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Ree J, Ko KC, Kim YH, Shin HK. Vibrational Energy Flow in the Uracil-H 2O Complexes. J Phys Chem B 2021; 125:874-882. [PMID: 33444503 DOI: 10.1021/acs.jpcb.0c10733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the uracil-H2O complex, the vibrational energy initially stored in the OH(v = 1) stretch efficiently transfers to the first overtone-bending mode under a near-resonant condition. The relaxation of the overtone vibration redistributes its energy to uracil and the two hydrogen bonds in the intermolecular zone, which consists of the OH bond and the bonds between nearby C, N, O, and H atoms of uracil. The uracil NH bond and the hydrogen bond it formed with the H2O molecule, N-H···O, store the major portion of the energy released by the relaxing bending mode, thus forming a localized hot band in the intermolecular zone. Energy transfer to the bonds beyond the zone is found to be not significant. The excited uracil NH is found to transfer its energy to the bending mode, thus indicating that the hydrogen bond of N-H···O is the principal energy pathway in both directions. In the presence of efficient near-resonant energy transfer pathways, the time evolution of the centers of mass distance shows the phenomenon of beats. One global and two different local minima energy structures are considered. The results of energy transfer do not differ significantly, suggesting that the two hydrogen bonds in all three structures have similar contributions to the energy transfer.
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Affiliation(s)
- Jongbaik Ree
- Department of Chemistry Education, Chonnam National University, Gwangju 61186, Korea
| | - Kyoung Chul Ko
- Department of Chemistry Education, Chonnam National University, Gwangju 61186, Korea
| | - Yoo Hang Kim
- Department of Chemistry, Inha University, Incheon 22212, Korea
| | - Hyung K Shin
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
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2
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Breslavskaya NN, Buchachenko AL. Isotope Effects Induced by Molecular Compression. J Phys Chem A 2020; 124:6352-6355. [PMID: 32663008 DOI: 10.1021/acs.jpca.0c05567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Zero-point energies (ZPEs) of hydroxyl ion and hydrogen and water molecules, free and compressed in C60 cages, are computed; the excess energy acquired by molecules under compression is in the range 2-3 kcal/mol and depends on the isotopes. The differences in ZPE of compressed isotopic molecules strongly exceed those of the free molecules, resulting in the large deuterium and tritium isotope effects. These effects induced by compression are suggested as a probe for testing molecular compression of enzymatic sites; they may be important for understanding enormously large isotope effects observed in some enzymatic reactions, where they are attributed to the tunneling.
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Affiliation(s)
- Natalia N Breslavskaya
- Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 117907, Russia.,Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russian Federation
| | - Anatoly L Buchachenko
- Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russian Federation.,Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russian Federation.,Scientific Center of the Russian Academy of Sciences, Chernogolovka 142432, Russian Federation.,Moscow State University, Moscow 119992, Russian Federation
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3
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Yamakawa K, Nasu H, Suzuki N, Shimizu G, Arakawa I. Terahertz and mid-infrared spectroscopy of matrix-isolated clusters and matrix-sublimation ice of D 2O. J Chem Phys 2020; 152:174310. [PMID: 32384850 DOI: 10.1063/5.0005766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have established an apparatus for terahertz and mid-infrared spectroscopy in an ultrahigh vacuum and have measured absorption spectra of D2O clusters trapped in solid Ar. To assign terahertz absorption peaks due to the D2O dimer, trimer, and tetramer, the dependence of the spectrum on the annealing temperature and D2O dilution was analyzed. The assignment was also examined by ab initio calculations with the use of the "our own N-layered integrated molecular orbital and molecular mechanics" method, where the flexibility of surrounding Ar atoms was systematically incorporated. We identified all the intermolecular fundamentals of the dimer and those with significant intensities of the trimer and tetramer, whose structural symmetries were revealed to be broken down. After isolating the D2O clusters in solid Ar, we sublimated only Ar atoms to leave behind matrix-sublimation ice, which was found to be amorphous- or crystal-like depending on the formation conditions: the dilution and sublimation temperature. The crystallinity of matrix-sublimation ice was determined by decomposing its terahertz spectrum into the spectra of amorphous and crystalline ices. Since the crystallinity got higher by raising the dilution and sublimation temperature, the diffusion of the D2O monomer on the surface of sublimating solid Ar was found to be crucial to the crystallization of the sublimation ice.
