1
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Pu Z, Fu X, Qin J, Yang H, Shuai M, Li F. Spectroscopic and Theoretical Insights into H 2 Activation on Uranium Monoxide: Homolytic H 2 Cleavage Mediated by Intermediate OU(η 2-H 2). Inorg Chem 2024; 63:13304-13310. [PMID: 38986152 DOI: 10.1021/acs.inorgchem.4c01059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
Elucidating molecular-level interactions between dihydrogen (H2) and uranium oxides reveals fundamental insights into the intrinsic H2 activation mechanisms underlying processes such as heterogeneous catalysis over uranium oxides and corrosion of uranium induced by H2. Herein, the reactions of H2 with uranium monoxide (UO) molecules have been investigated via a combination of matrix-isolation infrared spectroscopy and quantum chemical calculations. A side-on bonded H2 complex, OU(η2-H2), is identified at 3733.7 and 800.3 cm-1. This species is regarded as a crucial intermediate along H2 activation pathways. Bonding analysis reveals cooperative U(π5f/6d) → H2(σ*) π// backdonation and U ← H2(σ) σ donation in OU(η2-H2) that facilitate the activation of the H2 moiety. Upon λ > 550 nm photoirradiation, OU(η2-H2) isomerizes into H2UO, indicating the homolytic H2 cleavage on UO. Mechanistic details of H2 adsorption and dissociation on UO molecules have been further elucidated.
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Affiliation(s)
- Zhen Pu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No.9-21, Huafengxincun, Jiangyou, Sichuan 621908, PR China
| | - Xiaoguo Fu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No.9-21, Huafengxincun, Jiangyou, Sichuan 621908, PR China
| | - Jianwei Qin
- Institute of Materials, China Academy of Engineering Physics, Mailbox No.9-21, Huafengxincun, Jiangyou, Sichuan 621908, PR China
| | - Hu Yang
- School of Materials and Chemistry, Southwest University of Science and Technology, 59 Middle Section of Qinglong Road, Mianyang 621010, PR China
| | - Maobing Shuai
- Institute of Materials, China Academy of Engineering Physics, Mailbox No.9-21, Huafengxincun, Jiangyou, Sichuan 621908, PR China
| | - Fang Li
- School of Materials and Chemistry, Southwest University of Science and Technology, 59 Middle Section of Qinglong Road, Mianyang 621010, PR China
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2
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Zheng H, Jiang S, Yan W, Wang T, Li S, Xie H, Li G, Yang X, Jiang L. Size-Specific Infrared Spectroscopic Study of the Reactions between Water Molecules and Neutral Vanadium Dimer: Evidence for Water Splitting. J Phys Chem Lett 2023; 14:3878-3883. [PMID: 37068164 DOI: 10.1021/acs.jpclett.3c00637] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Investigation of the reactions between water molecules and neutral metal clusters is important in water splitting but is very challenging due to the inherent difficulty of size selection. Here, we report a size-specific infrared-vacuum ultraviolet spectroscopic study on the reactions of water with neutral vanadium dimer. The V2O3H4 and V2O4H6 products were characterized to have unexpected V2(μ2-OH)(μ2-H)(η1-OH)2 and V2(μ2-OH)2(η1-H)2(η1-OH)2 structures, indicative of a water decomposition. A combination of theory and experiment reveals that the water splitting by V2 is both thermodynamically exothermic and kinetically facile in the gas phase. The present system serves as a model for clarifying the pivotal roles played by neutral metal clusters in water decomposition and also opens new avenues toward systematic understanding of water splitting by a large variety of single-cluster catalysts.
