1
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Steffen J. Caracal: A Versatile Ring Polymer Molecular Dynamics Simulation Package. J Chem Theory Comput 2023; 19:5334-5355. [PMID: 37555628 DOI: 10.1021/acs.jctc.3c00568] [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
A new open-source program package named Caracal covering simulations of molecular systems with ring polymer molecular dynamics (RPMD) is presented. It combines a powerful RPMD implementation including chemical reaction rate calculations and biased periodic and nonperiodic samplings with a collection of easy to set up potential energy surface (PES) methodologies, thus delivering an all-inclusive approach. Most implemented PESs are based on the QMDFF and EVB-QMDFF methods. Where the quantum mechanically derived force field (QMDFF) can be set up for an arbitrary molecular system in a black-box fashion, the empirical valence bond (EVB)-QMDFF connects two QMDFFs and is able to represent the PES of a chemical reaction. With our previously published flavors of this composite method, PESs for almost arbitrary gas phase thermal ground state reactions can be set up. Given an optimized reaction path, the mechanism of the reaction can be classified and RPMD rate constants can be obtained via umbrella sampling and recrossing calculations on an EVB-QMDFF PES. Further, QMDFFs can be polymerized for the description of liquid systems. In this paper, the internal structure as well as the handling philosophy of Caracal are outlined. Further, examples of the different possible kinds of calculations are given.
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Affiliation(s)
- Julien Steffen
- Chair of Theoretical Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Bavaria, Germany
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2
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Zhang L, Zhao J, Liu D, Wang W, Yue D, Song Y, Meng Q. A new global analytical ab initio potential energy surface for the dynamics of the C +( 2P) + SH(X 2Π) reaction. Phys Chem Chem Phys 2022; 24:1007-1015. [PMID: 34927636 DOI: 10.1039/d1cp04948h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The global potential energy surface (PES) of HCS+(X1Σ+) is constructed using many-body expansion (MBE) methodology. The obtained analytical function is found by fitting the 7907 ab initio energy points computed at the Davidson-corrected multi-reference configuration interaction level with the aug-cc-pV(5+d)Z basis set. The final root mean square error is 0.0419 eV, and the maximum deviation is 0.2039 eV, showing that the analytical formula agrees well with the energy points. The topological features are calculated and discussed based upon the analytical PES of HCS+(X1Σ+). The reaction probability, integral cross sections and other details of the C+(2P) + SH(X2Π) → H(2S) + CS+(X2Σ+) reaction are investigated using the quasi-classical trajectory and time-dependent quantum wave packet methods.
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Affiliation(s)
- Lulu Zhang
- School of Science, Shandong Jiaotong University, 250357, Jinan, China.
| | - Juan Zhao
- School of Science, Shandong Jiaotong University, 250357, Jinan, China.
| | - Dong Liu
- School of Science, Shandong Jiaotong University, 250357, Jinan, China.
| | - Wei Wang
- School of Science, Shandong Jiaotong University, 250357, Jinan, China.
| | - Daguang Yue
- School of Science, Shandong Jiaotong University, 250357, Jinan, China.
| | - Yuzhi Song
- School of Physics and Electronics, Shandong Normal University, 250358, Jinan, China.
| | - Qingtian Meng
- School of Physics and Electronics, Shandong Normal University, 250358, Jinan, China.
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3
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A comparative multi-state multi-dimensional quantum-classical dynamics on compact polycyclic aromatic hydrocarbons (CPAHs) by parallel TDDVR method. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.113032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Yang J, Wang Z, Lv G, Liu W, Wang Y, Sun X, Gao J. Indirect photodegradation of fludioxonil by hydroxyl radical and singlet oxygen in aquatic environment: Mechanism, photoproducts formation and eco-toxicity assessment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 197:110644. [PMID: 32325330 DOI: 10.1016/j.ecoenv.2020.110644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/12/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Fludioxonil has been proven valuable as a broad-spectrum fungicide. However, there are concerns about its risk posed to non-target organisms in aquatic environments. In this paper, the mechanism, photoproducts transformation and eco-toxicity of fludioxonil during •OH/1O2-initiated process were systematically studied using quantum chemistry and computational toxicology. The results indicate that the two favorable pathways of •OH/1O2-initiated reactions are both occurred in pyrrole ring. It can conclude that the rate constants of •OH and 1O2 are 1.23 × 1010 and 3.69 × 107 M-1 s-1 at 298K, respectively, which results in half-lives of <2 days in surface waters under sunlit near-surface conditions. Based on toxicity assessments, these photoproducts showed a decreased aquatic toxicity but the majority products are still toxic. This study gives more insight into the chemical transformation mechanism of fludioxonil in aquatic environments.
