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Ahmadi S. Hydrated electrons and cluster science. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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2
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Mirdha RH, Naskar P, Chaudhury P. Structural transformation in $$(\hbox {MgO})_{{{n}}}$$ clusters using a gradient-only strategy and its comparison with a full Hessian-based calculation. INDIAN JOURNAL OF PHYSICS 2021; 95:561-570. [DOI: 10.1007/s12648-020-01724-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 11/25/2019] [Indexed: 07/19/2023]
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3
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Voora VK, Kairalapova A, Sommerfeld T, Jordan KD. Theoretical approaches for treating non-valence correlation-bound anions. J Chem Phys 2017; 147:214114. [DOI: 10.1063/1.4991497] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Vamsee K. Voora
- Department of Chemistry, University of California, Irvine, California 92697, USA
| | - Arailym Kairalapova
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Thomas Sommerfeld
- Department of Chemistry and Physics, Southeastern Louisiana University, Hammond, Louisiana 70402, USA
| | - Kenneth D. Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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4
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Herbert JM. The Quantum Chemistry of Loosely-Bound Electrons. REVIEWS IN COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1002/9781118889886.ch8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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5
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Shin BK, Choi TH. Investigation of potential energy landscapes of (H2O)7− and (H2O)8− clusters. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.02.045] [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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6
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GUHA SATYAJIT, NEOGI SOUMYAGANGULY, CHAUDHURY PINAKI. Study of structure and spectroscopy of water–hydroxide ion clusters: A combined simulated annealing and DFT-based approach. J CHEM SCI 2014. [DOI: 10.1007/s12039-014-0613-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Turi L, Rossky PJ. Theoretical studies of spectroscopy and dynamics of hydrated electrons. Chem Rev 2012; 112:5641-74. [PMID: 22954423 DOI: 10.1021/cr300144z] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- László Turi
- Department of Physical Chemistry, Eötvös Loránd University, Budapest, Hungary.
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8
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Vysotskiy VP, Cederbaum LS, Sommerfeld T, Voora VK, Jordan KD. Benchmark Calculations of the Energies for Binding Excess Electrons to Water Clusters. J Chem Theory Comput 2012; 8:893-900. [DOI: 10.1021/ct200925x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Victor P. Vysotskiy
- Theoretische
Chemie, Institut
für Physikalische Chemie, Universität Heidelberg, D-69120
Heidelberg, Germany
| | - Lorenz S. Cederbaum
- Theoretische
Chemie, Institut
für Physikalische Chemie, Universität Heidelberg, D-69120
Heidelberg, Germany
| | - Thomas Sommerfeld
- Department
of Chemistry and
Physics, Southeastern Louisiana University, Hammond, Louisiana 70402,
United States
| | - Vamsee K. Voora
- Department
of Chemistry and Center
for Molecular and Materials Simulations, University of Pittsburgh,
Pittsburgh, Pennsylvania 15260, United States
| | - Kenneth D. Jordan
- Department
of Chemistry and Center
for Molecular and Materials Simulations, University of Pittsburgh,
Pittsburgh, Pennsylvania 15260, United States
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9
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Pratihar S, Chandra A. A first principles molecular dynamics study of excess electron and lithium atom solvation in water-ammonia mixed clusters: structural, spectral, and dynamical behaviors of [(H2O)5NH3]- and Li(H2O)5NH3 at finite temperature. J Chem Phys 2011; 134:034302. [PMID: 21261348 DOI: 10.1063/1.3511701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
First principles molecular dynamics simulations are carried out to investigate the solvation of an excess electron and a lithium atom in mixed water-ammonia cluster (H(2)O)(5)NH(3) at a finite temperature of 150 K. Both [(H(2)O)(5)NH(3)](-) and Li(H(2)O)(5)NH(3) clusters are seen to display substantial hydrogen bond dynamics due to thermal motion leading to many different isomeric structures. Also, the structures of these two clusters are found to be very different from each other and also very different from the corresponding neutral cluster without any excess electron or the metal atom. Spontaneous ionization of Li atom occurs in the case of Li(H(2)O)(5)NH(3). The spatial distribution of the singly occupied molecular orbital shows where and how the excess (or free) electron is primarily localized in these clusters. The populations of single acceptor (A), double acceptor (AA), and free (NIL) type water and ammonia molecules are found to be significantly high. The dangling hydrogens of these type of water or ammonia molecules are found to primarily capture the free electron. It is also found that the free electron binding motifs evolve with time due to thermal fluctuations and the vertical detachment energy of [(H(2)O)(5)NH(3)](-) and vertical ionization energy of Li(H(2)O)(5)NH(3) also change with time along the simulation trajectories. Assignments of the observed peaks in the vibrational power spectra are done and we found a one to one correlation between the time-averaged populations of water and ammonia molecules at different H-bonding sites with the various peaks of power spectra. The frequency-time correlation functions of OH stretch vibrational frequencies of these clusters are also calculated and their decay profiles are analyzed in terms of the dynamics of hydrogen bonded and dangling OH modes. It is found that the hydrogen bond lifetimes in these clusters are almost five to six times longer than that of pure liquid water at room temperature.