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Affiliation(s)
- Huijun Zheng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuai Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenhui Yan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tiantong Wang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shangdong Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hua Xie
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Gang Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Hefei National Laboratory, Hefei 230088, China
- Department of Chemistry and Shenzhen Key Laboratory of Energy Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ling Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Hefei National Laboratory, Hefei 230088, China
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3
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Jiang S, Zheng H, Yan W, Wang T, Wang C, Zhao Y, Xie H, Li G, Zheng X, Fan H, Jiang L. Spectroscopic identification of water splitting by neutral group 3 metals. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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4
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Li F, Qin J, Qiu R, Shuai M, Pu Z. Matrix-Isolation Infrared Spectra and Electronic Structure Calculations for Dinitrogen Complexes with Uranium Trioxide Molecules UO 3(η 1-NN) 1-4. Inorg Chem 2022; 61:11075-11083. [PMID: 35833920 DOI: 10.1021/acs.inorgchem.2c00799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigations of the interactions of uranium trioxide (UO3) with other species are expected to provide a new perspective on its reaction and bonding behaviors. Herein, we present a combined matrix-isolation infrared spectroscopy and theoretical study of the geometries, vibrational frequencies, electronic structures, and bonding patterns for a series of dinitrogen (N2) complexes with UO3 moieties UO3(η1-NN)1-4. The complexes are prepared by reactions of laser-ablated uranium atoms with O2/N2 mixtures or laser-ablated UO3 molecules with N2 in solid argon. UO3(η1-NN)1-4 are classified as "nonclassical" metal-N2 complexes with increased Δν(N2) values according to the experimental observations and the computed blue-shifts of N-N stretching frequencies and N-N bond length contractions. Electronic structure analysis suggests that UO3(η1-NN)1-4 are σ-only complexes with a total lack of π-back-donation. The energy decomposition analysis combined with natural orbitals for chemical valence calculations reveal that the bonding between the UO3 moiety and N2 ligands in UO3(η1-NN)1-4 arises from the roughly equal electrostatic attractions and orbital mixings. The inspection of orbital interactions from pairwise contributions indicates that the strongest orbital stabilization comes from the σ-donations of the 4σ*- and 5σ-based ligand molecular orbitals (MOs) into the hybrid 7s/6dx2-y2 MO of the U center. The electron polarization induced by electrostatic effects in the Ninner ← Nouter direction provides complementary contributions to the orbital stabilization in UO3(η1-NN)1-4. In addition, the reactions of UO3 with N2 ligands and the origination of the nonclassical behavior in UO3(η1-NN)1-4 are discussed.
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Affiliation(s)
- Fang Li
- School of Material Science and Engineering, Southwest University of Science and Technology, 59 Middle Section of Qinglong Road, Mianyang 621010, P. R. China
| | - Jianwei Qin
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China.,Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Ruizhi Qiu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China.,Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Maobing Shuai
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China
| | - Zhen Pu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China
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5
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Shan N, Wang Q, Xiao H, Wan L, Gao T. Ab Initio Molecular Dynamics Study, the Reaction Mechanism and Topological Properties of the Microscopic Interaction of PuO
2
and H
2
O. ChemistrySelect 2022. [DOI: 10.1002/slct.202104589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Na Shan
- Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China
| | - QingQing Wang
- The First Sub-Institute Nuclear Power Institute of China Chengdu 610005 China
| | - HuaGang Xiao
- Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China
| | - Lei Wan
- Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China
| | - Tao Gao
- Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China
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6
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Xiong Z, Chen X, Gong Y. Mass spectrometric and theoretical study on the formation of uranyl hydride from uranyl carboxylate. Phys Chem Chem Phys 2021; 23:20073-20079. [PMID: 34551043 DOI: 10.1039/d1cp03092b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uranyl hydride in the form of HUO2Cl2- was prepared upon collision-induced dissociation of (RCO2)UO2Cl2- (R = H, CH3CH2, CH3CH2CH2, CH3CHCH, (CH3)2CH, C5H9, C6H11 and C6H5CH2CH2) in the gas phase. It was found that uranyl hydrides result from alkene and alkyne elimination with concomitant β-hydride transfer of uranyl alkylides RUO2Cl2- following decarboxylation of the carboxylates with the exception of (HCO2)UO2Cl2-, and formation of HUVIO2Cl2- through alkene/alkyne loss is in competition with neutral ligand loss to give UVO2Cl2-. According to the calculations at the B3LYP level, loss of a neutral ligand is slightly less favorable in the cases of (CH3CH2)UO2Cl2- and (CH3CH2CH2)UO2Cl2-, and the situations of (CH3CHCH)UO2Cl2-, ((CH3)2CH)UO2Cl2-, (C5H9)UO2Cl2-, (C6H11)UO2Cl2- and (C6H5CH2CH2)UO2Cl2- with β-hydrogen atoms should be similar despite the fact that the yield of uranyl hydride depends on the nature of the ligand. Although no uranyl hydride was observed when β-hydrogen is not available in the carboxylate precursor, there is no HUO2Cl2- generated from (C6H5CO2)UO2Cl2-, (2-C6H4FCO2)UO2Cl2- and (CH2CHCH2CO2)UO2Cl2- with β-hydrogen either. This is attributed to the much more favorable formation of UO2Cl2- over HUO2Cl2- as revealed by the B3LYP calculations, which is similar to the absence of HUO2Cl2- in the (CH3CO2)UO2Cl2- case where highly reactive CH2 would be formed.
