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Ma D, Ma J. Full-dimensional quantum mechanical calculations for the tunneling behavior of HOCO dissociation to H + CO 2. Phys Chem Chem Phys 2022; 24:15321-15329. [PMID: 35703166 DOI: 10.1039/d1cp04269f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tunneling behavior during HOCO dissociation to H + CO2 was investigated by full-dimensional quantum mechanical calculations based on an accurate global potential energy surface. The tunneling lifetimes for the low-lying 1500 vibrational states were calculated using the low-storage filter diagonalization method after a 1 million-step Chebyshev propagation. In the calculated energy range, the lifetimes of different vibrational states with similar energy are found to differ by 3-4 orders of magnitude, and the lower limit for these tunneling lifetimes is consistent with the experimental results reported by Continetti et al. For the given vibrational progressions, the lifetime of the vibrational states decreases with the increasing energy level, which is consistent with the results of 1D simulation calculations reported by Bowman, but the declining curve obviously fluctuates, and the declining slope is significantly different from that obtained by 1D simulation. Due to a difference in the effective barrier width, the mode-specific behavior of the tunneling effect is manifested in that the O-C-O' and H-O-C bend modes lead to the largest enhancement and an inhibitory effect on the tunneling process, respectively.
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Affiliation(s)
- Dandan Ma
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Jianyi Ma
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan, 610065, China.
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2
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Abstract
Machine learning (ML) techniques applied to chemical reactions have a long history. The present contribution discusses applications ranging from small molecule reaction dynamics to computational platforms for reaction planning. ML-based techniques can be particularly relevant for problems involving both computation and experiments. For one, Bayesian inference is a powerful approach to develop models consistent with knowledge from experiments. Second, ML-based methods can also be used to handle problems that are formally intractable using conventional approaches, such as exhaustive characterization of state-to-state information in reactive collisions. Finally, the explicit simulation of reactive networks as they occur in combustion has become possible using machine-learned neural network potentials. This review provides an overview of the questions that can and have been addressed using machine learning techniques, and an outlook discusses challenges in this diverse and stimulating field. It is concluded that ML applied to chemistry problems as practiced and conceived today has the potential to transform the way with which the field approaches problems involving chemical reactions, in both research and academic teaching.
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Affiliation(s)
- Markus Meuwly
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland.,Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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3
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Barker JR, Stanton JF, Nguyen TL. Semiclassical transition state theory/master equation kinetics of HO + CO: Performance evaluation. INT J CHEM KINET 2020. [DOI: 10.1002/kin.21420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- John R. Barker
- Climate and Space Sciences & Engineering University of Michigan Ann Arbor Michigan
| | - John F. Stanton
- Quantum Theory Project Department of Chemistry University of Florida Gainesville Florida
| | - Thanh Lam Nguyen
- Quantum Theory Project Department of Chemistry University of Florida Gainesville Florida
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4
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Caracciolo A, Lu D, Balucani N, Vanuzzo G, Stranges D, Wang X, Li J, Guo H, Casavecchia P. Combined Experimental-Theoretical Study of the OH + CO → H + CO 2 Reaction Dynamics. J Phys Chem Lett 2018; 9:1229-1236. [PMID: 29470075 DOI: 10.1021/acs.jpclett.7b03439] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A combined experimental-theoretical study is performed to advance our understanding of the dynamics of the prototypical tetra-atom, complex-forming reaction OH + CO → H + CO2, which is also of great practical relevance in combustion, Earth's atmosphere, and, potentially, Mars's atmosphere and interstellar chemistry. New crossed molecular beam experiments with mass spectrometric detection are analyzed together with the results from previous experiments and compared with quasi-classical trajectory (QCT) calculations on a new, full-dimensional potential energy surface (PES). Comparisons between experiment and theory are carried out both in the center-of-mass and laboratory frames. Good agreement is found between experiment and theory, both for product angular and translational energy distributions, leading to the conclusion that the new PES is the most accurate at present in elucidating the dynamics of this fundamental reaction. Yet, small deviations between experiment and theory remain and are presumably attributable to the QCT treatment of the scattering dynamics.