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Affiliation(s)
- Jiaoxue Yang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Zehua Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Guochun Lv
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Wen Liu
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Yan Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Xiaomin Sun
- Environment Research Institute, Shandong University, Qingdao, 266237, China.
| | - Jian Gao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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5
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Calculation of anharmonic effects for the unimolecular dissociation of CF3XCF2CH3 (X = Cl, Br) and CF3XCF2CD3 (X = Cl, Br). Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136826] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Steffen J. A new class of reaction path based potential energy surfaces enabling accurate black box chemical rate constant calculations. J Chem Phys 2019; 150:154105. [DOI: 10.1063/1.5092589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Julien Steffen
- Institut für Physikalische Chemie, Christian-Albrechts-Universität, Olshausenstraße 40, D–24098 Kiel, Germany
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7
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Lü R. Low-energy stereodynamics in the ion–molecule reactions D+ + D2/HD and H+ + H2/HD: reagent vibrational excitation effect and mass factor effect. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2233-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Steffen J, Hartke B. Cheap but accurate calculation of chemical reaction rate constants from ab initio data, via system-specific, black-box force fields. J Chem Phys 2017; 147:161701. [DOI: 10.1063/1.4979712] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Pratihar S, Ma X, Homayoon Z, Barnes GL, Hase WL. Direct Chemical Dynamics Simulations. J Am Chem Soc 2017; 139:3570-3590. [DOI: 10.1021/jacs.6b12017] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Subha Pratihar
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Xinyou Ma
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Zahra Homayoon
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - George L. Barnes
- Department
of Chemistry and Biochemistry, Siena College, Loudonville, New York 12211, United States
| | - William L. Hase
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
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10
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Claudino D, Gargano R, Carvalho-Silva VH, E Silva GM, da Cunha WF. Investigation of the Abstraction and Dissociation Mechanism in the Nitrogen Trifluoride Channels: Combined Post-Hartree-Fock and Transition State Theory Approaches. J Phys Chem A 2016; 120:5464-73. [PMID: 27355487 DOI: 10.1021/acs.jpca.6b04947] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present paper concludes our series of kinetics studies on the reactions involved in the complex mechanism of nitrogen trifluoride decomposition. Two other related reactions that, along with this mechanism, take part in an efficient boron nitride growth process are also investigated. We report results concerning two abstraction reactions, namely NF2 + N ⇄ 2NF and NF3 + NF ⇄ 2NF2, and two dissociations, N2F4 ⇄ 2NF2 and N2F3 ⇄ NF2 + NF. State-of-the-art electronic structure calculations at the CCSD(T)/cc-pVTZ level of theory were considered to determine geometries and frequencies of reactants, products, and transition states. Extrapolation of the energies to the complete basis set limit was used to obtain energies of all the species. We applied transition state theory to compute thermal rate constants including Wigner, Eckart, Bell, and deformed theory corrections in order to take tunneling effects into account. The obtained results are in good agreement with the experimental data available in the literature and are expected to provide a better phenomenological understanding of the NF3 decomposition role in the boron nitride growth for a wide range of temperature values.
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Affiliation(s)
- D Claudino
- Quantum Theory Project, Gainesville, Florida 32611-2085, United States
| | - R Gargano
- Institute of Physics, University of Brasilia , Brasilia, 70.919-970, Brazil
| | - Valter H Carvalho-Silva
- Grupo de Química Teórica e Estrutural de Anápolis, Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás , CP 459, Anápolis, 75001-970, Brazil
| | - Geraldo M E Silva
- Institute of Physics, University of Brasilia , Brasilia, 70.919-970, Brazil
| | - W F da Cunha
- Quantum Theory Project, Gainesville, Florida 32611-2085, United States.,Institute of Physics, University of Brasilia , Brasilia, 70.919-970, Brazil
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11
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Coriolis coupling effects in the H+Li2(X1Σg+)→LiH(X1Σ+)+Li reaction: A time-dependent wave packet investigation. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.03.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Sardar S. Classical blended quantum formulation of the parallel TDDVR method to the dynamics on furan. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s021963361550039x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A major portion (∼98%) of the quantum-classical molecular dynamics approach, namely, Time-Dependent Discrete Variable Representation (TDDVR) method, is recently parallelized using shared-memory parallelization scheme with the aim of performing dynamics on relatively large molecular systems. Therefore, we have chosen the furan as a model system for dynamical simulation. Four lowest singlet excited electronic states 1A2(3s), 1B2(V), 1A1(V*), and 1B1(3p) of furan are vibronically coupled through several conical intersections in the vicinity of Frank-Condon region. The major focus of the present paper is to explore the efficiency of our newly implemented parallelized TDDVR algorithm to perform dynamics on large dimensional quantum systems in vibronically coupled electronic manifold. The present version of parallelized TDDVR algorithm show closely linear speed up with increasing number of computing processors. As a significant speed up is achieved by cycling in the correct way over arrays, all dynamical simulations are performed within a reasonable wall clock time. The photoelectron spectra calculated by the TDDVR method show peak by peak correspondence with the experimental spectra. The TDDVR calculated quantum-classical dynamical outcomes, viz., population and photoelectron spectra, etc. show good agreement with the findings of the well-established quantum dynamical method, i.e. Multi Configuration Time-Dependent Hartree (MCTDH) approach.
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Affiliation(s)
- Subhankar Sardar
- Department of Chemistry, Bhatter College, Dantan, P. O. Dantan, Paschim Medinipur, Pin-721426, West Bengal, India
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13
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Ding Y, Xia W, Song L, Yao L. Quasi-classical trajectory study of the reaction dynamics of calcium ground state and metastable atoms with CH 2Cl 2. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The dynamics properties of the Ca(1S0,3P) + CH2Cl2 reaction system have been calculated by means of the quasi-classical trajectory method based on the extended London–Eyring–Polanyi–Sato potential energy surface. By the calculations, the vibrational distribution, reaction cross section, rotational alignment, and reaction rate constant are obtained. The peak location of vibrational quantum numbers is at ν = 0 when the collision energy is 2.302 kcal/mol, whether the calcium atom is at the ground state or metastable state. The product vibrational distribution agrees well with the experiment value in Han, K. L.; He, G. Z.; Lou, N. Q. Chem. Phys. Lett. 1991, 178, 528. The cross section thoroughly decreases with the increase of the collision energy. The rotational alignment of the product greatly deviates from –0.5. The reaction rate constant increases with rising temperature.
