1
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Barone V, Crisci L, Di Grande S. Accurate Thermochemical and Kinetic Parameters at Affordable Cost by Means of the Pisa Composite Scheme (PCS). J Chem Theory Comput 2023; 19:7273-7286. [PMID: 37774410 PMCID: PMC10601482 DOI: 10.1021/acs.jctc.3c00817] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Indexed: 10/01/2023]
Abstract
A new strategy for the computation at an affordable cost of geometrical structures, thermochemical parameters, and rate constants for medium-sized molecules in the gas phase is proposed. The most distinctive features of the new model are the systematic use of cc-pVnZ-F12 basis sets, the addition of MP2 core-valence correlation in geometry optimizations by a double-hybrid functional, the separate extrapolation of MP2 and post-MP2 contributions, and the inclusion of anharmonic contributions in zero-point energies and thermodynamic functions. A thorough benchmark based on a wide range of prototypical systems shows that the new scheme outperforms the most well-known model chemistries without the need for any empirical parameter. Additional tests show that the computed zero-point energies and thermal contributions can be confidently used for obtaining accurate thermochemical and kinetic parameters. Since the whole computational workflow is translated in a black-box procedure, which can be followed with standard electronic structure codes, the way is paved for the accurate yet not prohibitively expensive study of medium- to large-sized molecules also by nonspecialists.
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Affiliation(s)
- Vincenzo Barone
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Luigi Crisci
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Silvia Di Grande
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56125 Pisa, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
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2
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Di Grande S, Kállay M, Barone V. Accurate thermochemistry at affordable cost by means of an improved version of the JunChS-F12 model chemistry. J Comput Chem 2023; 44:2149-2157. [PMID: 37432050 DOI: 10.1002/jcc.27187] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 06/23/2023] [Indexed: 07/12/2023]
Abstract
The junChS-F12 composite method has been improved by means of the latest implementation of the CCSD(F12*)(T+) ansatz and validated for the thermochemistry of molecules containing atoms of the first three rows of the periodic table. A thorough benchmark showed that this model, in conjunction with cost-effective revDSD-PBEP86-D3(BJ) reference geometries, offers an optimal compromise between accuracy and computational cost. If improved geometries are sought, the most effective option is to add MP2-F12 core-valence correlation corrections to CCSD(T)-F12b/jun-cc-pVTZ geometries without the need of performing any extrapolation to the complete basis set limit. In the same vein, CCSD(T)-F12b/jun-cc-pVTZ harmonic frequencies are remarkably accurate without any additional contribution. Pilot applications to noncovalent intermolecular interactions, conformational landscapes, and tautomeric equilibria confirm the effectiveness and reliability of the model.
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Affiliation(s)
- S Di Grande
- Classe di Scienze, Scuola Normale Superiore di Pisa, Pisa, Italy
- Scuola Superiore Meridionale, Napoli, Italy
| | - M Kállay
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, Hungary
- ELKH-BME Quantum Chemistry Research Group, Budapest, Hungary
- MTA-BME Lendület Quantum Chemistry Research Group, Budapest, Hungary
| | - V Barone
- Classe di Scienze, Scuola Normale Superiore di Pisa, Pisa, Italy
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3
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Koner D, Bemish RJ, Meuwly M. Dynamics on Multiple Potential Energy Surfaces: Quantitative Studies of Elementary Processes Relevant to Hypersonics. J Phys Chem A 2020; 124:6255-6269. [DOI: 10.1021/acs.jpca.0c01870] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Debasish Koner
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Raymond J. Bemish
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117, United States
| | - Markus Meuwly
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
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4
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Fortenberry RC, Lee TJ. Computational vibrational spectroscopy for the detection of molecules in space. ANNUAL REPORTS IN COMPUTATIONAL CHEMISTRY 2019. [DOI: 10.1016/bs.arcc.2019.08.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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5
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Meuwly M. Reactive molecular dynamics: From small molecules to proteins. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1386] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Markus Meuwly
- Department of Chemistry University of Basel Basel Switzerland
- Department of Chemistry Brown University Providence Rhode Island
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6
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Unke OT, Meuwly M. Toolkit for the Construction of Reproducing Kernel-Based Representations of Data: Application to Multidimensional Potential Energy Surfaces. J Chem Inf Model 2017; 57:1923-1931. [PMID: 28666387 DOI: 10.1021/acs.jcim.7b00090] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the early days of computation, slow processor speeds limited the amount of data that could be generated and used for scientific purposes. In the age of big data, the limiting factor usually is the method with which large amounts of data are analyzed and useful information is extracted. A typical example from chemistry are high-level ab initio calculations for small systems, which have nowadays become feasible even if energies at many different geometries are required. Molecular dynamics simulations often require several thousand distinct trajectories to be run. Under such circumstances suitable analytical representations of potential energy surfaces (PESs) based on ab initio calculations are required to propagate the dynamics at an acceptable cost. In this work we introduce a toolkit which allows the automatic construction of multidimensional PESs from gridded ab initio data based on reproducing kernel Hilbert space (RKHS) theory. The resulting representations require no tuning of parameters and allow energy and force evaluations at ab initio quality at the same cost as empirical force fields. Although the toolkit is primarily intended for constructing multidimensional potential energy surfaces for molecular systems, it can also be used for general machine learning purposes. The software is published under the MIT license and can be downloaded, modified, and used in other projects for free.