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Affiliation(s)
- Zhixin Xiong
- 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
| | - Xiuting Chen
- 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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Vı́cha J, Novotný J, Komorovsky S, Straka M, Kaupp M, Marek R. Relativistic Heavy-Neighbor-Atom Effects on NMR Shifts: Concepts and Trends Across the Periodic Table. Chem Rev 2020; 120:7065-7103. [DOI: 10.1021/acs.chemrev.9b00785] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jan Vı́cha
- Centre of Polymer Systems, Tomas Bata University in Zlı́n, tř. Tomáše Bati 5678, CZ-76001 Zlı́n, Czechia
| | - Jan Novotný
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
| | - Stanislav Komorovsky
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, CZ-16610 Prague, Czechia
| | - Martin Kaupp
- Institute of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Radek Marek
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
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8
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Wilkin OM, Harris N, Rooms JF, Dixon EL, Bridgeman AJ, Young NA. How Inert, Perturbing, or Interacting Are Cryogenic Matrices? A Combined Spectroscopic (Infrared, Electronic, and X-ray Absorption) and DFT Investigation of Matrix-Isolated Iron, Cobalt, Nickel, and Zinc Dibromides. J Phys Chem A 2018; 122:1994-2029. [DOI: 10.1021/acs.jpca.7b09734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Owen M. Wilkin
- Department
of Chemistry, The University of Hull, Kingston upon Hull HU6
7RX, U.K
| | - Neil Harris
- Department
of Chemistry, The University of Hull, Kingston upon Hull HU6
7RX, U.K
| | - John F. Rooms
- Department
of Chemistry, The University of Hull, Kingston upon Hull HU6
7RX, U.K
| | - Emma L. Dixon
- Department
of Chemistry, The University of Hull, Kingston upon Hull HU6
7RX, U.K
| | - Adam J. Bridgeman
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Nigel A. Young
- Department
of Chemistry, The University of Hull, Kingston upon Hull HU6
7RX, U.K
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9
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Niu W, Xie F, Li P, Ma J, Gao T, Yin H. Can water continuously oxidize the PuO molecule? Mechanisms, topological analysis and rate constant calculations. RSC Adv 2018. [DOI: 10.1039/c7ra12812f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A detailed description of the PuO continuously oxidized by water in the gas-phase.
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Affiliation(s)
- Wenxia Niu
- Department of Physics
- Taiyuan Normal University
- Taiyuan
- China
| | - Feng Xie
- Institute of Nuclear and New Energy Technology
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education
- Tsinghua University
- Beijing 100084
| | - Peng Li
- School of Physics and Electronic Engineering
- Shanxi University
- Taiyuan
- China
| | - Jie Ma
- School of Physics and Electronic Engineering
- Shanxi University
- Taiyuan
- China
| | - Tao Gao
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu
- China
| | - Huaqiang Yin
- Institute of Nuclear and New Energy Technology
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education
- Tsinghua University
- Beijing 100084
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10
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Andrews L, Cho HG, Thanthiriwatte KS, Dixon DA. Thorium and Uranium Hydride Phosphorus and Arsenic Bearing Molecules with Single and Double Actinide-Pnictogen and Bridged Agostic Hydrogen Bonds. Inorg Chem 2017; 56:2949-2957. [DOI: 10.1021/acs.inorgchem.6b03055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, United States
| | - Han-Gook Cho
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, United States
- Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 406-772, South Korea
| | - K. Sahan Thanthiriwatte
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0366, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0366, United States
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11
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First-Principles Study of Properties of Alpha Uranium Crystal and Seven Alpha Uranium Surfaces. J CHEM-NY 2017. [DOI: 10.1155/2017/8618340] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
First-principles calculation based on the GGA methods has been applied to the prediction of the properties of bulk α-uranium and seven α-uranium surfaces. The number of layers in the slab has great effects on the simulated surface properties. The predicted surface properties are trustworthy when the slab number is nine or more. The surface energies of the seven low index uranium surfaces are in the range from 1.756 to 2.151 J/m2. The hybrid between the 5f orbital and 6d orbital also has somewhat impacts on the surface energies of uranium.