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Affiliation(s)
- Yang Ding
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
| | - Wenwen Xia
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
| | - Liguo Song
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
| | - Li Yao
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P.R. China
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14
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Cheng D, Yuan J, Chen M. Non-Born–Oppenheimer stereodynamics study for the D + + H 2 ( v, j = 0) reaction using coherent switching with decay of mixing method. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A non-Born–Oppenheimer (BO) investigation using coherent switching with decay of mixing method is carried out for both reactive non-charge transfer and charge transfer channels of reaction D+ + H2 (v, j = 0). For the non-charge transfer channel, it is found that the non-BO effect has a small influence on the differential cross section, but it has a large impact on the rotational polarization of the HD product, which is reflected by the joint distribution P(θr, ϕr). And it is also found that the polarization of the charge transfer products shows a quite different form. The rotational polarizations are also investigated at various collision energies and initial vibrational states for both reactive channels.
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Affiliation(s)
- Dahai Cheng
- 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
- 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
- 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
- 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
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15
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Effect of collision energy on the reaction mechanism of C(3P) + OH(X 2 Π) → CO(X 1 Σ +) + H(2S). J Mol Model 2015; 21:103. [DOI: 10.1007/s00894-015-2634-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/22/2015] [Indexed: 11/30/2022]
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16
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Golibrzuch K, Shirhatti PR, Geweke J, Werdecker J, Kandratsenka A, Auerbach DJ, Wodtke AM, Bartels C. CO desorption from a catalytic surface: elucidation of the role of steps by velocity-selected residence time measurements. J Am Chem Soc 2015; 137:1465-75. [PMID: 25436871 DOI: 10.1021/ja509530k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Directly measuring the rate of a surface chemical reaction remains a challenging problem. For example, even after more than 30 years of study, there is still no agreement on the kinetic parameters for one of the simplest surface reactions: desorption of CO from Pt(111). We present a new experimental technique for determining rates of surface reactions, the velocity-selected residence time method, and demonstrate it for thermal desorption of CO from Pt(111). We use UV−UV double resonance spectroscopy to record surface residence times at selected final velocities of the desorbing CO subsequent to dosing with a pulsed molecular beam. Velocity selection differentiates trapping-desorption from direct scattering and removes influences on the temporal profile arising from the velocity distribution of the desorbing CO. The kinetic data thus obtained are of such high quality that bi-exponential desorption kinetics of CO from Pt(111) can be clearly seen. We assign the faster of the two rate processes to desorption from (111) terraces, and the slower rate process to sequential diffusion from steps to terraces followed by desorption. The influence of steps, whose density may vary from crystal to crystal, accounts for the diversity of previously reported (single exponential) kinetics results. Using transition-state theory, we derive the binding energy of CO to Pt(111) terraces, D(0)(terr) (Pt−CO) = 34 ± 1 kcal/mol (1.47 ± 0.04 eV) for the low coverage limit (≤0.03 ML) where adsorbate−adsorbate interactions are negligible. This provides a useful benchmark for electronic structure theory of adsorbates on metal surfaces.
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Affiliation(s)
- Kai Golibrzuch
- Institute for Physical Chemistry, Georg-August University of Göttingen , 37073 Göttingen, Germany
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18
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Ran Y, Wang JB, Yin YX. Theoretical study on the SiH4−nCln (n=0–4) reaction mechanisms for polysilicon production process. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.02.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Li W, Tian D, Lin Z, Wang D, Yu H. Study on the variation rules of the joint effects for multicomponent mixtures containing cyanogenic toxicants and aldehydes based on the transition state theory. JOURNAL OF HAZARDOUS MATERIALS 2014; 267:98-108. [PMID: 24418495 DOI: 10.1016/j.jhazmat.2013.12.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 12/10/2013] [Accepted: 12/14/2013] [Indexed: 06/03/2023]
Abstract
Although the study of the variation rules of the joint effects for multicomponent mixtures has gained increasing attention, it still remains unclear how the variation occurs and what the relationships between the joint effects of multicomponent mixtures and their corresponding binary mixtures are. To explain how the variation occurs, this study first proposes a hypothesis on the variation rules of the joint effects using the well-known transition state theory. The hypothesis concluded that the joint effect of multicomponent mixtures is among the joint effects of the corresponding binary mixtures. This hypothesis was named the fishing hypothesis because there is a similarity between the action process of the joint effects and the fishing process. Next, the hypothesis was validated by use of the experimental data by evaluating the joint effects of binary, ternary and quaternary mixtures containing cyanogenic toxicants and aldehydes on Photobacterium phosphoreum. The application of the fishing hypothesis can explain the rule as to how the joint effects of a multicomponent-mixture vary with its number of components and their ratios. This study provides a good method to predict the joint effects of multicomponent mixtures using the joint effects of their corresponding binary mixtures. An improvement in the fishing hypothesis will be needed in our future studies due to the approximate assumptions used in the deduction of the hypothesis.
