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Zhang Y, Xu J. An analytic global potential energy surface of the CsH 2 system and the dynamic calculations of the H + CsH reaction. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2151524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Yong Zhang
- NEST Lab, Department of Chemistry, Department of Physics, College of Science, Shanghai University, Shanghai, People’s Republic of China
- Department of Physics, Tonghua Normal University, Tonghua, People’s Republic of China
| | - Jiaqiang Xu
- NEST Lab, Department of Chemistry, Department of Physics, College of Science, Shanghai University, Shanghai, People’s Republic of China
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Zhang Y, Xu J, Yang H, Xu J. The global potential energy surface of the RbH2 system and dynamics studies of the H + RbH → Rb + H2 reaction. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Li W, Wang X, Zhao H, He D. Non-adiabatic dynamics studies of the K(4p 2P) + H 2(X 1Σ) reaction based on new diabatic potential energy surfaces. Phys Chem Chem Phys 2020; 22:16203-16214. [PMID: 32643736 DOI: 10.1039/d0cp02859b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Global diabatic potential energy surfaces (PESs) of the KH2 system corresponding to the ground (12A') and first excited (22A') states were constructed for the first time. In ab initio calculations, the MRCI-F12 method with AVTZ and def2-QZVP basis sets was adopted and 17 865 ab initio energy points were calculated. The mixing angle, which is used to obtain the diabatic energies, was calculated by the molecular properties of the transition dipole moment. The diabatic PESs were fitted individually by the permutation invariant polynomial neural network method and the topographical features of the diabatic PESs are discussed in detail. The non-adiabatic dynamics studies of the K(4p2P) + H2(v0 = 0, 1, j0 = 0) reaction were carried out using the APH method based on the new diabatic PESs. The collision reaction processes K(4p2P) + H2(v0 = 0, 1, j0 = 0) → H + KH and the quenching processes K(4p2P) + H2(v0 = 0, 1, j0 = 0) → K(4s2S) + H2 were studied at the state-to-state level of theory. For the reaction process, the dynamics results indicated that the vibrational excitation of H2 was significantly more effective at promoting the reaction than the translational energy. In addition, the differential cross-sections were forward-biased scattering, which indicated that the direct abstraction mechanism plays a dominant role in the reaction. For the quenching process, the vibrational excitation of H2 molecules could improve the quenching efficiency obviously.
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Affiliation(s)
- Wentao Li
- Center for Theoretical and Computational Chemistry and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Xuemei Wang
- Weifang University of Science and Technology, Shouguang 262700, China
| | - Hailin Zhao
- Center for Theoretical and Computational Chemistry and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Di He
- School of Physics and Optoelectronics Engineering, Ludong University, Yantai 264025, China
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Yuan J, Duan Z, Wang S, Liu J, Han K. Significant effects of vibrational excitation of reactant in K + H 2 → H + KH reaction based on a new neural network potential energy surface. Phys Chem Chem Phys 2018; 20:20641-20649. [PMID: 30059113 DOI: 10.1039/c8cp03310b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The study of K + H2 collision has a long experimental history, but there have been few theoretical studies due to lack of a global potential energy surface (PES). In this study, a new global PES for the ground state of KH2 system was constructed based on numerous ab initio points, using the permutation invariant polynomial neural network method. The root mean square error (RMSE) of PES is very small (5.64 meV). On the new PES, time-dependent quantum wave packet (TDWP) and quasiclassical trajectory (QCT) calculations were carried out to study the dynamics of the K(2S) + H2(X1Σ+g) → H(2S) + KH(X1Σ+) reaction. Dynamics results show that (i) the K + H2(v = 0) → H + KH reaction scarcely occurred, (ii) the K + H2(v = 1) → H + KH reaction took place in small quantities, and (iii) the K + H2(v = 2) → H + KH reaction occurred in large quantities. This indicates that vibrational energy of the reactant is significantly more effective at promoting the reaction than the translational energy. This characteristic stems from a major physical model in reactive collisions: the vibrationally excited H2 molecule and K atom collide first in a T-geometric configuration and the vibrational motion of the H2 molecule helps separate the two H atoms a large distance after the collision. At a large H-H distance, a broad well exists on the PES, so the heavy K atom could pull back the light H atom to initiate the reaction. Similar to the reactive channel, vibrational excitation of the reactant also has a significant effect on the collision-induced dissociation channel.
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Affiliation(s)
- Jiuchuang Yuan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China.
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Liu DK, Lin KC. Nascent Rotational Distributions of MgH in Reaction of Mg(4s1S0) with H2and HD. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.199700071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hsiao MK, Lin KC, Hung YM. Quasiclassical trajectory calculations for Li(22PJ) + H2 → LiH(X1Σ+) + H: Influence by vibrational excitation and translational energy. J Chem Phys 2011; 134:034119. [DOI: 10.1063/1.3519801] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chang YP, Hsiao MK, Liu DK, Lin KC. Rotational and vibrational state distributions of NaH in the reactions of Na(4S2,3D2,and6S2) with H2: Insertion versus harpoon-type mechanisms. J Chem Phys 2008; 128:234309. [DOI: 10.1063/1.2939570] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
The direct collisional energy transfer processes of the excited states of Li(4p) by several gases are investigated under gas cell conditions. The nonreactive absorption profiles of the collision complex are monitored as a function of laser detuning from the Li(2s-4p) resonances. Pronounced structures in the absorption spectra along with high level ab initio calculations of the relevant potential energy surfaces are used to understand the experimental results.
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Affiliation(s)
- Brian C Hattaway
- Department of Physics, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA
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Chen JJ, Hung YM, Liu DK, Fung HS, Lin KC. Reaction pathway, energy barrier, and rotational state distribution for Li (2 2PJ)+H2→LiH (X 1Σ+)+H. J Chem Phys 2001. [DOI: 10.1063/1.1370070] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Hsiao YC, Liu DK, Fung HS, Lin KC. Temperature effect on the deactivation of electronically excited potassium by hydrogen molecule. J Chem Phys 2000. [DOI: 10.1063/1.1288787] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Affiliation(s)
- Li-Hsyan Fan
- Department of Chemistry, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 402, Taiwan, Republic of China
| | - Jye-Jong Chen
- Department of Chemistry, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 402, Taiwan, Republic of China
| | - Yann-Yow Lin
- Department of Chemistry, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 402, Taiwan, Republic of China
| | - Wei-Tzou Luh
- Department of Chemistry, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 402, Taiwan, Republic of China
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Liu DK, Lin KC. State-specific reaction and product energy disposal of electronically excited potassium with hydrogen molecule. J Chem Phys 1997. [DOI: 10.1063/1.474799] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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Liu D, Lin K. Rotational population distribution of KH (v=0, 1, 2, and 3) in the reaction of K(5 2PJ, 6 2PJ, and 7 2PJ) with H2: Reaction mechanism and product energy disposal. J Chem Phys 1996. [DOI: 10.1063/1.472746] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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