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Affiliation(s)
- Oliver T Unke
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Markus Meuwly
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, CH-4056 Basel, Switzerland
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7
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8
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Ge MH, Yang H, Zheng Y. Theoretical study of product polarization of O(1D) + HCl(v = 0; j = 0) → ClO + H and its isotope exchange reaction. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0288] [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
O(1D) + HCl(v = 0; j = 0) → ClO + H and its isotope exchange reaction O(1D) + DCl(v = 0; j = 0) → ClO + D are studied in the collision energy range 14.0–20.0 kcal/mol based on the potential energy surface 1[Formula: see text] state. Reaction probabilities, integral cross sections, the two angular distribution functions (concerning the initial/final velocity vector, and the product rotational momentum vector), and the product rotational alignment parameters are calculated as a function of the collision energy for the two reactions. The four generalized polarization dependent differential cross sections are presented to manifest the polarization characters. Also, the effect of the collision energy and the kinetic isotope effect are studied.
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Affiliation(s)
- Mei Hua Ge
- School of Physics, Shandong University, Jinan 250100, China
- School of Physics, Shandong University, Jinan 250100, China
| | - Huan Yang
- School of Physics, Shandong University, Jinan 250100, China
- School of Physics, Shandong University, Jinan 250100, China
| | - Yujun Zheng
- School of Physics, Shandong University, Jinan 250100, China
- School of Physics, Shandong University, Jinan 250100, China
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9
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Kesharwani MK, Brauer B, Martin JML. Frequency and Zero-Point Vibrational Energy Scale Factors for Double-Hybrid Density Functionals (and Other Selected Methods): Can Anharmonic Force Fields Be Avoided? J Phys Chem A 2014; 119:1701-14. [DOI: 10.1021/jp508422u] [Citation(s) in RCA: 349] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Manoj K. Kesharwani
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Reḥovot, Israel
| | - Brina Brauer
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Reḥovot, Israel
| | - Jan M. L. Martin
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Reḥovot, Israel
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10
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Martin JML, Kesharwani MK. Assessment of CCSD(T)-F12 Approximations and Basis Sets for Harmonic Vibrational Frequencies. J Chem Theory Comput 2014; 10:2085-90. [DOI: 10.1021/ct500174q] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jan M. L. Martin
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Reh̲ovot, Israel
| | - Manoj K. Kesharwani
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Reh̲ovot, Israel
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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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12
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Lu R, Xu Z, Wang Y. Reagent vibrational, rotational and isotopic effects on stereodynamics of the H + OCl → OH + Cl reaction. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633614500023] [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 quasi-classical trajectory method has been employed to investigate the initial vibrational and rotational effects of the title reaction on an improved ab initio potential energy surface for the 11A′ state. Meanwhile, isotopic effect has also been studied at collision energy of 19 kcal/mol. The product rotational alignment factor 〈P2(j′ • k)〉, angular distributions of P(ϕr), P(θr) and the generalized polarization dependent differential cross-sections have been calculated. The- results show that the reagent vibrational excitation generally strengthens the product alignment perpendicular to the reagent relative velocity vector k and affects the product scattering preference, and the rotational excitation has the same trend from j = 0 to 2 except for the higher excitation of j = 3. Further, the substitution of atom H with D leads to a stronger product alignment while changes some stereodynamical properties subtly.
