51
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Thomas AM, Dangi BB, Yang T, Kaiser RI, Sun BJ, Chou TJ, Chang AH. A crossed molecular beams investigation of the reactions of atomic silicon (Si(3P)) with C4H6 isomers (1,3-butadiene, 1,2-butadiene, and 1-butyne). Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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52
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Mondal S, Liu K. Effects of Stretching Excitations in Cl + CH3D(v4, v1-I, v1-II = 1): As the Cl Atom Attacks the Unexcited C–D Bond. J Phys Chem A 2019; 123:1514-1520. [DOI: 10.1021/acs.jpca.8b11702] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sohidul Mondal
- Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10699
| | - Kopin Liu
- Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10699
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan 80424
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53
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Caracciolo A, Vanuzzo G, Balucani N, Stranges D, Tanteri S, Cavallotti C, Casavecchia P. Crossed molecular beams and theoretical studies of the O(3P)+ 1,2-butadiene reaction: Dominant formation of propene+CO and ethylidene+ketene molecular channels. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1812281] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Adriana Caracciolo
- Dipartimento di Chimica Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia 06123, Italy
| | - Gianmarco Vanuzzo
- Dipartimento di Chimica Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia 06123, Italy
| | - Nadia Balucani
- Dipartimento di Chimica Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia 06123, Italy
| | - Domenico Stranges
- Dipartimento di Chimica, Università degli Studi La Sapienza, Roma 00185, Italy
| | - Silvia Tanteri
- Dipartimento di Chimica, Università degli Studi La Sapienza, Roma 00185, Italy
| | - Carlo Cavallotti
- Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Milano 20131, Italy
| | - Piergiorgio Casavecchia
- Dipartimento di Chimica Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia 06123, Italy
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54
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Affiliation(s)
- Kopin Liu
- Institution of Atomic and Molecular Sciences (IAMS), Academic Sinica, Taipei 10699
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55
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Lu DD, Xie CJ, Li J, Guo H. Rate coefficients and branching ratio for multi-channel hydrogen abstractions from CH3OH by F. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1811256] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Dan-dan Lu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331,
China
| | - Chang-jian Xie
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131,
USA
| | - 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,
USA
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56
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Li H, Kamasah A, Suits AG. Imaging H abstraction dynamics in crossed molecular beams: O(3P) + propanol isomers. Phys Chem Chem Phys 2019; 21:14186-14194. [DOI: 10.1039/c8cp06351f] [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
Direct rebound dynamics are revealed for bimolecular reaction of the ground state O(3P) atom with propanol isomers, involving the post transition state long-range dipole–dipole interaction between the dipolar OH and hydroxypropyl radicals.
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Affiliation(s)
- Hongwei Li
- Department of Chemistry
- University of Missouri Columbia
- MO 65211
- USA
| | | | - Arthur G. Suits
- Department of Chemistry
- University of Missouri Columbia
- MO 65211
- USA
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57
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Vallance C. Multi-mass velocity-map imaging studies of photoinduced and electron-induced chemistry. Chem Commun (Camb) 2019; 55:6336-6352. [PMID: 31099379 DOI: 10.1039/c9cc02426c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multi-mass velocity-map imaging (VMI) is becoming established as a promising method for probing the dynamics of a variety of gas-phase chemical processes. We provide an overview of velocity-map imaging and multi-mass velocity-map imaging techniques, highlighting examples in which these approaches have been used to provide mechanistic insights into a range of photoinduced and electron-induced chemical processes. Multi-mass detection capabilities have also led to the development of two new tools for the chemical dynamics toolbox, in the form of Coulomb-explosion imaging and covariance-map imaging. These allow details of molecular structure to be followed in real time over the course of a chemical reaction, offering the tantalising prospect of recording real-time 'molecular movies' of chemical dynamics. As these new methods become established within the reaction dynamics community, they promise new mechanistic insights into chemistry relevant to fields ranging from atmospheric chemistry and astrochemistry through to synthetic organic photochemistry and biology.
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Affiliation(s)
- Claire Vallance
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Rd, Oxford OX1 3TA, UK.
