1
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Brás EM, Zimmermann C, Fausto R, Suhm MA. Benchmarking the anisotropy of nitroxyl radical solvation with IR spectroscopy. Phys Chem Chem Phys 2024; 26:5822-5829. [PMID: 38314587 DOI: 10.1039/d3cp05668f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Two simple nitroxyl radicals, di-tert-butyl nitroxyl (DTBN) and 2,2,6,6-tetramethylpiperidinyloxyl (TEMPO) are solvated by one or two water, methanol, tert-butyl alcohol or phenol molecules. The resulting low temperature IR spectra of the vacuum-isolated microsolvates in the OH stretching range are assigned based on harmonic DFT predictions for closed shell solvent dimers and trimers and their offset from experiment, to minimise theory-guided assignment bias. Systematic conformational preferences for the first and second solvent molecule are observed, depending on the conformational rigidity of the radical. These assignments are collected into an experimental benchmark data set and used to assess the spectral predicting power of different DFT approaches. The goal is to find inexpensive computational methods which provide reliable spectral predictions for this poorly explored class of microsolvates.
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Affiliation(s)
- Elisa M Brás
- University of Göttingen, Institute of Physical Chemistry, Tammannstr. 6, 37077 Göttingen, Germany.
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Charlotte Zimmermann
- University of Göttingen, Institute of Physical Chemistry, Tammannstr. 6, 37077 Göttingen, Germany.
| | - Rui Fausto
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University, Ataköy Campus, Bakirköy 34156, Istanbul, Turkey
| | - Martin A Suhm
- University of Göttingen, Institute of Physical Chemistry, Tammannstr. 6, 37077 Göttingen, Germany.
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2
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Brás EM, Fischer TL, Suhm MA. The Hydrates of TEMPO: Water Vibrations Reveal Radical Microsolvation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104496] [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)
- Elisa M. Brás
- CQC Department of Chemistry University of Coimbra 3004-535 Coimbra Portugal
- Institut für Physikalische Chemie Georg-August-Universität Göttingen Tammannstr. 6 37077 Göttingen Germany
| | - Taija L. Fischer
- Institut für Physikalische Chemie Georg-August-Universität Göttingen Tammannstr. 6 37077 Göttingen Germany
| | - Martin A. Suhm
- Institut für Physikalische Chemie Georg-August-Universität Göttingen Tammannstr. 6 37077 Göttingen Germany
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3
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Brás EM, Fischer TL, Suhm MA. The Hydrates of TEMPO: Water Vibrations Reveal Radical Microsolvation. Angew Chem Int Ed Engl 2021; 60:19013-19017. [PMID: 34165885 PMCID: PMC8456822 DOI: 10.1002/anie.202104496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/01/2021] [Indexed: 12/12/2022]
Abstract
An organic radical monohydrate complex is detected in vacuum isolation at low temperature by FTIR supersonic jet spectroscopy for the first time. It is shown to exhibit a rich conformational and vibrational coupling dynamics, which can be drastically reduced by appropriate isotope substitution. Its detection with a new gas recycling infrared spectrometer demonstrates the thermal metastability of the gaseous TEMPO radical even under humid gas conditions. Compared to its almost isoelectronic and isostructural, closed shell ketone analogue, the hydrogen bond of the solvating water is found to be less directional, but stronger and more strongly downshifting the bonded water OH stretch vibration. A second solvent water directs the first one into a metastable hydrogen bond position to solvate the nitrogen center and the first water at the same time.