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12
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Huang Z, Sun L, Yuan Y, Li Y, Wang X. Theoretical Insights into Halogenated Uranium Cyanide/Isocyanide Compounds. Inorg Chem 2016; 55:12559-12567. [PMID: 27989178 DOI: 10.1021/acs.inorgchem.6b01345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two kinds of halogenated uranium cyanide/isocyanide compounds, XUCN and XUNC (X = halogen) formed by the insertion of uranium atom into X-C(N) bonds of XCN (or XNC), were investigated by DFT and ab initio methods. Although XNC is less stable thermodynamically than XCN, XUNC is more stable than XUCN and is expected to be prepared and characterized in matrix isolation experiments. The C-N stretching vibration mode (νC-N) is the primary fingerprint for the identification of these isomers due to its red-shift character with respect to the relevant precursor. Atoms-in-molecule (AIM) analysis illustrates that both X-U and U-C(N) bonds in XUCN and XUNC show closed-shell interaction character, although partial covalent character contributes to them, and can be denoted as X-U2+(CN)- and X-U2+(NC)-, respectively. Charge decomposition analysis (CDA) further reveals that the isocyanide exhibits better donation performance than the cyanide, which should be the root cause of the difference between XUCN and XUNC.
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Affiliation(s)
- Zhengguo Huang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; College of Chemistry, Tianjin Normal University , Tianjin 300387, People's Republic of China
| | - Le Sun
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; College of Chemistry, Tianjin Normal University , Tianjin 300387, People's Republic of China
| | - Yuan Yuan
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; College of Chemistry, Tianjin Normal University , Tianjin 300387, People's Republic of China
| | - Yuying Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; College of Chemistry, Tianjin Normal University , Tianjin 300387, People's Republic of China
| | - Xiaohong Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry (Tianjin Normal University), Ministry of Education; College of Chemistry, Tianjin Normal University , Tianjin 300387, People's Republic of China
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13
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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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14
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15
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Reaction of Np atom with H2O in the gas phase: reaction mechanisms and ab initio molecular dynamics study. J Mol Model 2014; 20:2466. [DOI: 10.1007/s00894-014-2466-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 09/14/2014] [Indexed: 10/24/2022]
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16
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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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17
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Li P, Niu W, Gao T, Wang H. Water OH Bond Activation by Gas-Phase Plutonium Atoms: Reaction Mechanisms and Ab Initio Molecular Dynamics Study. Chemphyschem 2014; 15:3078-88. [DOI: 10.1002/cphc.201402327] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Indexed: 11/09/2022]
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18
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Li P, Niu W, Gao T. Investigation of the reactions of U, U+and U2+with ammonia: mechanisms and topological analysis. RSC Adv 2014. [DOI: 10.1039/c4ra03525a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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19
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Ivanova B, Spiteller M. Uranyl-water-containing complexes: solid-state UV-MALDI mass spectrometric and IR spectroscopic approach for selective quantitation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:1548-1563. [PMID: 23942998 DOI: 10.1007/s11356-013-1892-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 05/30/2013] [Indexed: 06/02/2023]
Abstract
Since primary environmental concept for long storage of nuclear waste involved assessment of water in uranium complexes depending on migration processes, the paper emphasized solid-state matrix-assisted laser desorption/ionization (MALDI) mass spectrometric (MS) and IR spectroscopic determination of UO2(NO3)2·6H2O; UO2(NO3)2·3H2O, α-, β-, and γ-UO3 modifications; UO3·xH2O (x = 1 or 2); UO3·H2O, described chemically as UO2(OH)2, β- and γ-UO2(OH)2 modifications; and UO4·2H2O, respectively. Advantages and limitation of vibrational spectroscopic approach are discussed, comparing optical spectroscopic data and crystallographic ones. Structural similarities occurred in α-γ modifications of UO3, and UO2(OH)2 compositions are analyzed. Selective speciation achieved by solid-state mass spectrometry is discussed both in terms of its analytical contribution for environmental quality assurance and assessment of radionuclides, and fundamental methodological interest related the mechanistic complex water exchange of UO3·H2O forms in the gas phase. In addition to high selectivity and precision, UV-MALDI-MS, employing an Orbitrap analyzer, was a method that provided fast steps that limited sample pretreatment techniques for direct analysis including imaging. Therefore, random and systematic errors altering metrology and originating from the sample pretreatment stages in the widely implemented analytical protocols for environmental sampling determination of actinides are significantly reduced involving the UV-MALDI-Orbitrap-MS method. The method of quantum chemistry is utilized as well to predict reliably the thermodynamics and nature of U-O bonds in uranium species in gas and condensed phases.