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Affiliation(s)
- Weiying Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Dayong Tian
- Department of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China
| | - Zhifen Lin
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Collaborative Innovation Center for Regional Environmental Quality, China.
| | - Dali Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Hongxia Yu
- Collaborative Innovation Center for Regional Environmental Quality, China; School of the Environment, State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, China
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20
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Huang Y. Stereodynamic study of the reaction H(²S) + ClO(²Π) → HO(²Π) + Cl(²P) via quasi-classical trajectory calculations. J Mol Model 2014; 20:2151. [PMID: 24562860 DOI: 10.1007/s00894-014-2151-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 01/05/2014] [Indexed: 11/25/2022]
Abstract
Quasi-classical trajectory calculations were performed to investigate the stereodynamics of the reaction H(²S) + ClO(²Π) → HO(²Π) + Cl(²P) using the ground-state potential energy surface 1¹A'. The alignment and orientation of the product molecules as well as the four polarization-dependent differential cross-sections (PDDCSs) for this reaction across a wide range of collision energies (0.05-1.0 eV) and for the rovibrational state ClO(v = 0 and j = 0) were obtained and are reported here. It was found that the OH product rotational polarization is not very sensitive to the collision energy selected. We discuss this phenomenon in detail. The calculated results indicate that, for this system, the two deep wells in the potential energy surface are very likely to be powerful influences on the degree of product rotational polarization. In addition, the microscopic reaction mechanism that dictates the product angular momentum orientation was investigated. The forward peak in the PDDCS₀₀ at θ = 0° in our study showed a strong dependence on the initial collision energy.
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Affiliation(s)
- Yanru Huang
- College of Science, Liaoning Shihua University, Fushun, Liaoning, 113001, People's Republic of China,
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21
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Li X, Arasa C, van Hemert MC, van Dishoeck EF. Effects of Reagent Rotation and Vibration on H + OH (υ, j)→ O + H2. J Phys Chem A 2013; 117:12889-96. [DOI: 10.1021/jp4068153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaohu Li
- Leiden
Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
| | - Carina Arasa
- Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Marc C. van Hemert
- Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Ewine F. van Dishoeck
- Leiden
Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
- Max-Planck Institut für Extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching, Germany
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Zhao J, Miao X, Luo Y. Time-dependent wave packet quantum scattering and quasi-classical trajectory calculations of the H + FCl(v=0,j=0) → HF + Cl/HCl + F reaction. J Phys Chem A 2013; 117:11411-9. [PMID: 24125031 DOI: 10.1021/jp4070592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dynamics of the title reaction are investigated using both time-dependent wave packet quantum scattering and quasi-classical trajectory (QCT) methods on adiabatic ground 1(2)A' potential energy surface (PES). Compared with the quantum results of reaction probabilities of H + FCl(J=0) → HF + Cl/HCl + F, the QCT method is proven feasible and further employed to produce integral cross sections and rate constants. Significant resonance structures are observed in the reaction probabilities using the quantum method; however, there are some undulations in the calculated QCT integral cross sections for both product channels. A comparison between the quantum mechanical coupled-channel (CC) calculation and centrifugal sudden approximation calculation reveals the very important role of Coriolis coupling effects in the quantum calculation. Comparisons between the calculated thermal rate constants for both reactions and the previous theoretical and experimental results have been done. HCl product formation is favored over the HF product in the reactive system. Finally, the HF products are found to be mainly forward scattering, and the HCl products are mainly backward scattering.
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Affiliation(s)
- Juan Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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ZHAO ZHEN, WANG DI, WANG QI, LI ZHI, FANG ZHIGANG. QUANTUM CHEMICAL STUDY ON THERMAL DECOMPOSITION MECHANISM OF CALCIUM CARBONATE. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500491] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A detailed quantum chemical calculation is performed at the MP2(full)/6-311G* level to explore the mechanism of calcium carbonate thermal decomposition. Four microscopic pathways are identified. The rate constants of rate-determining steps in four pathways are calculated over a temperature range 298–1200 K. The calculating results show that only path A (R( CaCO 3) → IM 1 → P( CaO + CO 2)) and path B (R( CaCO 3) → IM B1 → IM B2 → P( CaO + CO 2) have contributions to the CaCO 3 thermal decomposition, and path A may be more favorable than path B. The present theoretical studies may provide useful information in understanding reaction mechanism of metal carbonates at the molecular level.
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Affiliation(s)
- ZHEN ZHAO
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China
- School of Chemistry and Life Science, Anshan Normal University, Anshan 114007, P. R. China
| | - DI WANG
- School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China
| | - QI WANG
- School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, P. R. China
| | - ZHI LI
- School of Science, University of Science and Technology Liaoning, Anshan 114051, P. R. China
| | - ZHIGANG FANG
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China
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24
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Quasi-classical trajectory study of the reaction N(4S) + H2 and its reverse reaction: Role of initial vibrational and rotational excitations in chemical stereodynamics. J CHEM SCI 2013. [DOI: 10.1007/s12039-013-0429-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Yao CX, Zhao GJ. Energy-dependent stereodynamics for the H(2S)+NH(X3)→H2(X1Σg+)+N(4S) reaction on the improved ZH potential energy surface. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this work, quasi-classical trajectory (QCT) calculations have been first carried out for the title reaction on a new global potential energy surface for the lowest quartet electronic state, 4A″. The average rotational alignment factor [P2(j'·k)] as a function of collision energy and the two commonly used polarization dependent generalized differential cross sections PDDCS00, PDDCS20, have been calculated in the center-of-mass (CM) frame, separately. Three angular distributions, P(θr), P(φr), and P(θr, φr) are also calculated to gain insight into the alignment and the orientation of the product molecules. Calculations show that the average rotational alignment factor on the ZH PES is almost invariant with collision energies. The distributions of P(θr) and P(φr) derived from the title reaction indicate that the product polarization is strong. Validity of the QCT calculation has been examined and proven in the comparison with the quantum-wave-packet calculation results. Comparisons with available quasi-classical trajectory results are made and discussed.