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Affiliation(s)
- Koichiro Yamakawa
- Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1195, Japan
| | - Hirokazu Nasu
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Natsumi Suzuki
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Genki Shimizu
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Ichiro Arakawa
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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4
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Shin HK. Inter- and Intramolecular Vibrational Energy Flow in a Formamide–Water Complex. J Phys Chem A 2020; 124:3031-3037. [PMID: 32227959 DOI: 10.1021/acs.jpca.0c00584] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- H. K. Shin
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
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5
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Affiliation(s)
- Jongbaik Ree
- Department of Chemistry EducationChonnam National University Gwangju 61186 South Korea
| | - Yoo Hang Kim
- Department of ChemistryInha University Incheon 22212 South Korea
| | - Hyung Kyu Shin
- Department of ChemistryUniversity of Nevada Reno 89557 USA
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6
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Andersen J, Larsen RW, Ceponkus J, Uvdal P, Nelander B. Far-Infrared Investigation of the Benzene–Water Complex: The Identification of Large-Amplitude Motion and Tunneling Pathways. J Phys Chem A 2019; 124:513-519. [DOI: 10.1021/acs.jpca.9b01497] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - R. Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - J. Ceponkus
- Department of General Physics and Spectroscopy, Vilnius University, Sauletekio 9, LT-10007 Vilnius, Lithuania
| | - P. Uvdal
- Chemical Physics, Department of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - B. Nelander
- Chemical Physics, Department of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
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7
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Boettger JD, Kubicki JD. Evaluating Computational Chemistry Methods for Isotopic Fractionation between CO 2(g) and H 2O(g). J Chem Inf Model 2019; 59:4663-4677. [PMID: 31689097 DOI: 10.1021/acs.jcim.9b00392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantum mechanical calculations can be useful in predicting equilibrium isotopic fractionations of geochemical reactions. However, these computational chemistry methods vary widely in their effectiveness in the prediction of various physical observables. Most studies employing the approach known as density functional theory (DFT) to model these observable quantities focus on predictive accuracy for energetics and geometries. In this study, several density functionals are evaluated against experimental bond lengths, harmonic vibrational frequencies, frequency shifts upon isotopic substitution, and 18O/16O isotopic fractionation between CO2(g) and H2O(g). Successful prediction of harmonic vibrational frequencies strongly correlates with successful prediction of isotopic fractionation, despite the possible introduction of errors by the harmonic approximation. Harmonic experimental frequencies, not anharmonic ones, must be used when comparing spectra and when predicting isotope fractionation. The B3LYP and X3LYP functionals perform more accurately in the evaluation of both harmonic vibrational frequencies and isotopic fractionation factors using the 6-311+G(d,p) and 6-311++G(2d,p) basis sets, achieving fractionation factor errors of 0.2-0.6‰ at 25 °C out of a total fractionation of 51‰. Error cancellation between vibrational frequencies and the harmonic approximation is crucial to their success. The above combination of exchange-correlation functionals and basis sets also well predicts the vibrational properties of interacting CO2 and H2O molecules, suggesting that they may be applicable to more complex geochemical reactions involving C and O isotopic fractionations.
