1
|
Chang H, Li W, Sun Z. New Diabatic Potential Energy Surfaces for the Li + H 2 Reaction and Time-Dependent Quantum Wave Packet Studies. J Phys Chem A 2024; 128:4412-4424. [PMID: 38787593 DOI: 10.1021/acs.jpca.4c00539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
New global diabatic potential energy surfaces (DPESs) for the ground (12A') and first excited (22A') states for the Li + H2 system were developed, with more than 30,000 energy points at the IC-MRCI+Q level of theory, utilizing the aug-cc-pV5Z basis set for the H atoms and the cc-pCV5Z basis set for the Li atom, fitted by a single neural network (NN) with symmetry. Product state-resolved quantum dynamics calculations of the nonadiabatic reaction Li (2P) + H2 (X 1 ∑g+, v0 = 0, j0 = 0) → LiH (X 1∑+) + H(2S) were carried out using these new DPESs and also the previous HYLC-DPESs. The numerical results suggested that our newly constructed DPESs provided an accurate description of the LiH2 system.
Collapse
Affiliation(s)
- Hanwen Chang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wentao Li
- Weifang University of Science and Technology, Shouguang 262700, China
| | - Zhigang Sun
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| |
Collapse
|
2
|
Ladjimi H, Bejaoui M, Zrafi W, Berriche H. Potential Energy Surfaces and Arrangement Effects of RbNa 2 Complex. J Phys Chem A 2023; 127:6677-6686. [PMID: 37552554 DOI: 10.1021/acs.jpca.3c01283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Ab initio calculations of alkaline diatomic molecule interactions with alkaline atoms provide detailed information about their electronic structure, vibrational frequencies, and spectroscopic properties, which are difficult to measure experimentally. This knowledge can aid in designing and interpreting experiments and guide the development of computational models and advanced dynamical calculation. Using the quantum chemistry ab initio methods based on multi-reference configuration interaction with Davidson correction (MCSCF/MRCI + Q), atomic effective core potentials, core-polarization potentials, and the interactions between the sodium atom and the NaRb diatomic molecule are investigated. To describe the potential energy surfaces of the RbNa2 system, we introduce two geometries described in the Z-matrix coordinates (Re, R, θ). Potential energy surfaces of the ground state 12A' and the first excited state 22A' were calculated for different approach directions of the sodium atom to the NaRb molecule and two geometries were considered. The first geometry is where the Na atom approaches the Rb atom of the RbNa dimer, and the second one is when it approaches the Na atom of the RbNa dimer. Global minima of the ground and first excited states and conical intersections between these states are determined for both geometries. The RbNa dimer in interaction with the sodium atom is found to be strongly attractive in its first excited state, which may be important for the experimenters particularly in the field of cold alkali polar dimers. Thereafter, the potential energy curves correlated to the lowest-lying dissociation limits are calculated in the linear form for the two geometrical cases (angle θ at 180°) and the atomic arrangement effect is observed.
Collapse
Affiliation(s)
- Hela Ladjimi
- Laboratory of Interfaces and Advanced Materials, Faculty of Science, University of Monastir, Monastir 5019, Tunisia
| | - Mohamed Bejaoui
- Laboratory of Interfaces and Advanced Materials, Faculty of Science, University of Monastir, Monastir 5019, Tunisia
| | - Wissem Zrafi
- Laboratory of Interfaces and Advanced Materials, Faculty of Science, University of Monastir, Monastir 5019, Tunisia
| | - Hamid Berriche
- Laboratory of Interfaces and Advanced Materials, Faculty of Science, University of Monastir, Monastir 5019, Tunisia
- Department of Mathematics and Natural Sciences, School of Arts and Sciences, American University of Ras Al Khaimah, Ras Al Khaimah, P.O. Box 10021, United Arab Emirates
| |
Collapse
|
3
|
Sahoo J, Rawat AMS, Mahapatra S. Quantum interference in the mechanism of H + LiH + → H 2 + Li + reaction dynamics. Phys Chem Chem Phys 2021; 23:27327-27339. [PMID: 34853838 DOI: 10.1039/d1cp04120g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, the detailed reaction mechanism of the astrochemically relevant exoergic and barrierless H + LiH+ → H2 + Li+ reaction is investigated by both time-dependent wave packet and quasi-classical trajectory (QCT) methods on the ab initio electronic ground state potential energy surface reported by Martinazzo et al. [Martinazzo et al., J. Chem. Phys., 2003, 119, 11241]. The interference terms due to the coherence between the partial waves are quantified. When plotted along the scattering angle they reveal interference of constructive or destructive nature. Significant interference was found in the differential cross-section (DCS) which is a symbolic of the non-statistical nature of the reaction. This is further complemented by calculating the lifetime of the collision complex by the QCT method. It is found that the reaction follows a direct stripping mechanism at higher collision energies and yields forward scattered products from collisions involving high total angular momentum. At low collision energies, the reaction follows a mixed direct/indirect mechanism but with a dominant indirect contribution. The product state-resolved DCSs reveal that two opposite mechanisms co-exist, both at low and high collision energies. The microscopic scattering mechanism of the reaction is found to be unaffected by the ro-vibrational excitation of the reagent diatom.