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Affiliation(s)
- Subha Pratihar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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10
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Pratihar S, Chandra A. Excess electron and lithium atom solvation in water clusters at finite temperature: an ab initio molecular dynamics study of the structural, spectral, and dynamical behavior of (H2O)6- and Li(H2O)6. J Phys Chem A 2010; 114:11869-78. [PMID: 20958010 DOI: 10.1021/jp103139c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The roles of hydrogen bonds in the solvation of an excess electron and a lithium atom in water hexamer cluster at 150 K have been studied by means of ab initio molecular dynamics simulations. It is found that the hydrogen bonded structures of (H(2)O)(6)(-) and Li(H(2)O)(6) clusters are very different from each other and they dynamically evolve from one conformer to other along their simulation trajectories. The populations of the single acceptor, double acceptor, and free type water molecules are found to be significantly high unlike that in pure water clusters. Free hydrogens of these type of water molecules primarily capture the unbound electron density in these clusters. It is found that the binding motifs of the free electron evolve with time and the vertical detachment energy of (H(2)O)(6)(-) and vertical ionization energy of Li(H(2)O)(6) also change with time. Assignments of the observed peaks in vibrational power spectra are done, and we found direct correlations between the time-averaged population of water molecules in different hydrogen bonding states and the spectral features. The dynamical aspects of these clusters have also been studied through calculations of time correlations of instantaneous stretch frequencies of OH modes which are obtained from the simulation trajectories through a time series analysis.
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Affiliation(s)
- Subha Pratihar
- Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016
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11
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Jacobson LD, Herbert JM. A one-electron model for the aqueous electron that includes many-body electron-water polarization: Bulk equilibrium structure, vertical electron binding energy, and optical absorption spectrum. J Chem Phys 2010; 133:154506. [DOI: 10.1063/1.3490479] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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12
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Choi TH, Sommerfeld T, Yilmaz SL, Jordan KD. Discrete Variable Representation Implementation of the One-Electron Polarization Model. J Chem Theory Comput 2010; 6:2388-94. [DOI: 10.1021/ct100263r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tae Hoon Choi
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, Southeastern Louisiana University, Hammond, Louisiana 70402, and Center for Simulation and Modeling, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Thomas Sommerfeld
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, Southeastern Louisiana University, Hammond, Louisiana 70402, and Center for Simulation and Modeling, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - S Levent Yilmaz
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, Southeastern Louisiana University, Hammond, Louisiana 70402, and Center for Simulation and Modeling, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Kenneth D Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, Southeastern Louisiana University, Hammond, Louisiana 70402, and Center for Simulation and Modeling, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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13
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Madarász Á, Rossky PJ, Turi L. Response of Observables for Cold Anionic Water Clusters to Cluster Thermal History. J Phys Chem A 2010; 114:2331-7. [DOI: 10.1021/jp908876f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ádám Madarász
- Eötvös Loránd University, Department of Physical Chemistry, Budapest 112, P.O. Box 32, H-1518 Hungary, and Department of Chemistry and Biochemistry and Institute for Computational Engineering and Sciences, 1 University Station A5300, University of Texas at Austin, Austin, Texas 78712-1167
| | - Peter J. Rossky
- Eötvös Loránd University, Department of Physical Chemistry, Budapest 112, P.O. Box 32, H-1518 Hungary, and Department of Chemistry and Biochemistry and Institute for Computational Engineering and Sciences, 1 University Station A5300, University of Texas at Austin, Austin, Texas 78712-1167