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Affiliation(s)
- Jason D Boettger
- Department of Geological Sciences , University of Texas at El Paso , El Paso , Texas 77968 , United States
| | - James D Kubicki
- Department of Geological Sciences , University of Texas at El Paso , El Paso , Texas 77968 , United States
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8
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Harabuchi Y, Tani R, De Silva N, Njegic B, Gordon MS, Taketsugu T. Anharmonic vibrational computations with a quartic force field for curvilinear coordinates. J Chem Phys 2019. [DOI: 10.1063/1.5096167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yu Harabuchi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Ryosuke Tani
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Nuwan De Silva
- Department of Physical and Biological Sciences, Western New England University, Springfield, Massachusetts 01119, USA
| | - Bosiljka Njegic
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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9
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Pitsevich G, Malevich A, Kozlovskaya E, Sablinskas V, Balevicius V. Anharmonicity of the bonded O H group vibrations in water dimer. DFT study including dispersion interaction. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Peng Y, Yang Y, Sun Y, Huang Y, Sun CQ. Phonon abundance-stiffness-lifetime transition from the mode of heavy water to its confinement and hydration. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Mihrin D, Andersen J, Jakobsen PW, Wugt Larsen R. Highly localized H 2O librational motion as a far-infrared spectroscopic probe for microsolvation of organic molecules. Phys Chem Chem Phys 2019; 21:1717-1723. [PMID: 30623967 DOI: 10.1039/c8cp05985c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The most prominent spectroscopic observable for the hydrogen bonding between individual molecules in liquid water is the broad absorption band detected in the spectral region between 300 and 900 cm-1. The present work demonstrates how the associated large-amplitude out-of-plane OH librational motion of H2O molecules also directly reflects the microsolvation of organic compounds. This highly localized OH librational motion of the first solvating H2O molecule causes a significant change of dipole moment and gives rise to a strong characteristic band in the far-infrared spectral region, which is correlated quantitatively with the complexation energy. The out-of-plane OH librational band origins ranging from 324.5 to 658.9 cm-1 have been assigned experimentally for a series of four binary hydrogen-bonded H2O complexes embedded in solid neon involving S-, O- and N-containing compounds with increasing hydrogen bond acceptor capability. The hydrogen bond energies for altogether eight binary H2O complexes relative to the experimental value of 13.2 ± 0.12 kJ mol-1 for the prototypical (H2O)2 system [Rocher-Casterline et al., J. Chem. Phys., 2011, 134, 211101] are revealed directly by these far-infrared spectroscopic observables. The far-infrared spectral signatures are able to capture even minor differences in the hydrogen bond acceptor capability of O atoms with slightly different alkyl substituents in the order H-O-C(CH3)3 > CH3-O-CH3 > H-O-CH(CH3)2 > H-O-CH2CH3.
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Affiliation(s)
- D Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
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12
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Mihrin D, Wugt Larsen R. THz spectroscopy of weakly bound cluster molecules in solid para-hydrogen: a sensitive probe of van der Waals interactions. Phys Chem Chem Phys 2018; 21:349-358. [PMID: 30525164 DOI: 10.1039/c8cp05060k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work demonstrates that 99.9% enriched solid para-H2 below 3 K provides an excellent inert and transparent medium for the exploration of large-amplitude intermolecular vibrational motion of weakly bound van der Waals cluster molecules in the THz spectral region. THz absorption spectra have been generated for CO2/H2O and CS2/H2O mixtures embedded in enriched solid para-H2 and numerous observed transitions associated with large-amplitude librational motion of the weakly bound binary CO2H2O and CS2H2O van der Waals cluster molecules have been assigned together with tentative assignments for the ternary CS2(H2O)2 system. The interaction strength, directionality and anharmonicity of the weak van der Waals "bonds" between the molecules can be characterized via these THz spectral signatures and yield rigorous benchmarks for high-level ab initio methodologies. It is suggested that even a less stable linear conformation of the ternary CS2(H2O)2 system, where one H2O molecule is linked to each S atom of the CS2 subunit, may be formed due to the kinetics associated with the mobility of free H2O molecules in the soft para-H2 medium. In addition, the spectroscopic observations confirm a linear and planar global intermolecular potential energy minimum for the binary CS2H2O system with C2v symmetry, where the O atom on the H2O molecule is linked to one of the S atoms on the CS2 subunit. A semi-experimental value for the vibrational zero-point energy contribution of 1.93 ± 0.10 kJ mol-1 from the class of large-amplitude intermolecular vibrational modes is proposed. The combination with CCSD(T)/CBS electronic energy predictions provides a semi-experimental estimate of 5.08 ± 0.15 kJ mol-1 for the binding energy D0 of the CS2H2O van der Waals system.