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Affiliation(s)
- Elisa M. Brás
- CQCDepartment of ChemistryUniversity of Coimbra3004-535CoimbraPortugal
- Institut für Physikalische ChemieGeorg-August-Universität GöttingenTammannstr. 637077GöttingenGermany
| | - Taija L. Fischer
- Institut für Physikalische ChemieGeorg-August-Universität GöttingenTammannstr. 637077GöttingenGermany
| | - Martin A. Suhm
- Institut für Physikalische ChemieGeorg-August-Universität GöttingenTammannstr. 637077GöttingenGermany
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4
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Apostolidou C. Vibrational Spectra of the OH Radical in Water: Ab Initio Molecular Dynamics Simulations and Quantum Chemical Calculations Using Hybrid Functionals. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Christina Apostolidou
- Mulliken Center for Theoretical Chemistry Institute of Physical and Theoretical Chemistry Rheinische Friedrich‐Wilhelms‐Universität Bonn Beringstraße 4 Bonn 53115 Germany
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5
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Mao Y, Levine DS, Loipersberger M, Horn PR, Head-Gordon M. Probing radical-molecule interactions with a second generation energy decomposition analysis of DFT calculations using absolutely localized molecular orbitals. Phys Chem Chem Phys 2020; 22:12867-12885. [PMID: 32510096 DOI: 10.1039/d0cp01933j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Intermolecular interactions between radicals and closed-shell molecules are ubiquitous in chemical processes, ranging from the benchtop to the atmosphere and extraterrestrial space. While energy decomposition analysis (EDA) schemes for closed-shell molecules can be generalized for studying radical-molecule interactions, they face challenges arising from the unique characteristics of the electronic structure of open-shell species. In this work, we introduce additional steps that are necessary for the proper treatment of radical-molecule interactions to our previously developed unrestricted Absolutely Localized Molecular Orbital (uALMO)-EDA based on density functional theory calculations. A "polarize-then-depolarize" (PtD) scheme is used to remove arbitrariness in the definition of the frozen wavefunction, rendering the ALMO-EDA results independent of the orientation of the unpaired electron obtained from isolated fragment calculations. The contribution of radical rehybridization to polarization energies is evaluated. It is also valuable to monitor the wavefunction stability of each intermediate state, as well as their associated spin density profiles, to ensure the EDA results correspond to a desired electronic state. These radical extensions are incorporated into the "vertical" and "adiabatic" variants of uALMO-EDA for studies of energy changes and property shifts upon complexation. The EDA is validated on two model complexes, H2O˙F and FH˙OH. It is then applied to several chemically interesting radical-molecule complexes, including the sandwiched and T-shaped benzene dimer radical cation, complexes of pyridine with benzene and naphthalene radical cations, binary and ternary complexes of the hydroxyl radical with water (˙OH(H2O) and ˙OH(H2O)2), and the pre-reactive complexes and transition states in the ˙OH + HCHO and ˙OH + CH3CHO reactions. These examples suggest that this second generation uALMO-EDA is a useful tool for furthering one's understanding of both energetic and property changes associated with radical-molecule interactions.
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Affiliation(s)
- Yuezhi Mao
- Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California at Berkeley, Berkeley, CA 94720, USA.
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6
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Gao A, Li G, Peng B, Weidman JD, Xie Y, Schaefer HF. The water trimer reaction OH + (H 2O) 3→ (H 2O) 2OH + H 2O. Phys Chem Chem Phys 2020; 22:9767-9774. [PMID: 32338658 DOI: 10.1039/d0cp01418d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
All important stationary points on the potential energy surface (PES) for the reaction OH + (H2O)3→ (H2O)2OH + H2O have been fully optimized using the "gold standard" CCSD(T) method with the large Dunning correlation-consistent cc-pVQZ basis sets. Three types of pathways were found. For the pathway without hydrogen abstraction, the barrier height of the transition state (TS1) is predicted to lie 5.9 kcal mol-1 below the reactants. The two major complexes (H2O)3OH (CP1 and CP2a) are found to lie 6.3 and 11.0 kcal mol-1, respectively, below the reactants [OH + (H2O)3]. For one of the H-abstraction pathways the lowest classical barrier height is predicted to be much higher, 6.1 kcal mol-1 (TS2a) above the reactants. For the other H-abstraction pathway the barrier height is even higher, 15.0 (TS3) kcal mol-1. Vibrational frequencies and the zero-point vibrational energies connected to the PES are also reported. The energy barriers for the H-abstraction pathways are compared with those for the OH + (H2O)2 and OH + H2O reactions, and the effects of the third water on the energetics are usually minor (0.2 kcal mol-1).