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Affiliation(s)
- Ruifeng Lu
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Zhenyu Xu
- School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yunhui Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
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13
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Ge M, Yang H, Zheng Y. The dynamical study of O(1D) + HCl(v = 0, j = 0) reaction at hyperthermal collision energies. Chem Cent J 2013; 7:177. [PMID: 24237765 PMCID: PMC4176982 DOI: 10.1186/1752-153x-7-177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Accepted: 11/07/2013] [Indexed: 11/21/2022] Open
Abstract
Backgrounds The quasi-classical trajectory calculations for O(1D) + HCl → OH + Cl (R1) and O(1D) + HCl → ClO + H (R2) reactions have been performed at hyperthermal collision energies (60.0, 90.0, and 120.0 kal/mol) on the 1A' state. Reaction probabilities and integral cross sections are calculated. The product rotational distributions for the two channels, and the product rotational alignment parameters are investigated. Also, the alignment and the orientation of the products have been predicted through the angular distribution functions (concerning the initial/final velocity vector, and the product rotational angular momentum vector). To have a deeper understanding of the natures of the vector correlation between reagent and product relative velocities, a natural generalization of the differential cross section __PDDCS00, is calculated. Results The OH + Cl channel is the main product channel and is observed to have essentially isotropic rotational distributions. The ClO + H channel is found to be clearly rotationally polarized. Conclusions The dynamical, especially the stereodynamical characters are quite different for the two channels of the title reaction. Most reactions occur directly, except for R2 reaction at the collision energies of 60.0 and 120.0 kcal/mol. The alignment and orientation effects are weak/strong for R1/R2 reaction. The well structure on the potential energy surface and hyperthermal collision energies might result in the dynamical effects.
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Affiliation(s)
- Meihua Ge
- School of Physics, Shandong University, Jinan 250100, China.
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Affiliation(s)
- Tamás Szidarovszky
- Laboratory of Molecular Structure and Dynamics, Institute of Chemistry, Eötvös University , H-1518, Budapest 112, P.O. Box 32, Hungary
| | - Attila G. Császár
- Laboratory of Molecular Structure and Dynamics, Institute of Chemistry, Eötvös University , H-1518, Budapest 112, P.O. Box 32, Hungary
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15
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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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16
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WEI QIANG, XIE YINGKE, FENG WENLIN. THEORETICAL STUDY OF THE STEREO-DYNAMICS OF THE REACTION O + HCl → ClO + H. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633611006232] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Quasi-classical trajectory (QCT) method is used to study the stereo-dynamics of the title reaction on the ground 1 1A′ potential energy surface (PES). Differential cross-sections (DCSs) and alignments of the product rotational angular momentum for the reaction are reported. The influence of collision energy on the product vector properties is also studied in the present work. The distribution of angle between k and j′, P(θr), the distribution of dihedral angle denoting k-k′-j′ correlation, P(ϕr) ⋅ (2π/σ)( d σ00/ d ωt), (2π/σ)( d σ20/ d ωt), (2π/σ)( d σ22+/ d ωt) and (2π/σ)(dσ21-/dωt) have been calculated in the center of mass frame, respectively.
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Affiliation(s)
- QIANG WEI
- Department of Applied Physics, Chongqing University of Technology, Chongqing 400050, P. R. China
| | - YING KE XIE
- Department of Applied Physics, Chongqing University of Technology, Chongqing 400050, P. R. China
| | - WEN LIN FENG
- Department of Applied Physics, Chongqing University of Technology, Chongqing 400050, P. R. China
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NANBU SHINKOH, AOYAGI MUTSUMI, KAMISAKA HIDEYUKI, NAKAMURA HIROKI, BIAN WENSHENG, TANAKA KYOSHI. CHEMICAL REACTIONS IN THE O(1D) + HCl SYSTEM I. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633602000191] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
New global ab initio potential energy surfaces (PES) are presented for the low-lying 11A′, 11A′′ and 21A′ electronic states which are correlated to O (1D) + HCl . These potential energy surfaces are computed by using the multi-reference configuration interaction method with the Davidson correction (MRCI+Q). The reference functions are constructed by the complete active space self-consistent field (CASSCF) calculations using the quadruple zeta + polarization basis set augmented with diffuse functions. The computations are carried out at about 5000 molecular conformations on each three-dimensional potential energy surface. The high accuracy of the computations is confirmed by a comparison with the available most accurate data for the ground state 11A′; thus the present work is the first report of the accurate potential energy surfaces for the two excited states. Three low-lying transition states on the excited surfaces, two (TS2 and TS4) on 11A′′ and one (TS3) on 21A′, are found. Since TS2 and TS3 are as low as 0.07 eV and 0.28 eV, respectively, and correlate to the OH (2Π) + Cl (2P) product, these excited surfaces are expected to play quite important roles in the reaction dynamics. Possible effects of nonadiabatic couplings among the three PESs are also briefy discussed, although the nonadiabatic couplings have not yet been estimated. The quantum reaction dynamics on these three PESs are discussed in the second accompanying paper, Paper II.