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Affiliation(s)
- Bojidarka Ivanova
- Lehrstuhl für Analytische Chemie, Institut für Umweltforschung, Fakultät für Chemie, Universität Dortmund, Otto-Hahn-Strasse 6, 44227, Dortmund, Nordrhein-Westfalen, Germany,
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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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21
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Li P, Niu W, Tian X, Gao T, Wang H. Ab initio molecular dynamics study of the reaction of U+ and U2+ with H2O in the gas phase: direct classical trajectory calculations. J Phys Chem A 2013; 117:3761-70. [PMID: 23631397 DOI: 10.1021/jp4006247] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The gas phase reactions of U(+) and U(2+) with H2O were investigated using an ab initio molecular dynamics method. All of the information along the minimum energy path were calculated with density functional theory (DFT) and coupled cluster methods. For U(+) with H2O, the molecular dynamics simulations yield a branching ratio of 86% for the H2 elimination channel to 14% for the H atomic elimination channel in agreement with the quadruple ion trap mass spectrometry (QIT/MS) experimental ratio of 91% to 9%. In the case of U(2+) + H2O, there is a crossing of the potential energy surfaces (PES) after the first transition state. Crossing seams between the PES and possible spin inversion processes were studied by means of the intrinsic reaction coordinate (IRC) approach. For U(2+) with H2O, all trajectories are corresponds to H atom elimination channel, this is consistent with the Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) experimental results. The chemical bonding evolution along the reaction pathways was discussed by using topological methodologies of the electron localization function (ELF).
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Affiliation(s)
- Peng Li
- Institute of Atomic and Molecular Physics, Sichuan University , Chengdu, 610065, China
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22
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Hrobárik P, Hrobáriková V, Greif AH, Kaupp M. Giant spin-orbit effects on NMR shifts in diamagnetic actinide complexes: guiding the search of uranium(VI) hydride complexes in the correct spectral range. Angew Chem Int Ed Engl 2012; 51:10884-8. [PMID: 23023873 DOI: 10.1002/anie.201204634] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 08/07/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Peter Hrobárik
- Technische Universität Berlin, Institut für Chemie, Theoretische Chemie, Sekr. C7, Strasse des 17. Juni 135, 10623 Berlin, Germany
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23
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Hrobárik P, Hrobáriková V, Greif AH, Kaupp M. Gigantische Spin-Bahn-Effekte auf NMR-Verschiebungen in diamagnetischen Actinoid-Komplexen: Richtlinien für die Suche nach Uran(VI)-Hydridkomplexen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204634] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Gong Y, Wang X, Andrews L, Schlöder T, Riedel S. Infrared Spectroscopic and Theoretical Investigations of the OUF2 and OThF2 Molecules with Triple Oxo Bond Character. Inorg Chem 2012; 51:6983-91. [DOI: 10.1021/ic3009128] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yu Gong
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904-4319, United States
| | - Xuefeng Wang
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904-4319, United States
- Department of Chemistry, Tongji University, Shanghai, P.R. China 200092
| | - Lester Andrews
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904-4319, United States
| | - Tobias Schlöder
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs Universität Freiburg, Albertstrasse
21, D-79104 Freiburg i. Br., Germany
| | - Sebastian Riedel
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs Universität Freiburg, Albertstrasse
21, D-79104 Freiburg i. Br., Germany
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25
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Gong Y, Andrews L. Matrix Infrared Spectroscopic and Theoretical Studies on the Reactions of Scandium, Yttrium, and Lanthanide Metal Atoms with Dimethyl Ether. J Phys Chem A 2011; 115:11624-31. [DOI: 10.1021/jp206239q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yu Gong
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Lester Andrews
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
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26
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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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27
