1
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Zhang X, Zhang Y, Zhou X, Xu J, Mi D. Evidence for the co-existence of isomers of water dimer radical cations and their inter-conversion in a linear ion trap. Heliyon 2023; 9:e17763. [PMID: 37456026 PMCID: PMC10338966 DOI: 10.1016/j.heliyon.2023.e17763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023] Open
Abstract
Water dimer radical cations are regarded as key intermediates in many aqueous reactions and biochemical processes. However, the structure of the water dimer radical cations, and particularly the inter-conversion between their isomers, remain difficult to investigate experimentally due to their short lifetime and low abundance under ambient conditions. Furthermore, the isomers cannot be distinguished in a full mass spectra. In this study, we report the experimental evidence for the hemi-bonded and proton-transferred isomers of gas-phase water dimer radical cations, and the inter-conversion process between them in a linear ion trap at low pressure and near room temperature. Multiple collisions of isolated water dimer radical cations with He inside the ion trap were systematically investigated; first, under different trapping times (i.e., reaction times) ranging from 0.03 to 800 ms, and then at a very low collision energies ranging from 0.1% to 10% normalized collision energy. The proton-transferred isomers were dominant at shorter trapping times (≤250 ms), while the hemi-bonded isomers were dominant at longer trapping times (250-800 ms). Moreover, the difference in symmetry of the shapes of the H2O•+ signal profiles and the H3O+ signal profiles implied the existence of two kinds of isomers and there were small potential differences between them. Our results also suggested that by tuning the experimental parameters the hemi-bonded isomers would become dominant, which could allow the study of novel chemical reactions involving the hemi-bonded two-center-three-electron (2c-3e) structure in a linear ion trap.
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2
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Structures, Binding and Clustering Energies of Cu2+(MeOH)n=1-8 Clusters and Temperature Effects : A DFT Study. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116343] [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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3
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Da-yang TE, Fifen JJ, Conradie J, Conradie MM. Structures, temperature effect, binding and clustering energies of Cu2+(MeOH)n=1-8 clusters and extrapolations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Abstract
The existence of a two-center, three-electron hemibond in the first solvation shell of •OH(aq) has long been a matter of debate. The hemibond manifests in ab initio molecular dynamics simulations as a small-r feature in the oxygen radial distribution function (RDF) for H2O···•OH, but that feature disappears when semilocal density functionals are replaced with hybrids, suggesting a self-interaction artifact. Using periodic simulations at the PBE0+D3 level, we demonstrate that the hemibond is actually still present (as evidenced by delocalization of the spin density) but is obscured by the hydrogen-bonded feature in the RDF due to a slight elongation of the hemibond. Computed electronic spectra for •OH(aq) are in excellent agreement with experiment and confirm that hemibond-like configurations play an outsized role in the spectroscopy due to an intense charge-transfer transition that is strongly attenuated in hydrogen-bonded configurations. Apparently, 25% exact exchange (as in PBE0) is insufficient to eliminate delocalization of unpaired spins.
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Affiliation(s)
- Bhaskar Rana
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - John M Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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5
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Liu JM, Nishigori T, Maeyama T, Huang QR, Katada M, Kuo JL, Fujii A. Infrared Spectroscopy and Anharmonic Vibrational Analysis of (H 2O-Kr n) + ( n = 1-3): Hemibond Formation of the Water Radical Cation. J Phys Chem Lett 2021; 12:7997-8002. [PMID: 34433278 DOI: 10.1021/acs.jpclett.1c02164] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The hemibond is a nonclassical covalent bond formed between a radical (cation) and a closed shell molecule. The hemibond formation ability of water has attracted great interest, concerning its role in ionization of water. While many computational studies on the water hemibond have been performed, clear experimental evidence has been hardly reported because the hydrogen bond formation overwhelms the hemibond formation. In the present study, infrared photodissociation spectroscopy is applied to (H2O-Krn)+ (n = 1-3) radical cation clusters. The observed spectra of (H2O-Krn)+ are well reproduced by the anharmonic vibrational simulations based on the hemibonded isomer structures. The firm evidence of the hemibond formation ability of water is revealed.
