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Mones L, Pohl G, Turi L. Ab initio molecular dynamics study of solvated electrons in methanol clusters. Phys Chem Chem Phys 2018; 20:28741-28750. [DOI: 10.1039/c8cp05052j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stable surface excess electronic states in small methanol cluster anions were identified and characterized in ab initio molecular dynamics simulations.
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Affiliation(s)
- Letif Mones
- Mathematics Institute
- University of Warwick
- Zeeman Building
- Coventry
- UK
| | - Gábor Pohl
- Department of Chemistry
- Hunter College
- CUNY
- New York
- USA
| | - László Turi
- Eötvös Loránd University
- Department of Physical Chemistry
- Hungary
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2
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Pohl G, Mones L, Turi L. Excess electrons in methanol clusters: Beyond the one-electron picture. J Chem Phys 2016; 145:164313. [PMID: 27802653 DOI: 10.1063/1.4964845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We performed a series of comparative quantum chemical calculations on various size negatively charged methanol clusters, CH3OHn-. The clusters are examined in their optimized geometries (n = 2-4), and in geometries taken from mixed quantum-classical molecular dynamics simulations at finite temperature (n = 2-128). These latter structures model potential electron binding sites in methanol clusters and in bulk methanol. In particular, we compute the vertical detachment energy (VDE) of an excess electron from increasing size methanol cluster anions using quantum chemical computations at various levels of theory including a one-electron pseudopotential model, several density functional theory (DFT) based methods, MP2 and coupled-cluster CCSD(T) calculations. The results suggest that at least four methanol molecules are needed to bind an excess electron on a hydrogen bonded methanol chain in a dipole bound state. Larger methanol clusters are able to form stronger interactions with an excess electron. The two simulated excess electron binding motifs in methanol clusters, interior and surface states, correlate well with distinct, experimentally found VDE tendencies with size. Interior states in a solvent cavity are stabilized significantly stronger than electron states on cluster surfaces. Although we find that all the examined quantum chemistry methods more or less overestimate the strength of the experimental excess electron stabilization, MP2, LC-BLYP, and BHandHLYP methods with diffuse basis sets provide a significantly better estimate of the VDE than traditional DFT methods (BLYP, B3LYP, X3LYP, PBE0). A comparison to the better performing many electron methods indicates that the examined one-electron pseudopotential can be reasonably used in simulations for systems of larger size.
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Affiliation(s)
- Gábor Pohl
- Department of Physical Chemistry, Eötvös Loránd University, P. O. Box 32, Budapest 112 H-1518, Hungary
| | - Letif Mones
- Engineering Department, University of Cambridge, Cambridge CB2 1PZ, United Kingdom
| | - László Turi
- Department of Physical Chemistry, Eötvös Loránd University, P. O. Box 32, Budapest 112 H-1518, Hungary
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Walker JA, Bartels DM. A Simple ab Initio Model for the Solvated Electron in Methanol. J Phys Chem A 2016; 120:7240-7. [PMID: 27599299 DOI: 10.1021/acs.jpca.6b07955] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solvation structure of a solvated electron in methanol is investigated with ab initio calculations of small anion methanol clusters in a polarized dielectric continuum. We find that the lowest-energy structure in best agreement with experiment, calculated with CCSD, MP2, and B3LYP methods with aug-cc-pvdz basis set, is a tetrahedral arrangement of four methanol molecules with OH bonds oriented toward the center. The optimum distance from the tetrahedron center to the hydroxyl protons is ∼1.8 Å, significantly smaller than previous estimates. We are able to reproduce experimental radius of gyration Rg (deduced from optical absorption), vertical detachment energy, and resonance Raman frequencies. The electron paramagnetic resonance g-factor shift is qualitatively reproduced using density functional theory.