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Zhou M, Zhuang J, Wang G, Chen M. Matrix Isolation Spectroscopic and Theoretical Study of Water Adsorption and Hydrolysis on Molecular Tantalum and Niobium Oxides. J Phys Chem A 2011; 115:2238-46. [DOI: 10.1021/jp200143y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mingfei Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China
| | - Jia Zhuang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China
| | - Guanjun Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China
| | - Mohua Chen
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China
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28
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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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29
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Gong Y, Zhou M. Water adsorption on platinum dioxide and dioxygen complex: matrix isolation infrared spectroscopic and theoretical study of three PtO(2)-H(2)O complexes. Chemphyschem 2010; 11:1888-94. [PMID: 20411524 DOI: 10.1002/cphc.201000104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The interactions of water molecule with platinum dioxygen complex and dioxide molecule are investigated by means of matrix isolation infrared spectroscopy and density functional calculations. The platinum atoms reacted with dioxygen to form the previously reported Pt(O(2)) complex. The Pt(O(2)) complex reacted with water molecule to give the Pt(O(2))-H(2)O complex, which was characterized to involve hydrogen bonding between one O atom of Pt(O(2)) and one H atom of H(2)O (structure A). Upon visible light irradiation, the hydrogen bonded Pt(O(2))HOH complex rearranged to another Pt(O(2))-H(2)O isomer (structure B), which involves (O(2))PtOH(2) interaction. The Pt(O(2))-H(2)O complex in structure B can be isomerized to the weakly bound platinum dioxide-water complex (structure C) under UV irradiation.
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Affiliation(s)
- Yu Gong
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433, PR China
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30
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Sun X, Samples C, Daia K, Meyers M, Bumgarner M. Behaviour of the uranyl (UO22+) ion in different strongly acidic media: Characterisation of UO22+ in common acids by electronic absorption spectroscopy. JOURNAL OF CHEMICAL RESEARCH 2009. [DOI: 10.3184/030823409x457546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The linear uranyl (UO22+) ion has been characterised by electronic absorption spectroscopy in the media of four highly concentrated acids: sulfuric, nitric, acetic, and hydrochloric acids. In sulfuric acid, the magnitude of splitting (cm1) of the vibronic peaks in the UO22+ spectra increased linearly as molar concentration of the acid increased from zero to 18 M. Such an unprecedented spectral progression has been attributed to the high concentrations of sulfuric acid reducing the extent of coordination of water molecules to the central uranium atom of UO22+. This is believed to reduce the electron density in the uranium valence shell and decrease the electrostatic repulsion between the uranium and oxygen valence shells, making the U=O bonds stronger. It results in the observed increase in splitting of the vibronic peaks. In nitric acid, a completely different spectral feature of uranyl was observed. First, as molar concentration of nitric acid increased, the vibronic structure in the UO22+ spectra disappeared gradually and the absorption band became continuous at 6 M. As the acid concentration further increased, vibronic lines were resolved in the lower-energy side of the spectra. The higher-energy side remained continuous with no vibronic structure observed. The convergence limit (cm1), the borderline between vibronic peaks in the lower-energy side and a continuous band in the higher-energy side, decreased linearly as the molarity of nitric acid increased from 8 M to 16 M. All this shows that nitric acid, with involvement of its conjugate nitrate anion, has made UO22+ dissociative beyond the convergence limit of its excited state. In acetic acid, as the molar concentration of the acid increased from zero to 17.5 M, the UO22+ spectra exhibited three-stages of progression due to a predominating coordination of a carboxyl group to UO22+ ([HOAc] = 0–9 M), dissociation of UO22+ at the convergence limit of its excited state ([HOAc] = 10–14 M), and formation of an undissociative excited state for UO22+ ([HOAc] = 15–17.5 M). In hydrochloric acid, UO22+ exhibited a comparable spectral feature to that observed in nitric and acetic acids due to a predominating coordination of the chloride anion to UO22+.