| | - László Turi
- Eötvös Loránd University, Department of Physical Chemistry, Budapest 112, P.O. Box 32, H-1518 Hungary, and Department of Chemistry and Biochemistry and Institute for Computational Engineering and Sciences, 1 University Station A5300, University of Texas at Austin, Austin, Texas 78712-1167
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14
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Asare E, Musah AR, Curotto E, Freeman DL, Doll JD. The thermodynamic and ground state properties of the TIP4P water octamer. J Chem Phys 2009; 131:184508. [DOI: 10.1063/1.3259047] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Takayanagi T, Yoshikawa T, Motegi H, Shiga M. Path-integral molecular dynamics simulations for water anion clusters (H2O)5- and (D2O)5-. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.107] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Lubombo C, Curotto E, Janeiro Barral PE, Mella M. Thermodynamic properties of ammonia clusters (NH3)n n=2–11: Comparing classical and quantum simulation results for hydrogen bonded species. J Chem Phys 2009; 131:034312. [DOI: 10.1063/1.3159398] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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18
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Analytical gradient for geometry optimizations of (H2O)n- clusters as described by the PM1 polarizable model. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Yagi K, Okano Y, Sato T, Kawashima Y, Tsuneda T, Hirao K. Water Cluster Anions Studied by the Long-Range Corrected Density Functional Theory. J Phys Chem A 2008; 112:9845-53. [DOI: 10.1021/jp802927d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kiyoshi Yagi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
| | - Yuko Okano
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
| | - Takeshi Sato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
| | - Yukio Kawashima
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
| | - Takao Tsuneda
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
| | - Kimihiko Hirao
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan, CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan, and Department of Research Superstar Program, Organization for the Promotion of Advanced Research, Kyushu University, Fukuoka 812-8581, Japan
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20
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Pratihar S, Chandra A. Microscopic solvation of a lithium atom in water-ammonia mixed clusters: Solvent coordination and electron localization in presence of a counterion. J Chem Phys 2008; 129:024511. [DOI: 10.1063/1.2951989] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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21
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Williams CF, Herbert JM. Influence of Structure on Electron Correlation Effects and Electron−Water Dispersion Interactions in Anionic Water Clusters. J Phys Chem A 2008; 112:6171-8. [DOI: 10.1021/jp802272r] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - John M. Herbert
- Department of Chemistry, The Ohio State University, Columbus, Ohio 43210
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22
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23
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Abstract
It is has been established that the excess electrons in small (i.e., n < or = 7) (H2O)n- clusters are bound in the dipole field of the neutral cluster and, thus, exist as surface states. However, the motifs for the binding of an excess electron to larger water clusters remain the subject of considerable debate. The prevailing view is that electrostatic interactions with the "free" OH bonds of the cluster dominate the binding of the excess electron in both small and large clusters. In the present study, a quantum Drude model is used to study selected (H2O)n- clusters in the n = 12-24 size range with the goal of elucidating different possible binding motifs. In addition to the known surface and cavity states, we identify a new binding motif, where the excess electron permeates the hydrogen-bonding network. It is found that electrostatic interactions dominate the binding of the excess electron only for isomers with large dipole moments, whereas in isomers without large dipole moments polarization and correlation effects dominate. Remarkably, for the network-permeating states, the excess electron binds even in the absence of electrostatic interactions.