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Affiliation(s)
- Aifang Gao
- School of Water Resources and Environment, Hebei GEO University, Shijiazhuang, 050031, China
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7
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Christensen EG, Steele RP. Stepwise Activation of Water by Open-Shell Interactions, Cl(H 2O) n=4–8,17. J Phys Chem A 2020; 124:3417-3437. [DOI: 10.1021/acs.jpca.0c01544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elizabeth G. Christensen
- 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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8
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Christensen EG, Steele RP. Probing the Partial Activation of Water by Open-Shell Interactions, Cl(H 2O) 1-4. J Phys Chem A 2019; 123:8657-8673. [PMID: 31513400 DOI: 10.1021/acs.jpca.9b07235] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The partial chemical activation of water by reactive radicals was examined computationally for small clusters of chlorine and water, Cl•(H2O)n=1-4. Using an automated isomer-search procedure, dozens of unique, stable structures were computed. Among the resulting structural classes were intact, hydrated-chlorine isomers, as well as hydrogen-abstracted (HCl)(OH)(H2O)n-1 configurations. The latter showed increased stability as the degree of hydration increased, until n = 4, where a new class of structures was discovered with a chloride ion bound to an oxidized water network. The electronic structure of these three structural classes was investigated, and spectral signatures of this hydration-based evolution were connected to these electronic properties. An ancillary outcome of this detailed computational analysis, including coupled-cluster benchmarks, was the calibration of cost-effective quantum chemistry methods for future studies of these radical-water complexes.
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Affiliation(s)
- Elizabeth G Christensen
- 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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9
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Brown AR, Brice JT, Franke PR, Douberly GE. Infrared Spectrum of Fulvenallene and Fulvenallenyl in Helium Droplets. J Phys Chem A 2019; 123:3782-3792. [DOI: 10.1021/acs.jpca.9b01661] [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)
- Alaina R. Brown
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Joseph T. Brice
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Peter R. Franke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Gary E. Douberly
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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10
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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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11
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Jara-Toro RA, Hernández FJ, Garavagno MDLA, Taccone RA, Pino GA. Water catalysis of the reaction between hydroxyl radicals and linear saturated alcohols (ethanol and n-propanol) at 294 K. Phys Chem Chem Phys 2018; 20:27885-27896. [DOI: 10.1039/c8cp05411h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water accelerates the title reaction by lowering the energy barrier and increasing the dipole moments of the reactants.
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Affiliation(s)
- Rafael A. Jara-Toro
- INFIQC (CONICET – UNC) – Ciudad Universitaria
- X5000HUA Córdoba
- Argentina
- Dpto. de Fisicoquímica – Facultad de Ciencias Químicas – Universidad Nacional de Córdoba – Ciudad Universitaria
- X5000HUA Córdoba
| | - Federico J. Hernández
- INFIQC (CONICET – UNC) – Ciudad Universitaria
- X5000HUA Córdoba
- Argentina
- Dpto. de Fisicoquímica – Facultad de Ciencias Químicas – Universidad Nacional de Córdoba – Ciudad Universitaria
- X5000HUA Córdoba
| | - María de los A. Garavagno
- INFIQC (CONICET – UNC) – Ciudad Universitaria
- X5000HUA Córdoba
- Argentina
- Dpto. de Fisicoquímica – Facultad de Ciencias Químicas – Universidad Nacional de Córdoba – Ciudad Universitaria
- X5000HUA Córdoba
| | - Raúl A. Taccone
- INFIQC (CONICET – UNC) – Ciudad Universitaria
- X5000HUA Córdoba
- Argentina
- Dpto. de Fisicoquímica – Facultad de Ciencias Químicas – Universidad Nacional de Córdoba – Ciudad Universitaria
- X5000HUA Córdoba
| | - Gustavo A. Pino
- INFIQC (CONICET – UNC) – Ciudad Universitaria
- X5000HUA Córdoba
- Argentina
- Dpto. de Fisicoquímica – Facultad de Ciencias Químicas – Universidad Nacional de Córdoba – Ciudad Universitaria
- X5000HUA Córdoba
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12
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Brice JT, Franke PR, Douberly GE. Sequential Capture of O(3P) and HCN by Helium Nanodroplets: Infrared Spectroscopy and ab Initio Computations of the 3Σ O–HCN Complex. J Phys Chem A 2017; 121:9466-9473. [DOI: 10.1021/acs.jpca.7b10174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph T. Brice
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
| | - Peter R. Franke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gary E. Douberly
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
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13
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Brown AR, Franke PR, Douberly GE. Helium Nanodroplet Isolation of the Cyclobutyl, 1-Methylallyl, and Allylcarbinyl Radicals: Infrared Spectroscopy and Ab Initio Computations. J Phys Chem A 2017; 121:7576-7587. [DOI: 10.1021/acs.jpca.7b07852] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alaina R. Brown
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
| | - Peter R. Franke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gary E. Douberly
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