Collapse
Affiliation(s)
- Jayakrushna Sahoo
- School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India.
| | | | - S Mahapatra
- School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India.
| |
Collapse
|
4
|
He D, Li W, Wang M. A study on the non-adiabatic dynamics of the Li(2p) + H2 → Li(2 s) + H2 quenching reaction calculated by time-dependent wavepacket method. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Sahoo J, Rawat AMS, Mahapatra S. Theoretical Study of the Energy Disposal Mechanism and the State-Resolved Quantum Dynamics of the H + LiH + → H 2 + Li + Reaction. J Phys Chem A 2021; 125:3387-3397. [PMID: 33876630 DOI: 10.1021/acs.jpca.1c01811] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite several studies in the literature, the detailed quantum state-to-state level mechanism of the astrophysically important exoergic barrierless H + LiH+ → H2 + Li+ reaction is yet to be understood. In this work, we have investigated the energy disposal mechanism of the reaction in terms of integral reaction cross section, product internal state distributions, differential cross section, and rate constant. Fully converged and Coriolis coupled quantum mechanical calculations based on a time-dependent wave packet method have been performed at the state-to-state level on the ab initio electronic ground state potential energy surface (PES) constructed by Martinazzo et al. (J. Chem. Phys. 2003, 119, 11241-11248). The agreement between the present quantum mechanical and previous quasi-classical results is found even at very low relative translational energies of reagents. A non-statistical inverse Boltzmann vibrational distribution for the product is found. This is attributed to the "attractive" nature of the underlying PES, which facilitates the excess energy release mostly as product vibration (60-80%). The energy disposal in products is found to be unaffected by the rovibrational excitation of the reagent diatom due to the weak coupling between the vibrational modes of the reagent and the product. The mild effect of collision energy on the product energy disposal is ascribed to the effective coupling between the translational modes of the reagent and the product. It is found that the collisions lead to the formation of the product H2 in its rovibrationally excited levels.
Collapse
Affiliation(s)
- Jayakrushna Sahoo
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | | | - S Mahapatra
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| |
Collapse
|
6
|
Li W, Sun J, He D. Non-adiabatic dynamics studies of the H( 2S) + LiH(X 1Σ +) reaction by time-dependent wave packet method. Phys Chem Chem Phys 2020; 22:17587-17596. [PMID: 32716453 DOI: 10.1039/d0cp01803a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-adiabatic dynamics studies of the H + LiH (v0 = 0, j0 = 0) reaction are carried out based on the diabatic potential energy surfaces (PESs) reported by He and co-workers (Sci. Rep., 2016, 6, 25083) in the collision energy range from 0.001 to 1.0 eV. The H(2S) + LiH(X1Σ+) → Li(22S)/Li(22P) + H2(X1Σg+) depletion reactions and the H'(2S) + LiH(X1Σ+) → H(2S) + LiH'(X1Σ+) exchange reaction are studied at the state-to-state level of theory. The dynamics properties, such as reaction probability, integral cross section, differential cross section, the ro-vibrational state distributions of the product and specific-state rate constant are calculated. In addition, the dynamics values of the H(2S) + LiH(X1Σ+) → Li(22S) + H2(X1Σg+) depletion reaction are compared with available theoretical results, which are based on the adiabatic PESs. Large discrepancies are found between the adiabatic and diabatic values, especially at low J values, which indicate that the non-adiabatic effect is very great and cannot be simply ignored. Furthermore, the deviations between adiabatic and diabatic values gradually decrease as the collision energy increases.