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Affiliation(s)
- Thomas Sommerfeld
- University of Pittsburgh, Department of Chemistry and Center for Molecular and Materials Simulations, Chevron Science Center, 219 Parkman Ave., Pittsburgh, Pennsylvania 15260, USA
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24
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Pratihar S, Chandra A. Electron solvation in water-ammonia mixed clusters: Structure, energetics, and the nature of localization states of the excess electron. J Chem Phys 2007; 126:234510. [PMID: 17600428 DOI: 10.1063/1.2741257] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The structure and energetics of water-ammonia mixed clusters with an excess electron, [(H2O)n(NH3)m]- with m=1, n=2-6 and m=2, n=2, and also the corresponding neutral clusters are investigated in detail by means of ab initio quantum chemical calculations. The authors focus on the localization structure of the excess electron with respect to its surface versus interiorlike states, its binding to ammonia versus water molecules, the spatial and orientational arrangement of solvent molecules around the excess electron, the changes of the overall hydrogen-bonded structure of the clusters as compared to those of the neutral ones and associated dipole moment changes, vertical detachment energies of the anionic clusters, and also the vertical attachment energies of the neutral clusters. It is found that the hydrogen-bonded structure of the anionic clusters are very different from those of the neutral clusters unlike the case of water-ammonia dimer anion, and these changes in structural arrangements lead to drastically different dipole moments of the anionic and the neutral clusters. The spatial distribution of the singly occupied molecular orbital holding the excess electron shows only surface states for the smaller clusters. However, for n=5 and 6, both surface and interiorlike binding states are found to exist for the excess electron. For the surface states, the excess electron can be bound to the dangling hydrogens of either an ammonia or a water molecule with different degrees of stability and vertical detachment energies. The interiorlike states, wherever they exist, are found to have a higher vertical detachment energy than any of the surface states of the same cluster. Also, for interiorlike states, the ammonia molecule with its dangling hydrogens is always found to stay on top or on a far side of the charge density of the excess electron without participating in the hydrogen bond network of the cluster; the intermolecular hydrogen bonds are formed by the water molecules only which add to the overall stability of these anionic clusters.
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Affiliation(s)
- Subha Pratihar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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25
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Sommerfeld T, Gardner SD, DeFusco A, Jordan KD. Low-lying isomers and finite temperature behavior of (H2O)6−. J Chem Phys 2006; 125:174301. [PMID: 17100433 DOI: 10.1063/1.2358984] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
(H2O)(6) (-) appears as a "magic" number water cluster in (H2O)(n) (-) mass spectra. The structure of the (H2O)(6) (-) isomer dominating the experimental population has been established only recently [N. I. Hammer et al., J. Phys. Chem. A 109, 7896 (2005)], and the most noteworthy characteristic of this isomer is the localization of the excess electron in the vicinity of a double-acceptor monomer. In the present work, we use a quantum Drude model to characterize the low-energy isomers and the finite temperature properties of (H2O)(6) (-). Comparison with ab initio calculations shows that the use of a water model employing distributed polarizabilities and distributed repulsive sites is necessary to correctly reproduce the energy ordering of the low-lying isomers. Both the simulations and the ab initio calculations predict that there are several isomers of (H2O)(6) (-) significantly lower in energy than the experimentally observed species, suggesting that the experimental distribution is far from equilibrium.
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Affiliation(s)
- Thomas Sommerfeld
- Department of Chemistry and Center for Molecular and Materials Simulation, University of Pittsburgh, Chevron Science Center, Pittsburgh, PA 15260, USA.
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26
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Turi L, Madarász A, Rossky PJ. Excess electron localization sites in neutral water clusters. J Chem Phys 2006; 125:014308. [PMID: 16863299 DOI: 10.1063/1.2213965] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
We present approximate pseudopotential quantum-mechanical calculations of the excess electron states of equilibrated neutral water clusters sampled by classical molecular dynamics simulations. The internal energy of the clusters are representative of those present at temperatures of 200 and 300 K. Correlated electronic structure calculations are used to validate the pseudopotential for this purpose. We find that the neutral clusters support localized, bound excess electron ground states in about 50% of the configurations for the smallest cluster size studied (n = 20), and in almost all configurations for larger clusters (n > 66). The state is always exterior to the molecular frame, forming typically a diffuse surface state. Both cluster size and temperature dependence of energetic and structural properties of the clusters and the electron distribution are explored. We show that the stabilization of the electron is strongly correlated with the preexisting instantaneous dipole moment of the neutral clusters, and its ground state energy is reflected in the electronic radius. The findings are consistent with electron attachment via an initial surface state. The hypothetical spectral dynamics following such attachment is also discussed.