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14
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Raston PL, Obi EI, Douberly GE. Infrared Spectroscopy of the Entrance Channel Complex Formed Between the Hydroxyl Radical and Methane in Helium Nanodroplets. J Phys Chem A 2017; 121:7597-7602. [DOI: 10.1021/acs.jpca.7b07906] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paul L. Raston
- Department
of Chemistry and Biochemistry, James Madison University, Harrisonburg, Virginia 22807, United States
| | - Emmanuel I. Obi
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Gary E. Douberly
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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15
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Gao A, Li G, Peng B, Xie Y, Schaefer HF. The water dimer reaction OH + (H 2O) 2 → (H 2O)-OH + H 2O. Phys Chem Chem Phys 2017; 19:18279-18287. [PMID: 28678244 DOI: 10.1039/c7cp03233a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stationary points, including the entrance complex, transition states, and the exit complex, for the reaction OH + (H2O)2 → (H2O)OH + H2O have been carefully examined using the "gold standard" CCSD(T) method with the correlation-consistent basis sets up to cc-pVQZ. The complex (H2O)2OH is found to lie 10.8 kcal mol-1 below the separated reactants. This complex should be observable in the gas phase via vibrational or microwave spectroscopy. Seven unique transition states were found. One pathway for the title reaction has no barrier, in which the OH radical captures a whole water molecule from the water dimer. For the hydrogen abstraction pathways the lowest classical barrier height is predicted to be 5.9 kcal mol-1 (TS1) relative to separated reactants, and the other pathways are of higher barriers, i.e., 17.8 (TS2) and 18.4 (TS3) kcal mol-1. The harmonic vibrational frequencies and the zero-point vibrational energies of the stationary points for the reaction are also reported.
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Affiliation(s)
- Aifang Gao
- School of Water Resources and Environment, Hebei GEO University, Shijiazhuang, 050031, China.
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16
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Jara-Toro RA, Hernández FJ, Taccone RA, Lane SI, Pino GA. Water Catalysis of the Reaction between Methanol and OH at 294 K and the Atmospheric Implications. Angew Chem Int Ed Engl 2017; 56:2166-2170. [DOI: 10.1002/anie.201612151] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Rafael A. Jara-Toro
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Federico J. Hernández
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Raúl A. Taccone
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Silvia I. Lane
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Gustavo A. Pino
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
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17
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Jara-Toro RA, Hernández FJ, Taccone RA, Lane SI, Pino GA. Water Catalysis of the Reaction between Methanol and OH at 294 K and the Atmospheric Implications. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612151] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Rafael A. Jara-Toro
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Federico J. Hernández
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Raúl A. Taccone
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Silvia I. Lane
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Gustavo A. Pino
- INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-; Facultad de Ciencias Químicas-; Centro Láser de Ciencias Moleculares-; Universidad Nacional de Córdoba; Ciudad Universitaria X5000HUA Córdoba Argentina
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18
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Bai M, Lu D, Li J. Quasi-classical trajectory studies on the full-dimensional accurate potential energy surface for the OH + H2O = H2O + OH reaction. Phys Chem Chem Phys 2017; 19:17718-17725. [DOI: 10.1039/c7cp02656k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first accurate PES for the OH + H2O reaction is developed by using the permutation invariant polynomial-neural network method to fit ∼48 000 CCSD(T)-F12a/AVTZ calculated points.
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Affiliation(s)
- Mengna Bai
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 401331
- China
| | - Dandan Lu
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 401331
- China
| | - Jun Li
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 401331
- China
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19
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Carpenter BK, Harvey JN, Orr-Ewing AJ. The Study of Reactive Intermediates in Condensed Phases. J Am Chem Soc 2016; 138:4695-705. [DOI: 10.1021/jacs.6b01761] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Barry K. Carpenter
- School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K
| | - Jeremy N. Harvey
- Department
of Chemistry, KU Leuven, Celestijnen Laan 200F, B-3001 Heverlee, Belgium
| | - Andrew J. Orr-Ewing
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
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20
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Cheng X, Herr JD, Steele RP. Accelerating Ab Initio Path Integral Simulations via Imaginary Multiple-Timestepping. J Chem Theory Comput 2016; 12:1627-38. [DOI: 10.1021/acs.jctc.6b00021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaolu Cheng
- Department of Chemistry and 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 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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