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Affiliation(s)
- Cui-Xia Yao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Guang-Jiu Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
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26
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Xu W, Zhang P. Accurate study on the quantum dynamics of the He + HeH(+) (X1Σ+) reaction on a new ab initio potential energy surface for the lowest 1(1)A' electronic singlet state. J Phys Chem A 2013; 117:1406-12. [PMID: 23347266 DOI: 10.1021/jp312084r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A time-dependent quantum wave packet method is used to investigate the dynamics of the He + HeH(+)(X(1)Σ(+)) reaction based on a new potential energy surface [Liang et al., J. Chem. Phys.2012, 136, 094307]. The coupled channel (CC) and centrifugal-sudden (CS) reaction probabilities as well as the total integral cross sections are calculated. A comparison of the results with and without Coriolis coupling revealed that the number of K states N(K) (K is the projection of the total angular momentum J on the body-fixed z axis) significantly influences the reaction threshold. The effective potential energy profiles of each N(K) for the He + HeH(+) reaction in a collinear geometry indicate that the barrier height gradually decreased with increased N(K). The calculated time evolution of CC and CS probability density distribution over the collision energy of 0.27-0.36 eV at total angular momentum J = 50 clearly suggests a lower reaction threshold of CC probabilities. The CC cross sections are larger than the CS results within the entire energy range, demonstrating that the Coriolis coupling effect can effectively promote the He + HeH(+) reaction.
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Affiliation(s)
- Wenwu Xu
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, PR China
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27
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CHAO VICTORWEIKEH(WU. STEREODYNAMICS, MASS EFFECT AND DOCKING FROM O(3P) + HD → OH + D AT E col = 0.4–1.0eV AND O(3P) + HD → OD + H AT E col = 0.5–1.0eV. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633612501040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Quasiclassical Trajectory (QCT) calculation for O(3P) + HD → OH + D and O(3P) + HD → OD + H at E col = 0.4–1.0 eV and 0.5–1.0 eV, respectively, on the lowest PES 1 3A″ of Kuppermann et al. has been done. Distribution p(ϑr) of azimuthal angles between the relative velocity k of the reactants and rotational angular momentum vector j′ of either OH or OD , p(φr) of polar as well as dihedral angles correlating k - k′ -j′, p(ϑr, φr), and PDDCS dependent upon the scattering angle ϑt of either OH , or OD between k and k′ of the reactants and products, respectively, are presented and discussed. The stereodynamics and isotopic mass effects at the smallest possible collision energies 0.4 eV and 0.5 eV for OH and OD , respectively, are significantly different. The significant mass effect with quotient 1/2 of H/D, at the corresponding collision threshold may be applied for the investigation of docking mechanism, drug modification and delivery.
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Affiliation(s)
- VICTOR WEI-KEH (WU) CHAO
- Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 80782 Kaohsiung, Taiwan
- Group 1101, State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, No. 457, Zhongshan Road, Dalian 116023, P. R. China
- Victor Basic Research Laboratory e. V. Gadderbaumer-Str. 22, D-33602 Bielefeld, Germany
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28
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Ramalho SS, da Cunha WF, Albernaz AF, Neto PHO, e Silva GM, Gargano R. An extensive investigation of reactions involved in the nitrogen trifluoride dissociation. NEW J CHEM 2013. [DOI: 10.1039/c3nj00553d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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29
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LI LIN, DONG SHUNLE. QUASICLASSICAL TRAJECTORY STUDY OF PRODUCT POLARIZATIONS IN THE H(2S) + NH → N(4S) + H2 REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633612500873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Based on the DMBE potential surface of the 4 A ″ ground-state, the product rotational polarizations in the title reaction are studied by using quasiclassical trajectory (QCT) calculation method. Three angular distributions of P(θr), P(Φr), P(θr, Φr) and the four polarization-dependent differential cross sections (PDDCSs) were calculated for the collision energy range of 1–20 kcal/mol. The results revealed that the product is backward-scattering and the product rotational angular momentum j′ is aligned and oriented. With the increment of collision energy, the degree of the product alignment and orientation is enhanced, showing the collision energy-dependent behaviors of the product polarizations.
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Affiliation(s)
- LIN LI
- College of Information Science and Engineering, Ocean University of China, Qingdao 266071, P. R. China
- College of Information Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - SHUNLE DONG
- College of Information Science and Engineering, Ocean University of China, Qingdao 266071, P. R. China
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30
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NIE SHANSHAN, CHU TIANSHU. VECTOR CORRELATIONS AND PRODUCT POLARIZATIONS IN THE N(2D) + D2 → ND + D REACTIVE SYSTEM. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633612500678] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The vector correlations between products and reagents of the N (2D) + D 2 reaction are investigated by employing quasi-classical trajectory (QCT) calculation on the accurate DMBE potential energy surface (PES) of the 2A″ state. Stereo-dynamic quantities, including the four generalized polarization-dependent differential cross-sections (PDDCSs), the angular distribution P(θr), the dihedral-angle distribution P(φr), as well as the product rotational angular distribution in the polar form of P(θr, φr), are calculated in the center-of-mass (CM) frame. The results indicate that the product rotational angular momentum j′ not only aligns along the y-axis, but also orients to the negative direction of the y-axis. The isotope effect in the context of chemical stereo-dynamics and influences of different versions of ground-state PESs on vector correlations are shown and discussed.