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58
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Coutinho ND, Sanches-Neto FO, Carvalho-Silva VH, de Oliveira HCB, Ribeiro LA, Aquilanti V. Kinetics of the OH+HCl→H 2 O+Cl reaction: Rate determining roles of stereodynamics and roaming and of quantum tunneling. J Comput Chem 2018; 39:2508-2516. [PMID: 30365178 DOI: 10.1002/jcc.25597] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 08/15/2018] [Accepted: 08/20/2018] [Indexed: 02/03/2023]
Abstract
The OH + HCl → H2 O + Cl reaction is one of the most studied four-body systems, extensively investigated by both experimental and theoretical approaches. Here, as a continuation of our previous work on the OH + HBr and OH + HI reactions, which manifest an anti-Arrhenius behavior that was explained by stereodynamic and roaming effects, we extend the strategy to understand the transition to the sub-Arrhenius behavior occurring for the HCl case. As previously, we perform first-principles on-the-fly Born-Oppenheimer molecular dynamics calculations, thermalized at four temperatures (50, 200, 350, and 500 K), but this time we also apply a high-level transition-state-theory, modified to account for tunneling conditions. We find that the theoretical rate constants calculated with Bell tunneling corrections are in good agreement with extensive experimental data available for this reaction in the ample temperature range: (i) simulations show that the roles of molecular orientation in promoting this reaction and of roaming in finding the favorable path are minor than in the HBr and HI cases, and (ii) dominating is the effect of quantum mechanical penetration through the energy barrier along the reaction path on the potential energy surface. The discussion of these results provides clarification of the origin on different non-Arrhenius mechanisms observed along this series of reactions. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Nayara D Coutinho
- Instituto de Química, Universidade de Brasília, Caixa Postal 4478, 70904-970, Brasília, Brazil
| | - Flavio O Sanches-Neto
- Grupo de Química Teórica e Estrutural de Anápolis, Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás, CP 459, 75001-970, Anápolis, GO, Brazil
| | | | - Heibbe C B de Oliveira
- Instituto de Química, Universidade de Brasília, Caixa Postal 4478, 70904-970, Brasília, Brazil
| | - Luiz A Ribeiro
- Institute of Physics, University of Brasilia, Brasilia, 70910-900, Brazil
| | - Vincenzo Aquilanti
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy.,Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Area dela Ricerca di Roma Tor Vergata, Via del Fosso del Cavaliere, 00133, Rome, Italy
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59
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Anggara K, Leung L, Timm MJ, Hu Z, Polanyi JC. Approaching the forbidden fruit of reaction dynamics: Aiming reagent at selected impact parameters. SCIENCE ADVANCES 2018; 4:eaau2821. [PMID: 30310869 PMCID: PMC6173530 DOI: 10.1126/sciadv.aau2821] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
Collision geometry is central to reaction dynamics. An important variable in collision geometry is the miss-distance between molecules, known as the "impact parameter." This is averaged in gas-phase molecular beam studies. By aligning molecules on a surface prior to electron-induced dissociation, we select impact parameters in subsequent inelastic collisions. Surface-collimated "projectile" molecules, difluorocarbene (CF2), were aimed at stationary "target" molecules characterized by scanning tunneling microscopy (STM), with the observed scattering interpreted by computational molecular dynamics. Selection of impact parameters showed that head-on collisions favored bimolecular reaction, whereas glancing collisions led only to momentum transfer. These collimated projectiles could be aimed at the wide variety of adsorbed targets identifiable by STM, with the selected impact parameter assisting in the identification of the collision geometry required for reaction.
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60
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Ping L, Tian L, Song H, Yang M. New Method To Extract Final-State Information of Polyatomic Reactions Based on Normal Mode Analysis. J Phys Chem A 2018; 122:6997-7005. [PMID: 30107119 DOI: 10.1021/acs.jpca.8b06662] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
State-to-state reaction dynamics provides a comprehensive insight into reaction mechanisms of chemical reactions at the atomic level. A new scheme to extract final-state information based on normal mode analysis is proposed in this work. Different from the traditional scheme extracting the coordinates and momenta from the last step of each trajectory, they are taken in the new scheme from a specific step of each reactive trajectory within the last vibrational period of the product molecule by demanding the corresponding geometry of the step to have the minimum potential energy. Test calculations on the collisions between the atom H and the molecules H2O, H2S, and NH3 show that the new scheme works much better than the traditional one. In addition, the new scheme is applied to calculate the vibrational state distribution of the product NH2 in the reaction H + NH3 → H2 + NH2.
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Affiliation(s)
- Leilei Ping
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics , Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071 , China.,College of Physical Science and Technology , Huazhong Normal University , Wuhan 430079 , China
| | - Li Tian
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics , Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071 , China.,College of Physical Science and Technology , Huazhong Normal University , Wuhan 430079 , China
| | - Hongwei Song
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics , Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071 , China
| | - Minghui Yang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics , Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071 , China
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61
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Pan H, Tkac O, Liu K. Rotational-mode specific effects on the stereo-requirement in the reaction of prealigned-CHD3(v1 = 1; |JK = |10 or |1 ± 1) with the chlorine atom. J Chem Phys 2018; 148:244307. [DOI: 10.1063/1.5037892] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Huilin Pan
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10617, Taiwan
| | - Ondrej Tkac
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10617, Taiwan
| | - Kopin Liu
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10617, Taiwan
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
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62
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Fu B, Zhang DH. Ab Initio Potential Energy Surfaces and Quantum Dynamics for Polyatomic Bimolecular Reactions. J Chem Theory Comput 2018; 14:2289-2303. [DOI: 10.1021/acs.jctc.8b00006] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bina Fu
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Dong H. Zhang
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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63
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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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