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Affiliation(s)
- Jing-Min Liu
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan
| | - Tomoki Nishigori
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba 6-3, Aoba-Ku, Sendai 980-8578, Japan
| | - Toshihiko Maeyama
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba 6-3, Aoba-Ku, Sendai 980-8578, Japan
| | - Qian-Rui Huang
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan
| | - Marusu Katada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba 6-3, Aoba-Ku, Sendai 980-8578, Japan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1 Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan
| | - Asuka Fujii
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba 6-3, Aoba-Ku, Sendai 980-8578, Japan
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6
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Mi D, Cui J, Kuang S, Dong X, Lu H. Facile Atmospheric Generation of Water Radical Cations via
TiO
2
‐Nanoneedle Arrays for Aromatic Hydrocarbon Detection Based on Corona Discharge. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dongbo Mi
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 China
| | - Jinhaojie Cui
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 China
| | - Siliang Kuang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry Jilin University Changchun 130012 China
| | - Xiaofeng Dong
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 China
| | - Haiyan Lu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry Jilin University Changchun 130012 China
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7
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Water Radical Cations in the Gas Phase: Methods and Mechanisms of Formation, Structure and Chemical Properties. Molecules 2020; 25:molecules25153490. [PMID: 32751962 PMCID: PMC7435662 DOI: 10.3390/molecules25153490] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 12/02/2022] Open
Abstract
Water radical cations, (H2O)n+•, are of great research interest in both fundamental and applied sciences. Fundamental studies of water radical reactions are important to better understand the mechanisms of natural processes, such as proton transfer in aqueous solutions, the formation of hydrogen bonds and DNA damage, as well as for the discovery of new gas-phase reactions and products. In applied science, the interest in water radicals is prompted by their potential in radiobiology and as a source of primary ions for selective and sensitive chemical ionization. However, in contrast to protonated water clusters, (H2O)nH+, which are relatively easy to generate and isolate in experiments, the generation and isolation of radical water clusters, (H2O)n+•, is tremendously difficult due to their ultra-high reactivity. This review focuses on the current knowledge and unknowns regarding (H2O)n+• species, including the methods and mechanisms of their formation, structure and chemical properties.
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8
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Niu Z, Tang M, Ge N. Structure, stability, infrared spectra, and bonding of OH m(H 2O) 7 ( m = 0, ±1) clusters: ab initio study combining the particle swarm optimization algorithm. Phys Chem Chem Phys 2020; 22:26487-26501. [PMID: 33185201 DOI: 10.1039/d0cp04332j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The various structural candidates of anionic, neutral, and cationic water clusters OHm(H2O)7 (m = 0, ±1) have been globally predicted by combining the particle swarm optimization method and quantum chemical calculations. Geometry optimization and vibrational analysis for the optimal structures were performed with the MP2/aug-cc-pVDZ method, and the energy profile was further refined at the CCSD(T)/CBS level. Special attention was paid to the relationships between configurations and energies, particularly the first solvation shell coordination number of OH- and OH. For OH-(H2O)7, OH(H2O)7, and OH+(H2O)7 clusters, the most stable species at room temperature are predicted to be the tetra-solvated multi-ring structure A6, the tri-solvated hemibond cage structure N1, and the single five-membered ring structure C2, respectively. The temperature effects on the stability of these three systems were also explored via Gibbs free energies. Furthermore, for the OH-(H2O)7 clusters, the assignments of vibrational transitions in the OH stretching region are in good agreement with the studies of small hydroxide ion-water clusters, and the IR spectra of two isomers (tetra-solvated multi-ring A6 and penta-solvated cage A3) may match future experimental observation well. By topological analysis and reduced density gradient analysis, the structural characteristics and bonding strengths of the studied clusters were investigated. This work indicates the excellent performance of the PSO search algorithm and CALYPSO on water clusters, and may further provide extensive insights into the chemical behavior such as the transport mechanism of OH- ions and OH radicals in the aqueous phase.