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Affiliation(s)
- László Turi
- Department of Physical Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest 112, Hungary.
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27
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Burnham CJ, Petersen MK, Day TJF, Iyengar SS, Voth GA. The properties of ion-water clusters. II. Solvation structures of Na+, Cl−, and H+ clusters as a function of temperature. J Chem Phys 2006; 124:024327. [PMID: 16422603 DOI: 10.1063/1.2149375] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Ion-water-cluster properties are investigated both through the multistate empirical valence bond potential and a polarizable model. Equilibrium properties of the ion-water clusters H+(H2O)100, Na+(H2O)100, Na+(H2O)20, and Cl-(H2O)17 in the temperature region 100-450 K are explored using a hybrid parallel basin-hopping and tempering algorithm. The effect of the solid-liquid phase transition in both caloric curves and structural distribution functions is investigated. It is found that sodium and chloride ions largely reside on the surface of water clusters below the cluster melting temperature but are solvated into the interior of the cluster above the melting temperature, while the solvated proton was found to have significant propensity to reside on or near the surface in both the liquid- and solid-state clusters.
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Affiliation(s)
- Christian J Burnham
- Department of Chemistry and Center for Biophysical Modeling and Simulation, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112-0850, USA
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28
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Sommerfeld T, Jordan KD. Quantum Drude Oscillator Model for Describing the Interaction of Excess Electrons with Water Clusters: An Application to (H2O)13-. J Phys Chem A 2005; 109:11531-8. [PMID: 16354045 DOI: 10.1021/jp053768k] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cluster anions for which the excess electron occupies an extended nonvalence orbital can be described by use of a model Hamiltonian employing quantum Drude oscillators to represent the polarizable charge distributions of the monomers. In this work, a Drude model for water cluster anions is described and used to investigate the (H2O)13(-) cluster. Several low-energy isomers are characterized, and the finite-temperature properties of the cluster are investigated by means of parallel tempering Monte Carlo simulations. Two structural motifs, one with double-acceptor water monomers and the other with four-membered rings of double-acceptor single-donor monomers with four free OH groups pointed in the same direction, are found to lead to large (approximately > eV) electron binding energies. The distributions of the computed vertical detachment energies qualitatively reproduce the experimentally measured photoelectron spectrum, and our simulations indicate that both of the main peaks in the measured spectrum derive from several isomers.
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Affiliation(s)
- Thomas Sommerfeld
- University of Pittsburgh, Department of Chemistry, and Center for Molecular and Materials Simulation, Chevron Science Center, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA.
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29
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Pav DM, Curotto E. Parallel tempering simulations of the 13-center Lennard-Jones dipole-dipole cluster (muD=0-->0.5 a.u.). J Chem Phys 2005; 123:144301. [PMID: 16238385 DOI: 10.1063/1.2049279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigate the thermodynamic behavior of the thirteen center uniform Lennard-Jones dipole-dipole cluster [(LJDD)(13)] for a wide range of dipole moment strengths. We find a relatively wide range of potential parameters where solid-solid coexistence manifests itself. Using structural characterization methods we determine the shape of the few isomers that contribute to the solid-solid coexistence region. The thermal distributions of the size of the net dipole moment are broad even at the coldest temperatures of the simulation where the (LJDD)(13) cluster is solid.
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Affiliation(s)
- Dawn M Pav
- Department of Chemistry and Physics, Arcadia University, Glenside, Pennsylvania 19038, USA
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30
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Myshakin EM, Diri K, Jordan KD. Theoretical Investigation of the Neutral Precursor of (H2O)6-. J Phys Chem A 2004. [DOI: 10.1021/jp048726v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Evgeniy M. Myshakin
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Kadir Diri
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Kenneth D. Jordan
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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