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Affiliation(s)
- D Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
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13
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Sun CQ. Aqueous charge injection: solvation bonding dynamics, molecular nonbond interactions, and extraordinary solute capabilities. INT REV PHYS CHEM 2018. [DOI: 10.1080/0144235x.2018.1544446] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chang Q. Sun
- EBEAM, Yangtze Normal University, Chongqing, People's Republic of China
- NOVITAS, EEE, Nanyang Technological University, Singapore, Singapore
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14
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Shin HK. Relaxation of the H 2O Overtone Bending Vibration in the Water Dimer···Hydroxyl Radical Complex. J Phys Chem A 2018; 122:5510-5517. [PMID: 29846069 DOI: 10.1021/acs.jpca.8b03674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The relaxation mechanism of the overtone bending vibration in the collision of the water dimer with the vibrationally excited hydroxyl radical is studied by use of trajectory procedures. The transfer of the OH(v = 1) energy to the dimer stretches is followed by a near-resonant first overtone transition to the donor monomer. Nearly a quarter of the trajectories undergo a complex-mode collision, forming the (H2O)2···OH complex bound by a hydrogen bond with the lifetime ranging from a subpicosecond scale to >100 ps. The overtone vibration relaxes to the ground state, transferring approximately half of its energy to the dimer hydrogen-bonding (H2O···H2O) and the remaining half to the complex hydrogen-bonding (H2O)2···OH, via near-resonant pathways, each consisting of a series of intermolecular low-frequency vibrations.
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Affiliation(s)
- H K Shin
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
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15
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Buchachenko AL, Wasserman LA, Breslavskaya NN, Barashkova II. Noncovalent Hydrogen Isotope Effects in Paramagnetic Molecules. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2018. [DOI: 10.1134/s1990793118030053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Trajectory procedures are used to study the collision between the vibrationally excited H2O and the ground-state (H2O)2 with particular reference to energy transfer to the hydrogen bond through the inter- and intramolecular pathways. In nearly 98% of the trajectories, energy transfer processes occur on a subpicosecond scale (≤0.7 ps). The H2O transfers approximately three-quarters of its excitation energy to the OH stretches of the dimer. The first step of the intramolecular pathway in the dimer involves a near-resonant first overtone transition from the OH stretch to the bending mode. The energy transfer probability in the presence of the 1:2 resonance is 0.61 at 300 K. The bending mode then redistributes its energy to low-frequency intermolecular vibrations in a series of small excitation steps, with the pathway which results in the hydrogen-bonding modes gaining most of the available energy. The hydrogen bonding in ∼50% of the trajectories ruptures on vibrational excitation, leaving one quantum in the bend of the monomer fragment. In a small fraction of trajectories, the duration of collision is longer than 1 ps, during which the dimer and H2O form a short-lived complex through a secondary hydrogen bond, which undergoes large amplitude oscillations.
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Affiliation(s)
- H K Shin
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
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17
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Buchachenko AL, Breslavskaya NN. Noncovalent Hydrogen Isotope Effects. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s003602441802005x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Andersen J, Voute A, Mihrin D, Heimdal J, Berg RW, Torsson M, Wugt Larsen R. Probing the global potential energy minimum of (CH2O)2: THz absorption spectrum of (CH2O)2 in solid neon and para-hydrogen. J Chem Phys 2017; 146:244311. [DOI: 10.1063/1.4990042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - A. Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - D. Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - J. Heimdal
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - R. W. Berg
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - M. Torsson
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - R. Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
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19
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Andersen J, Heimdal J, Nelander B, Wugt Larsen R. Competition between weak OH⋯π and CH⋯O hydrogen bonds: THz spectroscopy of the C2H2—H2O and C2H4—H2O complexes. J Chem Phys 2017; 146:194302. [PMID: 28527443 DOI: 10.1063/1.4983293] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- J Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - J Heimdal
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - B Nelander
- MAX-IV Laboratory, Lund University, P.O. Box 118, 22100 Lund, Sweden
| | - R Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
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20
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Monteiro JG, Barbosa AG. VSCF calculations for the intra- and intermolecular vibrational modes of the water dimer and its isotopologs. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.09.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Andersen J, Heimdal J, Wugt Larsen R. Spectroscopic identification of ethanol-water conformers by large-amplitude hydrogen bond librational modes. J Chem Phys 2016; 143:224315. [PMID: 26671383 DOI: 10.1063/1.4937482] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The far-infrared absorption spectra have been recorded for hydrogen-bonded complexes of water with ethanol embedded in cryogenic neon matrices at 2.8 K. The partial isotopic H/D-substitution of the ethanol subunit enabled by a dual inlet deposition procedure enables the observation and unambiguous assignment of the intermolecular high-frequency out-of-plane and the low-frequency in-plane donor OH librational modes for two different conformations of the mixed binary ethanol/water complex. The resolved donor OH librational bands confirm directly previous experimental evidence that ethanol acts as the O⋯HO hydrogen bond acceptor in the two most stable conformations. In the most stable conformation, the water subunit forces the ethanol molecule into its less stable gauche configuration upon dimerization owing to a cooperative secondary weak O⋯HC hydrogen bond interaction evidenced by a significantly blue-shift of the low-frequency in-plane donor OH librational band origin. The strong correlation between the low-frequency in-plane donor OH librational motion and the secondary intermolecular O⋯HC hydrogen bond is demonstrated by electronic structure calculations. The experimental findings are further supported by CCSD(T)-F12/aug-cc-pVQZ calculations of the conformational energy differences together with second-order vibrational perturbation theory calculations of the large-amplitude donor OH librational band origins.