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Affiliation(s)
- Zhenwei Niu
- School of National Defense Science & Technology, Southwest University of Science and Technology, Mianyang 621010, P. R. China
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9
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Da-yang TE, Fifen JJ, Malloum A, Lahmar S, Nsangou M, Conradie J. Structures of the solvated copper(ii) ion in ammonia at various temperatures. NEW J CHEM 2020. [DOI: 10.1039/c9nj05169d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated theoretically the structures and relative stabilities of the solvated copper(ii) ion in ammonia, Cu2+(NH3)n, n = 1–10.
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Affiliation(s)
| | - Jean Jules Fifen
- Department of Physics
- Faculty of Science
- The University of Ngaoundere
- Ngaoundere
- Cameroon
| | - Alhadji Malloum
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
- Department of Physics
| | - Souad Lahmar
- Laboratoire de Spectroscopie Atomique Moléculaire et Applications
- Faculté des Sciences de Tunis
- Université de Tunis El Manar
- Tunis
- Tunisia
| | - Mama Nsangou
- University of Maroua
- Maroua
- Cameroon
- Department of Physics
- Faculty of Science
| | - Jeanet Conradie
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
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10
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Ab initio investigation of cationic water cluster (H2O)+13 via particle swarm optimization algorithm. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2464-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Wen YM, Wang ZQ, Hu CE, Chen XR, Chen QF. Possible low-energy isomers of OH (H2O)4 (n = 0, ±1) clusters via the particle swarm optimization algorithm: An ab initio study. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Zhao-Qi W, Hai-Yan W, Zeng ZY, Yan C. Ab initio investigation of possible lower-energy candidate structure for cationic water cluster (H2O) 12+ via particle swarm optimization method. Struct Chem 2019. [DOI: 10.1007/s11224-018-1182-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Ab initio investigation of the lower-energy candidate structures for (H2O)10+ water cluster. Struct Chem 2018. [DOI: 10.1007/s11224-018-1109-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Ab initio study of cationic water cluster (H 2 O) 9 + via particle swarm optimization algorithm. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Katada M, Hsu PJ, Fujii A, Kuo JL. Temperature and Size Dependence of Characteristic Hydrogen-Bonded Network Structures with Ion Core Switching in Protonated (Methanol)6–10–(Water)1 Mixed Clusters: A Revisit. J Phys Chem A 2017; 121:5399-5413. [DOI: 10.1021/acs.jpca.7b03762] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marusu Katada
- Department
of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Po-Jen Hsu
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Asuka Fujii
- Department
of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Jer-Lai Kuo
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
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16
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Ab initio investigation of possible candidate structures and properties of water cluster (H2O)7+ via particle swarm optimization method. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2016.11.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Hsu PJ, Ho KL, Lin SH, Kuo JL. Exploration of hydrogen bond networks and potential energy surfaces of methanol clusters using a two-stage clustering algorithm. Phys Chem Chem Phys 2017; 19:544-556. [DOI: 10.1039/c6cp07120a] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A two-stage algorithm based both on the similarity in shape and hydrogen bond network is developed to explore the potential energy surface of methanol clusters.
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Affiliation(s)
- Po-Jen Hsu
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
- Department of Applied Chemistry
| | - Kun-Lin Ho
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
| | - Sheng-Hsien Lin
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
- Department of Applied Chemistry
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
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18
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Herr JD, Steele RP. Signatures of Size-Dependent Structural Patterns in Hydrated Copper(I) Clusters, Cu +(H 2O) n=1-10. J Phys Chem A 2016; 120:10252-10263. [PMID: 27981838 DOI: 10.1021/acs.jpca.6b10346] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The isomers of a hydrated Cu(I) ion with n = 1-10 water molecules were investigated by using ab initio quantum chemistry and an automated isomer-search algorithm. The electronic structure and vibrational spectra of the hundreds of resulting isomers were used to analyze the source of the observed bonding patterns. A structural evolution from dominantly two-coordinate structures (n = 1-4) toward a mixture of two- and three-coordinate structures was observed at n = 5-6, where the stability provided by expanded hydrogen-bonding was competitive with the dominantly electrostatic interaction between the water ligand and remaining binding sites of the metal ion. Further hydration (n = 7-10) led to a mixture of three- and four-coordinate structures. The metal ion was found, through spectroscopic signatures, to appreciably perturb the O-H bonds of even third-shell water molecules, which highlighted the ability of this nominally simple ion to partially activate the surrounding water network.