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Affiliation(s)
- SHANSHAN NIE
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - TIANSHU CHU
- Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, 266071, P. R. China
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31
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Kraka E, Zou W, Freindorf M, Cremer D. Energetics and Mechanism of the Hydrogenation of XHn for Group IV to Group VII Elements X. J Chem Theory Comput 2012; 8:4931-43. [DOI: 10.1021/ct300631s] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elfi Kraka
- CATCO Group, Department
of Chemistry, Southern Methodist
University, 3215 Daniel Ave, Dallas, Texas 75275-0314, United States
| | - Wenli Zou
- CATCO Group, Department
of Chemistry, Southern Methodist
University, 3215 Daniel Ave, Dallas, Texas 75275-0314, United States
| | - Marek Freindorf
- CATCO Group, Department
of Chemistry, Southern Methodist
University, 3215 Daniel Ave, Dallas, Texas 75275-0314, United States
| | - Dieter Cremer
- CATCO Group, Department
of Chemistry, Southern Methodist
University, 3215 Daniel Ave, Dallas, Texas 75275-0314, United States
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32
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YU YONGJIANG, WANG DEHUA, FENG SHUXIANG, XIA WENZE. INFLUENCE OF VIBRATIONAL EXCITATION AND COLLISION ENERGY ON THE STEREO DYNAMICS OF THE REACTIONS: N(4S)+H2(v = 0-3,j = 0) → NH(X3Σ-)+H. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633612500514] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Quasi-classical trajectory (QCT) calculations have been carried out to study the stereodynamics of the title reactions, using the double many-body expansion (DMBE) potential energy surface (PES) constructed by Poveda [Poveda LA, Varandas AJC, Phys. Chem. Chem. Phys.7:2867, 2005]. Vector correlations, such as the distributions of the polarization-dependent differential cross-sections (PDDCSs), the angular distributions of P(θr), P(ϕr), P(θr,ϕr), and the product alignment parameter P2( cos θr) are reported within the energy range of 25–140 kcal mol-1. The influences of the collision energy and the initial state-selected vibrational excitation are discussed in detail. In addition, Validity of the current QCT calculations is also examined and compared with the revelant results reported by Pascual et al. [Pascual RZ, Schatz GC, Lendvay G, Troya D, J. Phys. Chem. Aਠ106:4125, 2002].
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Affiliation(s)
- YONG-JIANG YU
- School of Physics, Ludong University, Yantai 264025, P. R. China
| | - DE-HUA WANG
- School of Physics, Ludong University, Yantai 264025, P. R. China
| | - SHU-XIANG FENG
- School of Physics, Ludong University, Yantai 264025, P. R. China
| | - WEN-ZE XIA
- School of Physics, Ludong University, Yantai 264025, P. R. China
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33
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Influence of collision energy on cross section and stereodynamical properties for the reaction H+OCl→OH+Cl. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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WANG TAO, MIAO XIANGYANG. INFLUENCE OF THE COLLISION ENERGY ON STEREODYNAMICS OF THE F + LiH (v = 0, j = 0) → LiF + H REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633611006530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The stereodynamics of the title reaction based on the ground 2A′ potential energy surface (PES) has been investigated using the method of the quasi-classical trajectory (QCT) at different collision energies (23 kcal/mol, 35 kcal/mol and 46 kcal/mol). The vector properties of the angular momentum (described by the distribution of K - J′P(θr), the dihedral angle distribution of K - K′ - J′P(φr) and the angular distribution P(θr, ϕr)) and the four PDDCSs [(2π/σ)(dσ00/dωt), (2π/σ)(dσ20/dωt), (2π/σ)(dσ22+/dωt), (2π/σ)(dσ21-/dωt)] of the product LiF at each collision energy have been presented, respectively. Further, the collision energy effects on the behavior of the product LiF have been discussed and studied.
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Affiliation(s)
- TAO WANG
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P. R. China
| | - XIANGYANG MIAO
- College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, P. R. China
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35
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Lv SJ, Zhang PY, Han KL, He GZ. Exact quantum scattering study of the H + HS reaction on a new ab initio potential energy surface H2S (3A″). J Chem Phys 2012; 136:094308. [DOI: 10.1063/1.3690051] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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36
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Zhao D, Chu T, Hao C. Vector correlations in the F + HO → HF + O reaction and its isotopic variant. J Mol Model 2012; 18:3283-9. [PMID: 22252836 DOI: 10.1007/s00894-012-1351-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 01/01/2012] [Indexed: 11/29/2022]
Abstract
The F + H(D)O → HF(DF) + O reactions have been studied using quasi-classical trajectory (QCT) calculation method, based on the three different potential energy surfaces (PESs) of Gomez-Carrasco et al. (J Chem Phys 2004, 121:4605; J Chem Phys 2005, 123:114310; Chem Phys Lett 2007, 435:188). Facilitated with the analysis of the QCT results, the pictures for product scattering and product polarizations have been presented to investigate the vector correlations in the two reactions, with effects of isotope substitution and electronic state as well as collision energy being revealed at a chemical stereodynamical level.