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Affiliation(s)
- J Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - J Heimdal
- MAX-IV Laboratory, Lund University, P.O. Box 118, 22100 Lund, Sweden
| | - R Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
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Heger M, Andersen J, Suhm MA, Wugt Larsen R. The donor OH stretching–libration dynamics of hydrogen-bonded methanol dimers in cryogenic matrices. Phys Chem Chem Phys 2016; 18:3739-45. [DOI: 10.1039/c5cp07387a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
FTIR spectra of the methanol dimer trapped in neon matrices are presented.
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Affiliation(s)
- M. Heger
- Institut für Physikalische Chemie
- Universität Göttingen
- D-37077 Göttingen
- Germany
| | - J. Andersen
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kgs. Lyngby
- Denmark
| | - M. A. Suhm
- Institut für Physikalische Chemie
- Universität Göttingen
- D-37077 Göttingen
- Germany
| | - R. Wugt Larsen
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kgs. Lyngby
- Denmark
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23
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Cole WTS, Fellers RS, Viant MR, Leforestier C, Saykally RJ. Far-infrared VRT spectroscopy of the water dimer: Characterization of the 20 μm out-of-plane librational vibration. J Chem Phys 2015; 143:154306. [DOI: 10.1063/1.4933116] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- William T. S. Cole
- Department of Chemistry, University of California, Berkeley, California 94705, USA
| | - Ray S. Fellers
- Department of Chemistry, University of California, Berkeley, California 94705, USA
| | - Mark R. Viant
- Department of Chemistry, University of California, Berkeley, California 94705, USA
| | - Claude Leforestier
- Institut Charles Gerhardt UMR5253 CC15.01, CNRS and Universite Montpellier, 34095, Montpellier, Cedex 05, France
| | - Richard J. Saykally
- Department of Chemistry, University of California, Berkeley, California 94705, USA
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Andersen J, Heimdal J, Wugt Larsen R. The influence of large-amplitude librational motion on the hydrogen bond energy for alcohol–water complexes. Phys Chem Chem Phys 2015; 17:23761-9. [DOI: 10.1039/c5cp04321b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The intermolecular large-amplitude OH librational modes for mixed hydrogen-bonded complexes of water with methanol and t-butanol are unambiguously assigned for the first time.
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Affiliation(s)
- J. Andersen
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - J. Heimdal
- MAX-IV Laboratory
- Lund University
- 22100 Lund
- Sweden
| | - R. Wugt Larsen
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
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Andersen J, Heimdal J, Mahler DW, Nelander B, Larsen RW. Communication: THz absorption spectrum of the CO2-H2O complex: observation and assignment of intermolecular van der Waals vibrations. J Chem Phys 2014; 140:091103. [PMID: 24606346 DOI: 10.1063/1.4867901] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Terahertz absorption spectra have been recorded for the weakly bound CO2-H2O complex embedded in cryogenic neon matrices at 2.8 K. The three high-frequency van der Waals vibrational transitions associated with out-of-plane wagging, in-plane rocking, and torsional motion of the isotopic H2O subunit have been assigned and provide crucial observables for benchmark theoretical descriptions of this systems' flat intermolecular potential energy surface. A (semi)-empirical value for the zero-point energy of 273 ± 15 cm(-1) from the class of intermolecular van der Waals vibrations is proposed and the combination with high-level quantum chemical calculations provides a value of 726 ± 15 cm(-1) for the dissociation energy D0.
