. Catalyst-Free Extraction of U(VI) in Solution by Tribocatalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2404397. [PMID: 38946685 PMCID: PMC11434018 DOI: 10.1002/advs.202404397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/03/2024] [Indexed: 07/02/2024]
Abstract
Extraction of U(VI) in water is of great significance in energy and environmental fields. However, the traditional methods usually fail due to the indispensable extra addition of catalyst, adsorbent, precipitant, or sacrificial agents, which may lead to enhanced extraction costs and secondary pollution. Here, a new efficient uranium extraction strategy is proposed based on triboelectricity without adding a catalyst or other additives. It is found only under the friction between the microbubbles (generated under ultrasonication) and the water flow, that reactive oxygen species (ROS) can largely be generated, which thus contributes to the solidification of U(VI) from water. In addition, the magnetic field can affect the phase of the product. Under mechanical stirring, the product contains (UO2)O2·2H2O, while which contains UO2(OH)2 and (UO2)O2·4H2O under the magnetic stirring. Quenching experiments are also carried out to explore the influence of environmental factors. Most importantly, it shows great potential in the extraction of U(VI) from seawater. This work proposes a catalyst-free and light-free strategy toward the solidification of U(VI) from water, which avoids the secondary pollution of the catalyst to the environment and is low-cost, and has great potential in the real application.
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Affiliation(s)
- Shuo Zhang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Feixue Gao
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Ming Fang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Baoyi Liu
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Bin Zhang
- School of Materials Science and Engineering, Yan Shan University, Qinhuangdao, 066004, P. R. China
| | - Zijian Zhong
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Long Yu
- School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, P. R. China
| | - Yifeng Zhang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Xiaoli Tan
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Xiangke Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
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Patra K, Brennessel WW, Matson EM. Molecular Models of Atomically Dispersed Uranium at MoS 2 Surfaces Reveal Cooperative Mechanism of Water Reduction. J Am Chem Soc 2024; 146:20147-20157. [PMID: 38984489 PMCID: PMC11273346 DOI: 10.1021/jacs.4c05002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/26/2024] [Accepted: 06/26/2024] [Indexed: 07/11/2024]
Abstract
Single atoms of uranium supported on molybdenum sulfide surfaces (U@MoS2) have been recently demonstrated to facilitate the hydrogen evolution reaction (HER) through electrocatalysis. Theoretical calculations have predicted uranium hydroxide moieties bound to edge-sulfur atoms of MoS2 as a proposed transition state involved in the HER process. However, the isolation of relevant intermediates involved in this process remains a challenge, rendering mechanistic hypotheses unverified. The present work describes the isolation and characterization of a uranium-hydroxide intermediate on molybdenum sulfide surfaces using [(Cp*3Mo3S4)UCp*], a molecular model of a reduced uranium center supported at MoS2. Mechanistic investigations highlight the metalloligand cooperativity with uranium involved in the water activation pathway. The corresponding uranium-oxo analogue, [(Cp*3Mo3S4)Cp*U(═O)], was also accessed from the hydroxide cluster via hydrogen atom transfer and from [(Cp*3Mo3S4)UCp*] through an alternative direct oxygen atom transfer. These results provide an atomistic perspective on the reactivity of low-valent uranium at molybdenum sulfide surfaces toward water, modeling key intermediates associated with the HER of U@MoS2 catalysts.
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Affiliation(s)
- Kamaless Patra
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Ellen M. Matson
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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Vent-Schmidt T, Andrews L, Thanthiriwatte KS, Dixon DA, Riedel S. Reaction of Laser-Ablated Uranium and Thorium Atoms with H2Se: A Rare Example of Selenium Multiple Bonding. Inorg Chem 2015; 54:9761-9. [PMID: 26418218 DOI: 10.1021/acs.inorgchem.5b01383] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The compounds H2ThSe and H2USe were synthesized by the reaction of laser-ablated actinide metal atoms with H2Se under cryogenic conditions following the procedures used to synthesize H2AnX (An = Th, U; X = O, S). The molecules were characterized by infrared spectra in an argon matrix with the aid of deuterium substitution and electronic structure calculations at the density functional theory level. The main products, H2ThSe and H2USe, are shown to have a highly polarized actinide-selenium triple bond, as found for H2AnS on the basis of electronic structure calculations. There is an even larger back-bonding of the Se with the An than found for the corresponding sulfur compounds. These molecules are of special interest as rare examples of multiple bonding of selenium to a metal, particularly an actinide metal.