Collapse
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.
| | | | | |
Collapse
|
7
|
Effects of rovibrational excitation of LiH on the LiH depletion and H exchange channels for the reaction H ( 2S) + LiH (X 1Σ+) on a new potential energy surface. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
He D, Zhang T, Yuan J, Wang M. A new potential energy surface of the LiHO+ system and the dynamics studies of the O + LiH+ reaction. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.11.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
9
|
Fu L, Wang D, Huang X. Accurate potential energy surfaces for the first two lowest electronic states of the Li (2p) + H2 reaction. RSC Adv 2018; 8:15595-15602. [PMID: 35539505 PMCID: PMC9080088 DOI: 10.1039/c8ra02504e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 04/15/2018] [Indexed: 01/17/2023] Open
Abstract
The accuracy of three-dimensional adiabatic and diabatic potential energy surfaces is calculated using ab initio methods and is numerically fitted for the two lowest electronic states 1 and 22A′ of the LiH2 system, which are very important for the Li (2p) + H2 reaction. The finite difference method is performed to generate the mixing angles, which are used to educe the diabatic potential from the adiabatic potential. The accurate conical intersection (CI) is studied in this work with three different basis sets. The energy of the conical intersection is slightly lower (nearly 0.12 eV) than that of the perpendicular intermediate on the first excited state. By analyzing the potential energy surfaces in this work we can suggest that the most possible reaction pathway for the title reaction is Li (2p) + H2 → LiH2 (22A′) (C2v) → CI → LiH2 (12A′) (C2v) → LiH⋯H → LiH (X1∑g+) + H. The conical intersection and (22A′) intermediate may play a vital role in the title reaction. Accurate diabatic potential energy surfaces for the Li (2p) + H2 → LiH (X) + H reaction are produced.![]()
Collapse
Affiliation(s)
- Liwei Fu
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People’s Republic of China
| | - Dequan Wang
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People’s Republic of China
| | - Xuri Huang
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People’s Republic of China
| |
Collapse
|
10
|
Wang S, Yuan J, Li H, Chen M. A neural network potential energy surface for the NaH 2 system and dynamics studies on the H( 2S) + NaH(X 1Σ +) → Na( 2S) + H 2(X 1Σ g+) reaction. Phys Chem Chem Phys 2017; 19:19873-19880. [PMID: 28597884 DOI: 10.1039/c7cp02153d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In order to study the dynamics of the reaction H(2S) + NaH(X1Σ+) → Na(2S) + H2(X1Σg+), a new potential energy surface (PES) for the ground state of the NaH2 system is constructed based on 35 730 ab initio energy points. Using basis sets of quadruple zeta quality, multireference configuration interaction calculations with Davidson correction were carried out to obtain the ab initio energy points. The neural network method is used to fit the PES, and the root mean square error is very small (0.00639 eV). The bond lengths, dissociation energies, zero-point energies and spectroscopic constants of H2(X1Σg+) and NaH(X1Σ+) obtained on the new NaH2 PES are in good agreement with the experiment data. On the new PES, the reactant coordinate-based time-dependent wave packet method is applied to study the reaction dynamics of H(2S) + NaH(X1Σ+) → Na(2S) + H2(X1Σg+), and the reaction probabilities, integral cross-sections (ICSs) and differential cross-sections (DCSs) are obtained. There is no threshold in the reaction due to the absence of an energy barrier on the minimum energy path. When the collision energy increases, the ICSs decrease from a high value at low collision energy. The DCS results show that the angular distribution of the product molecules tends to the forward direction. Compared with the LiH2 system, the NaH2 system has a larger mass and the PES has a larger well at the H-NaH configuration, which leads to a higher ICS value in the H(2S) + NaH(X1Σ+) → Na(2S) + H2(X1Σg+) reaction. Because the H(2S) + NaH(X1Σ+) → Na(2S) + H2(X1Σg+) reaction releases more energy, the product molecules can be excited to a higher vibrational state.