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Affiliation(s)
- Dan Zhao
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China
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37
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LIPING JU, RUIFENG LU. COMPARATIVE STUDY OF REACTION RATE CONSTANTS FOR THE NH3 + H → NH2 + H2 REACTION WITH GLOBE DYNAMICS AND TRANSITION STATE THEORIES. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633609005325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The nine-dimension quasi-classical trajectory (QCT) calculations have been carried out for the title reaction with a global potential energy surface (PES) constructed by Corchado and Espinosa-García (J Chem Phys106:4013, 1997). The detailed dynamics calculations cover the specific collision energies falling in the range of 0.62–3.04 eV, which are sufficient to fit the calculated reactive cross-sections into a barrier-type excitation function and to obtain the thermal rate constants. The present QCT rate constants are in good agreement with the recent quantum dynamics (QD) results, both of which are much lower than that of the previous variational transition state theory (VTST).
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Affiliation(s)
- JU LIPING
- Department of Physics, Shenyang Institute of Aeronautical Engineering, Shenyang 110136, P. R. China
| | - LU RUIFENG
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616, Singapore
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38
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YUE XIANFANG, CHENG JIE, ZHANG HONG. QUASI-CLASSICAL TRAJECTORY STUDY OF THE REACTIONS N(2D) WITH H2, D2, AND HD. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633610006080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Quasi-classical trajectory (QCT) calculations are carried out for the title reactions on the potential energy surface (PES) of Ho et al.1 Our calculated integral cross-section values have been compared with the recent two quantum mechanics (QM) ones: they are close to those of one QM calculation in the high collision energy range, but they approach to another one in the low collision energy range. The product rotational alignments 〈P2 (J' ⋅ K)〉 have also been calculated.
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Affiliation(s)
- XIAN-FANG YUE
- Department of Physics and Information Engineering, Jining University, Qufu 273155, P.R. China
| | - JIE CHENG
- Department of Physics and Information Engineering, Jining University, Qufu 273155, P.R. China
| | - HONG ZHANG
- Australian Institute for Bioengineering and Nanotechnology, Centre for Computational Molecular Science, The University of Queensland, Qld 4072, Brisbane, Australia
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39
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LUO XINLONG. A TRAJECTORY-FOLLOWING METHOD FOR SOLVING THE STEADY STATE OF CHEMICAL REACTION RATE EQUATIONS. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633609005283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This article gives a trajectory-following method for the steady state of chemical reaction rate equations. In order to avoid wasting unnecessary computing time during the steady-state phase and get roughly accurate solutions during the transient-state phase, this method is realized via adopting the semi-implicit Euler formula as the stepping direction and adaptively adjusting the time-step size by an analogous trust-region technique. Under some standard assumptions, its global convergence analysis and local superlinear convergence analysis are also given. Finally, some numerical experiments of this method, in comparison with the traditional optimization methods and ordinary differential equation methods, are reported. The numerical results show that this trajectory-following method is a promising solution for this class of problems.
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Affiliation(s)
- XIN-LONG LUO
- School of Information and Telecommunication Engineering, Beijing University of Posts and Telecommunications, P.O. Box 101, 100876, Peking, People's Republic of China
- Key Laboratory of Information Processing and Intelligent Technology, Ministry of Information Industry, P. O. Box 101, 100876, Peking, People's Republic of China
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40
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SONG PENG, ZHU YONGHUA, LIU JIANYONG, MA FENGCAI. THE STEREODYNAMICS STUDY OF THE C(3P) + OH (X2 Π) → CO(X1Σ+) + H(2S) REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633610006109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The stereodynamics of the title reaction on the ground electronic state X2A' potential energy surface (PES)1 has been studied using the quasiclassical trajectory (QCT) method. The commonly used polarization-dependent differential cross-sections (PDDCSs) of the product and the angular momentum alignment distribution, P(θr) and P(Φr), are generated in the center-of-mass frame using QCT method to gain insight of the alignment and orientation of the product molecules. Influence of collision energy on the stereodynamics is shown and discussed. The results reveal that the distribution of P(θr) and P(Φr) is sensitive to collision energy. The PDDCSs exhibit different collision energy dependency relationship at low and high collision energy ranges.
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Affiliation(s)
- PENG SONG
- Department of Physics, Liaoning University, Shenyang 110036, P. R. China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science Dalian 116023, P. R. China
| | - YONG-HUA ZHU
- Department of Physics, Liaoning University, Shenyang 110036, P. R. China
| | - JIAN-YONG LIU
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science Dalian 116023, P. R. China
| | - FENG-CAI MA
- Department of Physics, Liaoning University, Shenyang 110036, P. R. China
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41
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WEI QIANG, WU VICTORWEIKEH, ZHOU BO. EFFECTS OF ROTATIONAL AND VIBRATIONAL EXCITATION ON THE STEREODYNAMICS OF THE O (D-1) + HCl → OH + Cl REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633609005386] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The stereodynamics of the title reaction on the ground 1 1A′ potential energy surface (PES) has been studied using quasi-classical trajectory (QCT) method. Collision energy of 6.4 kcal/mol is considered, and vector properties including angular momentum alignment distributions and polarization-dependent differential cross-sections (PDDCS) of the product OH are presented. Furthermore, the influence of reagent rotational excitation and vibrational excitation on the product vector properties has also been studied in the present work. The results indicate that the distribution of the P(θr) and P(ϕr) are sensitively affected by the rotational and vibrational excitation. The rotational excitation decreases the degree of alignment and orientation, while vibrational excitation increases the degree of alignment and orientation. The PDDCS (2π/σ)(dσ20/dωt) and (2π/σ)(dσ22+/dωt) are sensitively influenced by rotational and vibrational excitations, while the PDDCS ((2π/σ)(dσ00/dωt)) and (2π/σ)(dσ21-/dωt) are not. The preference of forward scattering has been found from the results of PDDCS ((2π/σ)(dσ00/dωt)), which is in good agreement with the experimental results.