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Affiliation(s)
- Thomas Vent-Schmidt
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg , Albertstraße 21, D-79104 Freiburg i. Br., Germany
| | - Lester Andrews
- Department of Chemistry, University of Virginia , P.O. Box 400319, Charlottesville, Virginia 22904-4319, United States
| | - K Sahan Thanthiriwatte
- Department of Chemistry, The University of Alabama , Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama , Tuscaloosa, Alabama 35487-0336, United States
| | - Sebastian Riedel
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin , Fabeckstraße 34-36, D-14195 Berlin, Germany
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Şahin M, Özdemir N, Bal-Demirci T, Ülküseven B, Dinçer M, Soylu MS. Structural and spectroscopic characterization of a thiosemicarbazidatodioxouranium(VI) complex: a combined experimental and DFT study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:994-1001. [PMID: 25168237 DOI: 10.1016/j.saa.2014.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 06/12/2014] [Accepted: 08/04/2014] [Indexed: 06/03/2023]
Abstract
The title thiosemicarbazidatodioxouranium(VI) compound was synthesized and characterized by FT-IR, NMR and UV-vis spectroscopies. Solid-state structure of the compound was confirmed by X-ray crystallography. Besides, the molecular geometry, vibrational frequencies and gauge-independent atomic orbital (GIAO) (1)H and (13)C NMR chemical shift values of the compound in the ground state have been calculated using the density functional theory (DFT/B3LYP) method with the 6-311++G(d,p) basis set for the C, H, Cl, N, O, S atoms and SDD pseudo-potential for the U atom, and compared with the experimental data. Using the TD-DFT method, electronic absorption spectra of the compound have been predicted at same level. As a result, a good agreement is obtained between the experimental and theoretical ones.
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Affiliation(s)
- Musa Şahin
- Department of Chemistry, Engineering Faculty, İstanbul University, 34320 İstanbul, Turkey
| | - Namık Özdemir
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139 Samsun, Turkey.
| | - Tülay Bal-Demirci
- Department of Chemistry, Engineering Faculty, İstanbul University, 34320 İstanbul, Turkey
| | - Bahri Ülküseven
- Department of Chemistry, Engineering Faculty, İstanbul University, 34320 İstanbul, Turkey
| | - Muharrem Dinçer
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Mustafa Serkan Soylu
- Department of Physics, Faculty of Arts and Sciences, Giresun University, 28100 Giresun, Turkey
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Bodo E, Ciavardini A, Dalla Cort A, Giannicchi I, Yafteh Mihan F, Fornarini S, Vasile S, Scuderi D, Piccirillo S. Anion Recognition by Uranyl-Salophen Derivatives as Probed by Infrared Multiple Photon Dissociation Spectroscopy and Ab Initio Modeling. Chemistry 2014; 20:11783-92. [DOI: 10.1002/chem.201402788] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 06/02/2014] [Indexed: 11/11/2022]
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Odoh SO, Govind N, Schreckenbach G, de Jong WA. Cation–Cation Interactions in [(UO2)2(OH)n]4–n Complexes. Inorg Chem 2013; 52:11269-79. [DOI: 10.1021/ic4015338] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Samuel O. Odoh
- Environmental
Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Niranjan Govind
- Environmental
Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Georg Schreckenbach
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Wibe A. de Jong
- Environmental
Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Wang X, Andrews L, Thanthiriwatte KS, Dixon DA. Infrared Spectra of H2ThS and H2US in Noble Gas Matrixes: Enhanced H-An-S Covalent Bonding. Inorg Chem 2013; 52:10275-85. [DOI: 10.1021/ic400560k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuefeng Wang
- Department
of Chemistry, Tongji University, Shanghai 200092, China
- Department
of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, United States
| | - Lester Andrews
- Department
of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, United States
| | - K. Sahan Thanthiriwatte
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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8