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Affiliation(s)
- J A Walker
- Radiation Laboratory and Dept. of Chemistry & Biochemistry, Notre Dame University , Notre Dame, Indiana 46556, United States
| | - D M Bartels
- Radiation Laboratory and Dept. of Chemistry & Biochemistry, Notre Dame University , Notre Dame, Indiana 46556, United States
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Zhao J, Wang M, Fu A, Yang H, Bu Y. Hydrated Electron Transfer to Nucleobases in Aqueous Solutions Revealed by Ab Initio Molecular Dynamics Simulations. Chemphyschem 2015; 16:2348-56. [DOI: 10.1002/cphc.201500040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Indexed: 11/07/2022]
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Trukhan SN, Yudanov VF, Tormyshev VM, Rogozhnikova OY, Trukhin DV, Bowman MK, Krzyaniak MD, Chen H, Martyanov ON. Hyperfine interactions of narrow-line trityl radical with solvent molecules. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2013; 233:29-36. [PMID: 23722184 PMCID: PMC3713100 DOI: 10.1016/j.jmr.2013.04.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 04/28/2013] [Accepted: 04/30/2013] [Indexed: 05/09/2023]
Abstract
The electron nuclear dipolar interactions responsible for some dynamic nuclear polarization (DNP) mechanisms also are responsible for the presence formally in CW EPR spectra of forbidden satellite lines in which both the electron spin and a nuclear spin flip. Such lines arising from (1)H nuclei are easily resolved in CW EPR measurements of trityl radicals, a popular family of DNP reagents. The satellite lines overlap some of the hyperfine features from (13)C in natural abundance in the trityl radical, but their intensity can be easily determined by simple simulations of the EPR spectra using the hyperfine parameters of the trityl radical. Isotopic substitution of (2)H for (1)H among the hydrogens of the trityl radical and/or the solvent allows the dipolar interactions from the (1)H on the trityl radical and from the solvent to be determined. The intensity of the dipolar interactions, integrated over all the (1)H in the system, is characterized by the traditional parameter called reff. For the so-called Finland trityl in methanol, the reff values indicate that collectively the (1)H in the unlabeled solvent have a stronger integrated dipolar interaction with the unpaired electron spin of the Finland trityl than do the (1)H in the radical and consequently will be a more important DNP route. Although reff has the dimensions of distance, it does not correspond to any simple physical dimension in the trityl radical because the details of the unpaired electron spin distribution and the hydrogen distribution are important in the case of trityls.
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Affiliation(s)
- S N Trukhan
- Boreskov Institute of Catalysis, pr. Ak. Lavrentieva, 5, Novosibirsk 630090, Russia.
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Shreve AT, Elkins MH, Neumark DM. Photoelectron spectroscopy of solvated electrons in alcohol and acetonitrile microjets. Chem Sci 2013. [DOI: 10.1039/c3sc22063j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Affiliation(s)
- Ryan M. Young
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
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Mones L, Rossky PJ, Turi L. Quantum-classical simulation of electron localization in negatively charged methanol clusters. J Chem Phys 2011; 135:084501. [PMID: 21895193 DOI: 10.1063/1.3624366] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Letif Mones
- Department of Physical Chemistry, Eötvös Loránd University, P. O. Box 32, H-1518, Budapest 112, Hungary.
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Young RM, Yandell MA, Neumark DM. Dynamics of electron solvation in I−(CH3OH)n clusters (4 ≤ n ≤ 11). J Chem Phys 2011; 134:124311. [DOI: 10.1063/1.3563720] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Mones L, Rossky PJ, Turi L. Analysis of localization sites for an excess electron in neutral methanol clusters using approximate pseudopotential quantum-mechanical calculations. J Chem Phys 2010; 133:144510. [PMID: 20950020 DOI: 10.1063/1.3503506] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Letif Mones
- Department of Physical Chemistry, Eötvös Loránd University, Budapest 112, P. O. Box 32, H-1518, Hungary.