Collapse
Affiliation(s)
- Shufen Wang
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P. R. China.
| | | | | | | |
Collapse
|
11
|
He D, Yuan J, Chen M. Influence of rovibrational excitation on the non-diabatic state-to-state dynamics for the Li(2p) + H 2 → LiH + H reaction. Sci Rep 2017; 7:3084. [PMID: 28596568 PMCID: PMC5465068 DOI: 10.1038/s41598-017-03274-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 04/26/2017] [Indexed: 12/03/2022] Open
Abstract
The non-adiabatic state-to-state dynamics of the Li(2p) + H2 → LiH + H reaction has been studied using the time-dependent wave packet method, based on a set of diabatic potential energy surfaces recently developed by our group. Integral cross sections (ICSs) can be increase more than an order of magnitude by the vibrational excitation of H2, whereas the ICSs are barely affected by the rotational excitation of H2. Moreover, ICSs of the title reaction with vibrationally excited H2 decrease rapidly with increasing collision energy, which is a typical feature of non-threshold reaction. This phenomenon implies that the title reaction can transformed from an endothermic to an exothermic reaction by vibrational excitation of H2. With the increase of the collision energy, the sideways and backward scattered tendencies of LiH for the Li(2p) + H2(v = 0, j = 0, 1) → LiH + H reactions are enhanced slightly, while the backward scattering tendency of LiH for the Li(2p) + H2(v = 1, j = 0) → LiH + H reaction becomes remarkably weakened. For the reaction with vibrationally excited H2 molecule, both direct and indirect reaction mechanism exist simultaneously.
Collapse
Affiliation(s)
- Di He
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Jiuchuang Yuan
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Maodu Chen
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P. R. China.
| |
Collapse
|
12
|
Huran AW, González-Sánchez L, Gomez-Carrasco S, Aldegunde J. A Quantum Mechanical Study of the k–j and k′–j′ Vector Correlations for the H + LiH → Li + H2 Reaction. J Phys Chem A 2017; 121:1535-1543. [DOI: 10.1021/acs.jpca.6b10094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ahmad W. Huran
- Departamento de
Química Física, Facultad de Ciencias Químicas, University of Salamanca, 37008 Salamanca, Spain
- Instituto de Ciencia Molecular, Universidad de Valencia, 46890 Paterna, Spain
| | - L. González-Sánchez
- Departamento de
Química Física, Facultad de Ciencias Químicas, University of Salamanca, 37008 Salamanca, Spain
| | - S. Gomez-Carrasco
- Departamento de
Química Física, Facultad de Ciencias Químicas, University of Salamanca, 37008 Salamanca, Spain
| | - J. Aldegunde
- Departamento de
Química Física, Facultad de Ciencias Químicas, University of Salamanca, 37008 Salamanca, Spain
| |
Collapse
|
13
|
|
14
|
He D, Yuan J, Li H, Chen M. Global diabatic potential energy surfaces and quantum dynamical studies for the Li(2p) + H2(X(1)Σ(+)g) → LiH(X(1)Σ(+)) + H reaction. Sci Rep 2016; 6:25083. [PMID: 27125781 PMCID: PMC4850413 DOI: 10.1038/srep25083] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 04/11/2016] [Indexed: 11/09/2022] Open
Abstract
The global diabatic potential energy surfaces which are correlated with the ground state 1A' and the excited state 2A' of the Li(2p) + H2 reaction are presented in this study. The multi-reference configuration interaction method and large basis sets (aug-cc-pVQZ for H atom and cc-pwCVQZ for Li atom) were employed in the ab initio single-point energy calculations. The diabatic potential energies were generated by the diabatization scheme based on transition dipole moment operators. The neural network method was utilized to fit the matrix elements of the diabatic energy surfaces, and the root mean square errors were extremely small (3.69 meV for , 5.34 meV for and 5.06 meV for ). The topographical features of the diabatic potential energy surfaces were characterized and the surfaces were found to be sufficiently smooth for the dynamical calculation. The crossing seam of the conical intersections between the and surfaces were pinpointed. Based on this new analytical diabatic potential energy surfaces, time-dependent wave packet calculation were conducted to investigate the mechanism of the title reaction. At low collision energies, the product LiH molecule tends to forward scattering, while at high collision energies, the forward and backward scatterings exist simultaneously.