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Gong Y, Andrews L. Matrix Infrared Spectroscopic and Theoretical Investigations of Uranium Atom and Methanol Reaction Products. Inorg Chem 2011; 50:7099-105. [DOI: 10.1021/ic200618x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Gong Y, Andrews L. Matrix infrared spectroscopic and density functional theoretical investigations on thorium and uranium atom reactions with dimethyl ether. Dalton Trans 2011; 40:11106-14. [DOI: 10.1039/c1dt10725a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Oncák M, Schröder D, Slavícek P. Theoretical study of the microhydration of mononuclear and dinuclear uranium(VI) species derived from solvolysis of uranyl nitrate in water. J Comput Chem 2010; 31:2294-306. [PMID: 20340110 DOI: 10.1002/jcc.21521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The structures and energetics of mononuclear and dinuclear uranium species formed upon speciation of uranyl(VI) nitrate, UO(2)(NO(3))(2), in water are investigated by quantum chemistry using density functional theory and the wavefunction-based methods (MP2, CCSD, CCSD(T)). We provide a discussion of the basic coordination patterns of the various mono- and dinuclear uranyl compounds [(UO(2))(m)(X,Y)(2m-1)(H2O)(n)](+) (m = 1, 2; n = 0-4) found in a recent mass spectrometric study (Tsierkezos et al., Inorg Chem 2009, 48, 6287). The energetics of the complexation of the uranyl dication to the counterions OH(-) and NO(3) (-) as well as the degradation of the dinuclear species were studied by reference to a test set of 16 representative molecules with the MP2 method and the B3LYP, M06, M06-HF, and M06-2X DFT functionals. All DFT functionals provide structures and energetics close to MP2 results, with M06 family being slightly superior to the standard B3LYP functional.
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Affiliation(s)
- Milan Oncák
- Department of Physical Chemistry, Institute of Chemical Technology Prague, Czech Republic
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Michelini MDC, Marçalo J, Russo N, Gibson JK. Gas-Phase Reactions of Uranate Ions, UO2−, UO3−, UO4−, and UO4H−, with Methanol: a Convergence of Experiment and Theory. Inorg Chem 2010; 49:3836-50. [DOI: 10.1021/ic902550g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Maria del Carmen Michelini
- Dipartimento di Chimica, Università della Calabria, Via P. Bucci, Cubo 14 C, 87030 Arcavacata di Rende, Italy
| | - Joaquim Marçalo
- Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal
| | - Nino Russo
- Dipartimento di Chimica, Università della Calabria, Via P. Bucci, Cubo 14 C, 87030 Arcavacata di Rende, Italy
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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12
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Páez-Hernández D, Ramírez-Tagle R, Codorniu-Hernández E, Montero-Cabrera LA, Arratia-Pérez R. Quantum relativistic investigation about the coordination and bonding effects of different ligands on uranyl complexes. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.11.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Cao Z, Balasubramanian K. Theoretical studies of UO2(OH)(H2O)n+, UO2(OH)2(H2O)n, NpO2(OH)(H2O)n, and PuO2(OH)(H2O)n+ (n≤21) complexes in aqueous solution. J Chem Phys 2009; 131:164504. [DOI: 10.1063/1.3244041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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14
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Tsipis AC, Kefalidis CE, Tsipis CA. The Role of the 5f Orbitals in Bonding, Aromaticity, and Reactivity of Planar Isocyclic and Heterocyclic Uranium Clusters. J Am Chem Soc 2008; 130:9144-55. [DOI: 10.1021/ja802344z] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Athanassios C. Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece, and Laboratory of Applied Quantum Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Christos E. Kefalidis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece, and Laboratory of Applied Quantum Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Constantinos A. Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece, and Laboratory of Applied Quantum Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
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Bryantsev VS, Jong WAD, Cossel KC, Diallo MS, Goddard WA, Groenewold GS, Chien W, Van Stipdonk MJ. Two-Electron Three-Centered Bond in Side-On (η2) Uranyl(V) Superoxo Complexes. J Phys Chem A 2008; 112:5777-80. [DOI: 10.1021/jp804202q] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Vyacheslav S. Bryantsev
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Wibe A. de Jong
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Kevin C. Cossel
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Mamadou S. Diallo
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - William A. Goddard
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Gary S. Groenewold
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Winnie Chien