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Affiliation(s)
- Jonathan D Herr
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States and.,Henry Eyring Center for Theoretical Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Ryan P Steele
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States and.,Henry Eyring Center for Theoretical Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
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19
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Tang M, Hu CE, Lv ZL, Chen XR, Cai LC. Ab Initio Study of Ionized Water Radical Cation (H 2O) 8+ in Combination with the Particle Swarm Optimization Method. J Phys Chem A 2016; 120:9489-9499. [PMID: 27934325 DOI: 10.1021/acs.jpca.6b09866] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The structures of cationic water clusters (H2O)8+ have been globally explored by the particle swarm optimization method in combination with quantum chemical calculations. Geometry optimization and vibrational analysis for the 15 most interesting clusters were computed at the MP2/aug-cc-pVDZ level and infrared spectrum calculation at MPW1K/6-311++G** level. Special attention was paid to the relationships between their configurations and energies. Both MP2 and B3LYP-D3 calculations revealed that the cage-like structure is the most stable, which is different from a five-membered ring lowest energy structure but agrees well with a cage-like structure in the literature. Furthermore, our obtained cage-like structure is more stable by 0.87 and 1.23 kcal/mol than the previously reported structures at MP2 and B3LYP-D3 levels, respectively. Interestingly, on the basis of their relative Gibbs free energies and the temperature dependence of populations, the cage-like structure predominates only at very low temperatures, and the most dominating species transforms into a newfound four-membered ring structure from 100 to 400 K, which can contribute greatly to the experimental infrared spectrum. By topological analysis and reduced density gradient analysis, we also investigated the structural characteristics and bonding strengths of these water cluster radical cations.
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Affiliation(s)
- Mei Tang
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University , Chengdu 610065, China
| | - Cui-E Hu
- College of Physics and Electronic Engineering, Chongqing Normal University , Chongqing 400047, China
| | - Zhen-Long Lv
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University , Chengdu 610065, China
| | - Xiang-Rong Chen
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University , Chengdu 610065, China
| | - Ling-Cang Cai
- National Key Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics , Mianyang 621900, China
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20
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Affiliation(s)
- Daniel M. Chipman
- Radiation Laboratory, University of Notre Dame, Notre
Dame, Indiana 46556-5674, United States
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21
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Liu L, Hu CE, Tang M, Chen XR, Cai LC. Ab initio investigation of structure, stability, thermal behavior, bonding, and infrared spectra of ionized water cluster (H 2O) 6. J Chem Phys 2016; 145:154307. [PMID: 27782468 DOI: 10.1063/1.4964860] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The low-lying isomers of cationic water cluster (H2O)6+ have been globally explored by using particle swarm optimization algorithm in conjunction with quantum chemical calculations. Compared with previous results, our searching method covers a wide range of structural isomers of (H2O)6+ and therefore turns out to be more effective. With these local minima, geometry optimization and vibrational analysis are performed for the most interesting clusters at second-order Møller-Plesset (MP2)/aug-cc-pVDZ level, and their energies are further refined at MP2/aug-cc-pVTZ and coupled-cluster theory with single, double, and perturbative triple excitations/aug-cc-pVDZ level. The interaction energies using the complete basis set limits at MP2 level are also reported. The relationships between their structure arrangement and their energies are discussed. Based on the results of thermal simulation, structural change from a four-numbered ring to a tree-like structure occurs at T ≈ 45 K, and the relative population of six lowest-free-energy isomers is found to exceed 4% at some point within the studied temperature range. Studies reveal that, among these six isomers, two new-found isomers constitute 10% of isomer population at 180 K, and the experimental spectra can be better explained with inclusions of the two isomers. The molecular orbitals for six representative cationic water clusters are also studied. Through topological and reduced density gradient analysis, we investigated the structural characteristics and the bonding strengths of these water cluster radical cations.