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Shen H, Kurahashi N, Horio T, Sekiguchi K, Suzuki T. Direct Measurement of Vertical Electron Binding Energies of Solvated Electrons in Methanol and Ethanol. CHEM LETT 2010. [DOI: 10.1246/cl.2010.668] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Mones L, Turi L. A new electron-methanol molecule pseudopotential and its application for the solvated electron in methanol. J Chem Phys 2010; 132:154507. [DOI: 10.1063/1.3385798] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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Stuart CM, Tauber MJ, Mathies RA. Structure and Dynamics of the Solvated Electron in Alcohols from Resonance Raman Spectroscopy. J Phys Chem A 2007; 111:8390-400. [PMID: 17676822 DOI: 10.1021/jp068283q] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Resonance Raman (RR) spectroscopy is used to probe the structure and excited-state dynamics of the solvated electron in the primary liquid alcohols methanol (MeOH), ethanol (EtOH), n-propanol (n-PrOH), and n-butanol (n-BuOH). The strong resonance enhancements (>or=10(4) relative to pure solvent) of the libration, CO stretch, COH bend, CH3 bend, CH2 bend, and OH stretch reveal significant Franck-Condon coupling of the intermolecular and intramolecular vibrational modes of the solvent to the electronic excitation of the solvated electron. All enhanced bands are fully accounted for by a model of the solvated electron that is comprised of several nearby solvent molecules that are only perturbed by the presence of the electron; no new molecular species are required to explain our data. The 340 cm(-1) downshift observed for the OH stretch frequency of e-(MeOH), relative to pure solvent, strongly suggests that the methanol molecules in the first solvent shell have the hydroxyl group directed linearly toward the excess electron density. The smaller downshifts observed for e-(EtOH), e-(n-PrOH), and e-(n-BuOH) are explained in terms of a OH group that is bent 28-40 degrees from linear. The Raman cross sections and absorption spectra are modeled, lending quantitative support for the inhomogeneous origin of the broad absorption spectra, the necessity of OH local motion in all enhanced Raman modes of the alcohols, and the dominant librational response of the solvent upon photoexcitation of the electron.
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Affiliation(s)
- Christina M Stuart
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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Snee PT, Garrett-Roe S, Harris CB. Dynamics of an Excess Electron at Metal/Polar Interfaces. J Phys Chem B 2003. [DOI: 10.1021/jp022665o] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Preston T. Snee
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley, National Laboratory, Berkeley, California 94720
| | - Sean Garrett-Roe
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley, National Laboratory, Berkeley, California 94720
| | - Charles B. Harris
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley, National Laboratory, Berkeley, California 94720
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Mizuno M, Tahara T. Novel Resonance Raman Enhancement of Local Structure around Solvated Electrons in Water. J Phys Chem A 2001. [DOI: 10.1021/jp0119173] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Misao Mizuno
- Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8585, Japan, and The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako 351-0198, Japan
| | - Tahei Tahara
- Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8585, Japan, and The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako 351-0198, Japan
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Mináry P, Turi L, Rossky PJ. Nonadiabatic molecular dynamics simulation of photoexcitation experiments for the solvated electron in methanol. J Chem Phys 1999. [DOI: 10.1063/1.479032] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Affiliation(s)
- Wenyun Lu
- Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Shihe Yang
- Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Mosyak A, Rossky PJ, Turi L. A dynamical analysis of energy level fluctuations for an excess electron in methanol. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(97)01336-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zhu J, Cukier RI. A quantum molecular dynamics simulation of an excess electron in methanol. J Chem Phys 1993. [DOI: 10.1063/1.464883] [Citation(s) in RCA: 53] [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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Smirnov S, Anisimov O, Molin Y. Application of the OD ESR method for studying the molecular structure of excess electron trap in γ-irradiated hydrocarbons. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)85084-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jonah CD, Romero C, Rahman A. Hydrated electron revisited via the feynman path integral route. Chem Phys Lett 1986. [DOI: 10.1016/0009-2614(86)80014-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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ESR study of proton spin-flip satellite lines associated with ClO3 in a single crystal of γ-irradiated Ba(ClO4)2·3H2O. Chem Phys Lett 1980. [DOI: 10.1016/0009-2614(80)80522-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ichikawa T, Kevan L. Electron spin echo modulation studies of tetracyanoethylene anion solvation in methanol, acetone, and dimethylsulfoxide: Evidence for molecular dipole oriented solvation shells around large anions. J Chem Phys 1980. [DOI: 10.1063/1.439474] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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