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
| | - Michael J. Van Stipdonk
- Materials and Process Simulation Centre, Beckman Institute 139-74, California Institute of Technology, Pasadena, California 91125, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemical Sciences, Idaho National Laboratory, 2525 North Fremont Avenue, Idaho Falls, Idaho 83415, and Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260
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Hennig C, Servaes K, Nockemann P, Van Hecke K, Van Meervelt L, Wouters J, Fluyt L, Görller-Walrand C, Van Deun R. Species Distribution and Coordination of Uranyl Chloro Complexes in Acetonitrile. Inorg Chem 2008. [DOI: 10.1021/ic7014435] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Christoph Hennig
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Kelly Servaes
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Peter Nockemann
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Kristof Van Hecke
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Luc Van Meervelt
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Johan Wouters
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Linda Fluyt
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Christiane Görller-Walrand
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
| | - Rik Van Deun
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium, and Laboratoire de Chimie Biologique Structurale, FUNDP - Fac. des Sciences, 61 Rue de Bruxelles, B-5000 Namur, Belgium
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17
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Lyon JT, Andrews L, Malmqvist PA, Roos BO, Yang T, Bursten BE. Infrared Spectrum and Bonding in Uranium Methylidene Dihydride, CH2UH2. Inorg Chem 2007; 46:4917-25. [PMID: 17487964 DOI: 10.1021/ic062407w] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Uranium atoms activate methane upon ultraviolet excitation to form the methyl uranium hydride CH3-UH, which undergoes alpha-H transfer to produce uranium methylidene dihydride, CH2=UH2. This rearrangement most likely occurs on an excited-quintet potential-energy surface and is followed by relaxation in the argon matrix. These simple U+CH4 reaction products are identified through isotopic substitution (13CH4, CD4, CH2D2) and density functional theory frequency and structure calculations for the strong U-H stretching modes. Relativistic multiconfiguration (CASSCF/CASPT2) calculations substantiate the agostic distorted C1 ground-state structure for the triplet CH2=UH2 molecule. We find that uranium atoms are less reactive in methane activation than thorium atoms. Our calculations show that the CH2=UH2 complex is distorted more than CH2=ThH2. A favorable interaction between the low energy open-shell U(5f) sigma orbital and the agostic hydrogen contributes to the distortion in the uranium methylidene complexes.
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Affiliation(s)
- Jonathan T Lyon
- Department of Chemistry, P.O. Box 400319, Charlottesville, Virginia 22904-4319, USA
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Wang X, Andrews L. Contrasting Products in the Reactions of Cr, Mo, and W Atoms with H2O2: Argon Matrix Infrared Spectra and Theoretical Calculations. J Phys Chem A 2006; 110:10409-18. [PMID: 16942046 DOI: 10.1021/jp063024m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Products in the reactions of H2O2 and H2, O2 mixtures have been observed by matrix infrared absorptions and identified through comparisons with vibrational frequencies calculated for these molecules. The chromium reactions are dominated by lower oxidation state products, whereas molybdenum and tungsten chemistry favors higher oxidation state products. For example chromium dihydroxide, Cr(OH)2, molybdenum hydride oxide, H2MoO2, and tungsten hydride oxide, H2WO2, were observed in laser-ablated metal atom reactions with H2O2, and calculations show that these are the most stable molecules for this stoichiometry. Chromium monohydroxide, CrOH, was identified through O-H and Cr-O stretching modes, while HWO was observed by W-H and W=O stretching modes. The metal oxyhydroxides, HMO(OH), were observed for all metals. However, reactions with two H2O2 molecules give OCr(OH)2, MoO2(OH)2, and WO2(OH)2. The relative stabilities of different structures for Cr, Mo, and W are due to different participations of occupied d orbitals. The reactivity of the cold metal atoms with H2O2 on annealing the solid argon matrix increases on going down the group.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, P O Box 400319, Charlottesville, Virginia 22904-4319, USA
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