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Affiliation(s)
- QIANG WEI
- Department of Applied Physics, Chongqing Institute of Technology, Chongqing 400050, China
| | - VICTOR WEI-KEH WU
- Department of Chemical Engineering and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80782, Taiwan
| | - BO ZHOU
- Department of Applied Physics, Chongqing Institute of Technology, Chongqing 400050, China
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42
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Corchado JC, Espinosa-Garcia J, Yang M. Kinetics and dynamics of the NH3 + H → NH2 + H2 reaction using transition state methods, quasi-classical trajectories, and quantum-mechanical scattering. J Chem Phys 2011; 135:014303. [PMID: 21744898 DOI: 10.1063/1.3605242] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
On a recent analytical potential energy surface developed by two of the authors, an exhaustive kinetics study, using variational transition state theory with multidimensional tunneling effect, and dynamics study, using both quasi-classical trajectory and full-dimensional quantum scattering methods, was carried out to understand the reactivity of the NH(3) + H → NH(2) + H(2) gas-phase reaction. Initial state-selected time-dependent wave packet calculations using a full-dimensional model were performed, where the total reaction probabilities were calculated for the initial ground vibrational state and for four excited vibrational states of ammonia. Thermal rate constants were calculated for the temperature range 200-2000 K using the three methods and compared with available experimental data. We found that (a) the total reaction probabilities are very small, (b) the symmetric and asymmetric N-H stretch excitations enhance the reactivity, (c) the quantum-mechanical calculated thermal rate constants are about one order of magnitude smaller than the transition state theory results, which reproduce the experimental evidence, and (d) quasi-classical trajectory calculations, which were performed with the main goal of analyzing the influence of the zero-point energy problem on the final dynamics results, reproduce the quantum scattering calculations on the same surface.
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Affiliation(s)
- Jose C Corchado
- Departamento de Química Física, Universidad de Extremadura, 06071 Badajoz, Spain.
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43
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Kang LH, Zhang SZ, Zhu M, Dai B. Effect of vibrational and rotational excitation on the stereodynamics of the C(1D) + H2 (v, j) → CH + H reaction. CAN J CHEM 2011. [DOI: 10.1139/v11-098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The stereodynamics of the title reaction on the ab initio1A′ potential energy surface (PES) (B. Bussery-Honvault, P. Honvault, and J.-M. Launay. 2001. J. Chem. Phys. 115: 10701) at a collision energy of 16 kJ/mol have been studied using quasi-classical trajectory (QCT) method. Vector properties including angular momentum alignment parameters and four polarization-dependent differential cross sections (PDDCS) of the product CH are presented. Furthermore, the influence of reagent vibrational and rotational excitations on the product vector properties have also been studied in the present work. The calculated results indicate that the angle distributions of the CH product are mainly dominated by backward–forward scattering.
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Affiliation(s)
- Li-hua Kang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, P.R. China
| | - Shan-zheng Zhang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, P.R. China
| | - Mingyuan Zhu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, P.R. China
| | - Bin Dai
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, P.R. China
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A quasiclassical trajectory analysis of stereodynamics of the H + FCl (v = 0 – 3, j = 0 – 3) → HCl + F reaction. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0063-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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45
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Wei Q, Xie YK, Zhang F. Quasi-classical trajectory studies of the stereodynamics of the reaction O + HCl → ClO + H. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2011. [DOI: 10.1134/s0036024411080267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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47
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Zhao J. Quasi-classical trajectory study of the O(1D) + HF reaction dynamics on 11A′ potential energy surface. CAN J CHEM 2011. [DOI: 10.1139/v11-059] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The quasi-classical trajectory (QCT) calculations for the title reaction were carried out using the recently developed, accurate potential energy surface (PES) of the [Formula: see text] singlet state of the OHF system The integral cross section and the product rotational alignment factor [Formula: see text] were calculated as a function of collision energy. In addition, I discovered the effect of isotopic substitution on stereodynamics for the title reaction, and the influence of the rotation excitation of the reagent on stereodynamics is also presented. Both the scalar and vector properties of the reaction O(1D) + HF → OH + F(2P) are studied in this paper. It was found that the reaction is mainly controlled by an indirect reaction mechanism, and that the deep noncollinear insertion HOF well has a great impact on the dynamics of the reaction. The conclusions drawn in this paper will draw from references to similar reactions, and provide a theoretical foundation for related experiments.
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Affiliation(s)
- Juan Zhao
- School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, 116024, China
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CHEN TIANYUN, ZHAO NINGJIU, ZHANG WEIPING, WANG DONGJUN, WANG XINQIANG. Quasiclassical trajectory study on the integral cross-section and stereodynamics information of the reaction O ( 1 D) + H 2 (v = 0, j = 0 ) → OH + H. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0071-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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49
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Liu X, Liu H, Zhang Q. An ab initio potential energy surface and dynamics of the →ArH++H reaction. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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Peters B. Recent advances in transition path sampling: accurate reaction coordinates, likelihood maximisation and diffusive barrier-crossing dynamics. MOLECULAR SIMULATION 2010. [DOI: 10.1080/08927020903536382] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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