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Affiliation(s)
- Lei Liu
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
| | - Cui-E Hu
- College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China
| | - Mei Tang
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
| | - Xiang-Rong Chen
- Institute of Atomic and Molecular Physics, College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
| | - Ling-Cang Cai
- National Key Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China
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22
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Floris SD, Talbot JJ, Wilkinson MJ, Herr JD, Steele RP. Quantum molecular motion in the mixed ion-radical complex, [(H 2O)(H 2S)] . Phys Chem Chem Phys 2016; 18:27450-27459. [PMID: 27711703 DOI: 10.1039/c6cp05299a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The cation dimer of water and hydrogen sulfide, [(H2O)(H2S)]+, serves as a fundamental model for the oxidation chemistry of H2S. The known oxidative metabolism of H2S by biological species in sulfur-rich environments has motivated the study of the inherent properties of this benchmark complex, with possible mechanistic implications for modern water oxidation chemistry. The low-energy isomer of this open-shell ion is a proton-transferred (PT) structure, H3O+SH˙. An alternative PT structure, H3S+OH˙, and a hemibonded (HB) isomer, [H2O·SH2]+, are also stable isomers, placing this complex intermediate to known (H2O)2+ (PT) and (H2S)2+ (HB) limiting regimes. This intermediate character suggested the possibility of unique molecular motion, even in the vibrational ground state. Path integral molecular dynamics and anharmonic vibrational spectroscopy simulations have been performed in this study, in order to understand the inherent quantum molecular motion of this complex. The resulting structural distributions were found to deviate significantly from both classical and harmonic analyses, including the observation of large-amplitude anharmonic motion of the central proton and nearly free rotation of the terminal hydrogens. The predicted vibrational spectra are particularly unique and suggest characteristic signatures of the strong electronic interactions and anharmonic vibrational mode couplings in this radical cation.
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Affiliation(s)
- S D Floris
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, UT, USA.
| | - J J Talbot
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, UT, USA.
| | - M J Wilkinson
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, UT, USA.
| | - J D Herr
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, UT, USA.
| | - R P Steele
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, UT, USA.
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23
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Herr JD, Steele RP. Ion–Radical Pair Separation in Larger Oxidized Water Clusters, (H2O)+n=6–21. J Phys Chem A 2016; 120:7225-39. [DOI: 10.1021/acs.jpca.6b07465] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jonathan D. Herr
- Department
of Chemistry and Henry Eyring Center for
Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Ryan P. Steele
- Department
of Chemistry and Henry Eyring Center for
Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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24
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Talbot JJ, Cheng X, Herr JD, Steele RP. Vibrational Signatures of Electronic Properties in Oxidized Water: Unraveling the Anomalous Spectrum of the Water Dimer Cation. J Am Chem Soc 2016; 138:11936-45. [DOI: 10.1021/jacs.6b07182] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Justin J. Talbot
- Department
of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
- Henry
Eyring Center for Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Xiaolu Cheng
- Department
of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
- Henry
Eyring Center for Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Jonathan D. Herr
- Department
of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
- Henry
Eyring Center for Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Ryan P. Steele
- Department
of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
- Henry
Eyring Center for Theoretical Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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25
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Pan PR, Lu EP, Kuo JL, Tsai MK. The Spectroscopic Features of Ionized Water Medium: Theoretical Characterization and Implication Using (H 2O) n+, n=3-4, Cluster Model. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lin LC, Liang JM, Lu EP, Tsai MK. Response of the hydrogen bond network to the ionization of bulk water: ab initio molecular dynamic simulations using H2S(aq). Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.04.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
A proton transfer process is usually dominant in several biological phenomena such as the energy relaxation of photo-excited DNA base pairs and a charge relay process in Ser-His-Glu.
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Affiliation(s)
- Hiroto Tachikawa
- Division of Materials Chemistry
- Graduate School of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Tomoya Takada
- Department of Material Chemistry
- Asahikawa National College of Technology
- Asahikawa 071-8142
- Japan
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