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Affiliation(s)
- Xiaoping Sun
- Department of Natural Science and Mathematics, University of Charleston, 2300 MacCorkle Avenue S. E., Charleston, West Virginia 25304, USA
| | - Clayton Samples
- Department of Natural Science and Mathematics, University of Charleston, 2300 MacCorkle Avenue S. E., Charleston, West Virginia 25304, USA
| | - Kristopher Daia
- Department of Natural Science and Mathematics, University of Charleston, 2300 MacCorkle Avenue S. E., Charleston, West Virginia 25304, USA
| | - Matthew Meyers
- Department of Natural Science and Mathematics, University of Charleston, 2300 MacCorkle Avenue S. E., Charleston, West Virginia 25304, USA
| | - Michael Bumgarner
- Department of Natural Science and Mathematics, University of Charleston, 2300 MacCorkle Avenue S. E., Charleston, West Virginia 25304, USA
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31
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Teng YL, Jiang L, Han S, Xu Q. Matrix-Isolation Infrared Spectroscopic and Density Functional Theory Studies on Reactions of Laser-Ablated Lead and Tin Atoms with Water Molecules. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.2149] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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32
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Xu J, Jin X, Zhou M. Reactions of Late Lanthanide Metal Atoms with Water Molecules: A Matrix Isolation Infrared Spectroscopic and Theoretical Study. J Phys Chem A 2007; 111:7105-11. [PMID: 17608463 DOI: 10.1021/jp073047g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of late lanthanide metal atoms (Gd-Lu) with water molecules have been investigated using matrix isolation infrared spectroscopy. The reaction intermediates and products were identified on the basis of isotopic substitution experiments and density functional theory calculations. All of the metal atoms except Lu react with water to form the M(H2O) complexes spontaneously upon annealing (M = Gd, Tb, Dy, Ho, Er, Tm, and Yb). The Dy(H2O) and Ho(H2O) complexes are able to coordinate a second water molecule to form the Dy(H2O)2 and Ho(H2O)2 complexes. The M(H2O) complexes isomerize to the inserted HMOH isomers under visible light irradiation, which further decompose to give the MO and/or HMO molecules upon UV light irradiation. The M(OH)2 molecules (M = Gd-Lu) were also produced. The results have been compared with our earlier work covering the early lanthanide metal atoms (Nd, Sm, Eu) to observe the existent trends for the lanthanide metal atom reactions.
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Affiliation(s)
- Jia Xu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433, People's Republic of China
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33
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Teng YL, Jiang L, Han S, Xu Q. Matrix-Isolation Infrared Spectroscopic and Theoretical Studies on Reactions of Laser-Ablated Germanium Atoms with Water Molecules. J Phys Chem A 2007; 111:6225-31. [PMID: 17580836 DOI: 10.1021/jp072138a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Laser-ablated germanium atoms have been codeposited at 4 K with water molecules in excess argon. Adduct and insertion products, such as Ge(H2O), HGeOH, HGeO, H2GeO, GeOH, Ge(OH)2, HGeOGeH, and HGeGeO, have been formed in the present experiments and characterized by using infrared spectroscopy on the basis of the results of the isotopic shifts, mixed isotopic splitting patterns, stepwise annealing, change of reagent concentration and laser energy, and comparison with theoretical predictions. Density functional theory calculations have been performed on these molecules and the corresponding transition states. The agreement between the experimental and calculated vibrational frequencies, relative absorption intensities, and isotopic shifts supports the identification of these molecules from the matrix infrared spectra. Plausible reaction mechanisms have been proposed to account for the formation of these molecules.