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Affiliation(s)
- J Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - J Heimdal
- MAX-IV Laboratory, Lund University, P. O. Box 118, 22100 Lund, Sweden
| | - D W Mahler
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - B Nelander
- MAX-IV Laboratory, Lund University, P. O. Box 118, 22100 Lund, Sweden
| | - R Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
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Ceponkus J, Uvdal P, Nelander B. Water Tetramer, Pentamer, and Hexamer in Inert Matrices. J Phys Chem A 2012; 116:4842-50. [DOI: 10.1021/jp301521b] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- J. Ceponkus
- MAX-IV Laboratory, Lund University, P.O.
Box 118, SE-22100 Lund, Sweden
| | - P. Uvdal
- MAX-IV Laboratory, Lund University, P.O.
Box 118, SE-22100 Lund, Sweden
- Chemical Physics, Department of
Chemistry, Lund University, P.O. Box 124,
SE-22100 Lund, Sweden
| | - B. Nelander
- MAX-IV Laboratory, Lund University, P.O.
Box 118, SE-22100 Lund, Sweden
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Ramya KR, Pavan Kumar GV, Venkatnathan A. Raman spectra of vibrational and librational modes in methane clathrate hydrates using density functional theory. J Chem Phys 2012; 136:174305. [DOI: 10.1063/1.4707933] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Blomquist J, Andersson MP, Uvdal P. Inducing H/D exchange in ultrathin ice films by proton deficiency. PHYSICAL REVIEW LETTERS 2011; 107:216101. [PMID: 22181898 DOI: 10.1103/physrevlett.107.216101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2011] [Indexed: 05/31/2023]
Abstract
We show that H/D exchange between H(2)O and D(2)O in ultrathin ice films adsorbed on Cu(100) does not occur through autoionization at temperatures below 140 K. The exchange is, however, facile if a proton deficiency is induced in the ice films by having small amounts of OH preadsorbed on the copper surface. The system was studied using surface infrared vibrational spectroscopy with the aid of density functional theory calculations.
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Affiliation(s)
- J Blomquist
- Chemical Physics, Department of Chemistry, Lund University, Sweden
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Temelso B, Shields GC. The Role of Anharmonicity in Hydrogen-Bonded Systems: The Case of Water Clusters. J Chem Theory Comput 2011; 7:2804-17. [DOI: 10.1021/ct2003308] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Berhane Temelso
- Dean’s Office, College of Arts and Sciences, Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
| | - George C. Shields
- Dean’s Office, College of Arts and Sciences, Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
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The vibrational spectrum of the water dimer: Comparison between anharmonic ab initio calculations and neon matrix infrared data between 14,000 and 90cm−1. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.05.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ceponkus J, Uvdal P, Nelander B. Observations of Host Guest Interactions Specific to Molecular Matrices: Water Monomers and Dimers in Hydrogen Matrices. J Phys Chem A 2011; 115:7921-7. [DOI: 10.1021/jp201751r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- J. Ceponkus
- MAX-lab, P. O. Box 118, and ‡Chemical Physics, Department of Chemistry, P. O. Box 124, Lund University, SE-22100 Lund, Sweden
| | - P. Uvdal
- MAX-lab, P. O. Box 118, and ‡Chemical Physics, Department of Chemistry, P. O. Box 124, Lund University, SE-22100 Lund, Sweden
| | - B. Nelander
- MAX-lab, P. O. Box 118, and ‡Chemical Physics, Department of Chemistry, P. O. Box 124, Lund University, SE-22100 Lund, Sweden
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Ceponkus J, Uvdal P, Nelander B. On the structure of the matrix isolated water trimer. J Chem Phys 2011; 134:064309. [DOI: 10.1063/1.3551622] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Ceponkus J, Uvdal P, Nelander B. Acceptor switching and axial rotation of the water dimer in matrices, observed by infrared spectroscopy. J Chem Phys 2010; 133:074301. [DOI: 10.1063/1.3460457] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Takahashi M, Kawazoe Y, Ishikawa Y, Ito H. Interpretation of temperature-dependent low frequency vibrational spectrum of solid-state benzoic acid dimer. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.08.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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