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Affiliation(s)
- Adriana Caracciolo
- Dipartimento di Chimica, Biologia e Biotecnologie , Università degli Studi di Perugia , 06123 Perugia , Italy
| | - Dandan Lu
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 401331 , China
| | - Nadia Balucani
- Dipartimento di Chimica, Biologia e Biotecnologie , Università degli Studi di Perugia , 06123 Perugia , Italy
| | - Gianmarco Vanuzzo
- Dipartimento di Chimica, Biologia e Biotecnologie , Università degli Studi di Perugia , 06123 Perugia , Italy
| | - Domenico Stranges
- Dipartimento di Chimica , Sapienza - Università di Roma , 00185 Roma , Italy
| | - Xingan Wang
- Department of Chemical Physics, School of Chemistry and Materials Science , University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Jun Li
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 401331 , China
| | - Hua Guo
- Department of Chemistry and Chemical Biology , University of New Mexico , Albuquerque , New Mexico 87131 , United States
| | - Piergiorgio Casavecchia
- Dipartimento di Chimica, Biologia e Biotecnologie , Università degli Studi di Perugia , 06123 Perugia , Italy
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5
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Abstract
Recent experimental and theoretical advances in transient reaction dynamics probed by photodetachment of polyatomic anions are reviewed.
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Affiliation(s)
- Robert E. Continetti
- Department of Chemistry and Biochemistry
- University of California San Diego
- La Jolla
- USA
| | - Hua Guo
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
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6
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Fang Y, Liu F, Barber VP, Klippenstein SJ, McCoy AB, Lester MI. Deep tunneling in the unimolecular decay of CH3CHOO Criegee intermediates to OH radical products. J Chem Phys 2016; 145:234308. [DOI: 10.1063/1.4972015] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yi Fang
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Fang Liu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Victoria P. Barber
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Stephen J. Klippenstein
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Anne B. McCoy
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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7
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Jiang B, Li J, Guo H. Potential energy surfaces from high fidelity fitting ofab initiopoints: the permutation invariant polynomial - neural network approach. INT REV PHYS CHEM 2016. [DOI: 10.1080/0144235x.2016.1200347] [Citation(s) in RCA: 210] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Stanton JF. Semiclassical Transition-State Theory Based on Fourth-Order Vibrational Perturbation Theory: The Symmetrical Eckart Barrier. J Phys Chem Lett 2016; 7:2708-2713. [PMID: 27358083 DOI: 10.1021/acs.jpclett.6b01239] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Semiclassical transition-state theory based on fourth-order vibrational perturbation theory (VPT4-SCTST) is applied to compute the barrier transmission coefficient for the symmetric Eckart potential. For a barrier parametrized to mimic the H2 + H exchange reaction, the results obtained are in excellent agreement with exact quantum calculations over a range of energy that extends down to roughly 1% of the barrier height, V0, where tunneling is negligible. The VPT2-SCTST treatment, which is commonly used in chemical kinetics studies, also performs quite well but already shows an error of a few percent at ca. 0.8 V0 where tunneling is still important. This suggests that VPT4-SCTST could offer an improvement over VPT2-SCTST in applications studies. However, the computational effort for VPT4-SCTST treatments of molecules is excessive, and any improvement gained is unlikely to warrant the increased effort. Nevertheless, the treatment of the symmetric Eckart barrier problem here suggests a simple modification of the usual VPT2-SCTST protocol that warrants further investigation.
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Affiliation(s)
- John F Stanton
- Institute for Theoretical Chemistry, Department of Chemistry and Biochemistry, The University of Texas at Austin , Austin, Texas 78712, United States
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9
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Vereecken L, Glowacki DR, Pilling MJ. Theoretical Chemical Kinetics in Tropospheric Chemistry: Methodologies and Applications. Chem Rev 2015; 115:4063-114. [DOI: 10.1021/cr500488p] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Luc Vereecken
- Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - David R. Glowacki
- PULSE
Institute and Department of Chemistry, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department
of Computer Science, University of Bristol, Bristol BS8 1UB, United Kingdom
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10
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Zou L, Li J, Wang H, Ma J, Guo H. State-Resolved Quantum Dynamics of Photodetachment of HCO2−/DCO2− on an Accurate Global Potential Energy Surface. J Phys Chem A 2015; 119:7316-24. [DOI: 10.1021/jp512557k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lindong Zou
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jun Li
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Hui Wang
- National
Key Laboratory for Reactor Fuel and Materials, Nuclear Power Institute of China, Chengdu, Sichuan 610041, China
| | - Jianyi Ma
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Hua Guo
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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11
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Johnson CJ, Otto R, Continetti RE. Spectroscopy and dynamics of the HOCO radical: insights into the OH + CO → H + CO2 reaction. Phys Chem Chem Phys 2014; 16:19091-105. [DOI: 10.1039/c4cp02593h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron–photofragment coincidence experiments coupled with quantum chemistry and dynamics calculations have significantly enhanced our understanding of the reactive intermediate HOCO.
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Affiliation(s)
| | - Rico Otto
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla, USA
| | - Robert E. Continetti
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla, USA
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