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Affiliation(s)
- Yun-Lei Teng
- National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
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34
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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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35
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Xu J, Zhou M. Reactions of Early Lanthanide Metal Atoms (Nd, Sm, Eu) with Water Molecules. A Matrix Isolation Infrared Spectroscopic and Theoretical Study. J Phys Chem A 2006; 110:10575-82. [PMID: 16956239 DOI: 10.1021/jp063776g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The reactions of early lanthanide metal atoms Nd, Sm, and Eu with water molecules have been investigated using matrix isolation infrared spectroscopy and density functional calculations. The reaction intermediates and products were identified on the basis of isotopic labeled experiments and density functional frequency calculations. The ground state metal atoms react with water to form the M(H2O) and M(H2O)(2) complexes spontaneously on annealing (M = Nd, Sm, Eu). The M(H2O) complexes isomerize to the inserted HMOH molecules under red light irradiation, which further decompose to give the metal monoxides upon UV light irradiation. The Nd(H2O)(2) complex decomposes to form the trivalent HNd(OH)(2) molecule, while the Sm(H2O)(2) and Eu(H2O)(2) complexes rearrange to the divalent Sm(OH)(2) and Eu(OH)(2) molecules under red light irradiation.
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Affiliation(s)
- Jia Xu
- Department of Chemistry and Laser Chemistry Institute, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
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36
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Wang X, Andrews L, Li J. Experimental and Theoretical Investigations of IR Spectra and Electronic Structures of the U(OH)2, UO2(OH), and UO2(OH)2 Molecules. Inorg Chem 2006; 45:4157-66. [PMID: 16676976 DOI: 10.1021/ic052071a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Reactions of laser-ablated U atoms and H2O2 molecules produce UO2, H2UO2, and UO2(OH)2 as major products and U(OH)2 and HU(O)OH as minor products. Complementary information is obtained from similar reactions of U atoms with D2O2, with H2 + O2 mixtures, and with H2O in excess Ar. Through extensive relativistic density functional theory calculations, we have determined the geometry structures and ground states of these U species with a variety of oxidation states U(II), U(IV), U(V), and U(VI). The calculated vibrational frequencies, IR intensities, and isotopic frequency ratios are in good agreement with the experimental values, thus supporting assignments of the observed matrix IR spectra. We propose that the reactions proceed by forming an energized [U(OH)4] intermediate from reactions of the excited U atom with two H2O2 molecules. Because of the special stability of the U(VI) oxidation state, this intermediate decomposes to the UO2(OH)2 molecule, which reveals a distinctive difference between the chemistries of U and Th, where the major product in analogous Th reactions is the tetrahedral Th(OH)4 molecule owing to the stable Th(IV) oxidation state.
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Affiliation(s)
- Xuefeng Wang
- Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904-4319, USA
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37
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Michelini MDC, Russo N, Sicilia E. How Can Uranium Ions (U+, U2+) Activate the OH Bond of Water in the Gas Phase? Angew Chem Int Ed Engl 2006; 45:1095-9. [PMID: 16389597 DOI: 10.1002/anie.200501931] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maria del Carmen Michelini
- Dipartimento di Chimica, Università della Calabria, Via P. Bucci, Cubo 14 C, 87030 Arcavacata di Rende, Italy, Fax
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38
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del Carmen Michelini M, Russo N, Sicilia E. How Can Uranium Ions (U+, U2+) Activate the OH Bond of Water in the Gas Phase? Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200501931] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Lyon JT, Andrews L. Formation and Characterization of the Uranium Methylidene Complexes CH2UHX (X = F, Cl, and Br). Inorg Chem 2006; 45:1847-52. [PMID: 16472002 DOI: 10.1021/ic051785i] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The reactions between uranium atoms and CH3X (X = F, Cl, and Br) molecules are investigated in a solid argon matrix. The major products formed on ultraviolet irradiation are the CH2=UHX methylidene complexes. DFT calculations predict these triplet ground-state structures to be stable and to have significant agostic interactions. Parallels between the uranium and analogous thorium methylidene complexes are discussed.
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Affiliation(s)
- Jonathan T Lyon
- Department of Chemistry, University of Virginia, Charlottesville, 22904-4319, USA
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