Collapse
Affiliation(s)
- Di He
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jiuchuang Yuan
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Huixing Li
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Maodu Chen
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, PR China
| |
Collapse
|
15
|
He X, Wu H, Zhang P, Zhang Y. Quantum State-to-State Dynamics of the H + LiH → H2 + Li Reaction. J Phys Chem A 2015. [DOI: 10.1021/acs.jpca.5b05178] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohu He
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Wu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| | - Peiyu Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| | - Yan Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| |
Collapse
|
16
|
Yuan J, He D, Chen M. A new potential energy surface for the ground electronic state of the LiH2 system, and dynamics studies on the H((2)S) + LiH(X(1)Σ(+)) → Li((2)S) + H2(X(1)Σg(+)) reaction. Phys Chem Chem Phys 2015; 17:11732-9. [PMID: 25870863 DOI: 10.1039/c4cp05352d] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new global potential energy surface (PES) is obtained for the ground electronic state of the LiH2 system based on high-level energies. The energy points are calculated at the multireference configuration interaction level with aug-cc-pVXZ (X = Q, 5) basis sets, and these energies are extrapolated to the complete basis set limit. The neural network method and hierarchical construction scheme are applied in the fitting process and the root mean square error of the fitting result is very small (0.004 eV). The dissociation energies and equilibrium distances for LiH(X(1)Σ(+)) and H2(X(1)Σg(+)) obtained from the new PES are in good agreement with the experimental data. On the new PES, time-dependent wave packet studies for the H((2)S) + LiH(X(1)Σ(+)) → Li((2)S) + H2(X(1)Σg(+)) reaction have been carried out. In this reaction, no threshold is found due to the absence of an energy barrier on the minimum energy path. The calculated integral cross sections are high at low collision energy and will decrease with the increase of the collision energy. The product molecule H2 tends to be forward scattering due to direct reactive collisions, which becomes more evident at higher collision energies.
Collapse
Affiliation(s)
- Jiuchuang Yuan
- Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, P. R. China.
| | | | | |
Collapse
|
17
|
|
18
|
|
19
|
Sha GY, Yuan JC, Meng CG, Chen MD. Influence of early-staged energy barrier on stereodynamics of reaction of LiH(ν=0, j=0)+H→Li + H2. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-3134-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
20
|
Influence of collision energy and reagent vibrational excitation on the stereodynamics of the reaction H+LiH→H2+Li. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
21
|
WANG YULIANG, ZHANG JINCHUN, TIAN BAOGUO, WANG KUN, LIANG XIAORUI, ZHOU MINGYU. QUASI-CLASSICAL TRAJECTORY STUDY OF THE REACTION PROBABILITY AND CROSS SECTION OF THE REACTION LiH + H. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633612500939] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Based on the new accurate potential energy surface of the ground state of LiH2 system. Quasi-classical trajectory (QCT) calculations were carried out for the reaction LiH + H . The reaction probability of the title reaction for J = 0 has been calculated. The reaction cross sections were calculated as functions of the collision energy in the range 0.1–2.5 eV. The results were found to be well consistent with the previous real wave packet (RWP) and QCT results.
Collapse
Affiliation(s)
- YULIANG WANG
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| | - JINCHUN ZHANG
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| | - BAOGUO TIAN
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| | - KUN WANG
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| | - XIAORUI LIANG
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| | - MINGYU ZHOU
- Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, P. R. China
| |
Collapse
|
22
|
The effects of collision energy and reagent vibrational excitation on the reactivity of the reaction H+LiH: A quasiclassical trajectory study. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Wang Y, Zhang J, Jiang Y, Wang K, Zhou M, Liang X. Investigation of Stereo-dynamic Properties for the Reaction H+HLi by Quasi-classical Trajectory Approach. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.9.2873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
24
|
Roy T, Mahapatra S. Quantum dynamics of H + LiH reaction and its isotopic variants. J Chem Phys 2012; 136:174313. [DOI: 10.1063/1.4707144] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
25
|
Liu Y, He X, Shi D, Sun J. Stereodynamics of the reaction H+LiH (v=0,j=0)→H2+Li and its isotopic variants. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.01.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
26
|
Testing the lithium chemistry for early universe models with a quantum reactive method. RENDICONTI LINCEI 2011. [DOI: 10.1007/s12210-011-0114-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
27
|
|
28
|
Prudente FV, Marques JM, Maniero AM. Time-dependent wave packet calculation of the LiH + H reactive scattering on a new potential energy surface. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.04.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|