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Affiliation(s)
- SHINKOH NANBU
- Research Center for Computational Science, Okazaki National Research Institutes, Myodaiji Okazaki 444-8585, Japan
| | - MUTSUMI AOYAGI
- Research Center for Computational Science, Okazaki National Research Institutes, Myodaiji Okazaki 444-8585, Japan
| | - HIDEYUKI KAMISAKA
- Department of Functional Molecular Science, The Graduate University for Advanced Studies, Myodaiji Okazaki 444-8585, Japan
| | - HIROKI NAKAMURA
- Department of Functional Molecular Science, The Graduate University for Advanced Studies, Myodaiji Okazaki 444-8585, Japan
- Department of Theoretical Studies, Institute for Molecular Science, Myodaiji Okazaki 444-8585, Japan
| | - WENSHENG BIAN
- Department of Theoretical Studies, Institute for Molecular Science, Myodaiji Okazaki 444-8585, Japan
| | - KYOSHI TANAKA
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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KAMISAKA HIDEYUKI, NAKAMURA HIROKI, NANBU SHINKOH, AOYAGI MUTSUMI, BIAN WENSHENG, TANAKA KIYOSHI. CHEMICAL REACTIONS IN THE O(1D) + HCl SYSTEM II. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633602000208] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Using the accurate global potential energy surfaces for the 11A′, 11A′′, and 21A′ states reported in the previous sister Paper I, detailed quantum dynamics calculations are performed for these three adiabatic surfaces separately for J = 0 (J: total angular momentum quantum number). Overall reaction probabilities for O + HCl → OH + Cl and H + ClO, the branching ratio between the two reactions, effects of the initial rovibrational excitation, and product rovibrational distributions are evaluated in the total energy region E tot ≤ 0.9 eV. Significant contributions to the overall reaction dynamics are found from the two excited 11A′′ and 21A′ potential energy surfaces, clearly indicating the insufficiency of the dynamics only on the ground 11A′ surface. The detailed dynamics on the excited surfaces are reported in the third paper of this series.
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Affiliation(s)
- HIDEYUKI KAMISAKA
- Department of Functional Molecular Science, School of Mathematical and Physical Science, The Graduate University for Advanced Studies, Myodaiji, Okazaki 444–8585, Japan
| | - HIROKI NAKAMURA
- Department of Functional Molecular Science, School of Mathematical and Physical Science, The Graduate University for Advanced Studies, Myodaiji, Okazaki 444–8585, Japan
- Department of Theoretical Studies, Institute for Molecular Science, Myodaiji, Okazaki 444–8585, Japan
| | - SHINKOH NANBU
- Research Center for Computational Science, Okazaki National Research Institutes, Myodaiji, Okazaki 444–8585, Japan
| | - MUTSUMI AOYAGI
- Research Center for Computational Science, Okazaki National Research Institutes, Myodaiji, Okazaki 444–8585, Japan
| | - WENSHENG BIAN
- Department of Theoretical Studies, Institute for Molecular Science, Myodaiji, Okazaki 444–8585, Japan
| | - KIYOSHI TANAKA
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060–0810, Japan
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Ge MH, Zheng YJ. Effect of ro-vibrational excitation of HCl on the stereodynamics for the reaction of O(3P)+HCl→OH+Cl. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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20
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YANG HUAN, HAN KELI, NANBU SHINKOH, BALINT-KURTI GABRIELG, ZHANG HONG, SMITH SEANC, HANKEL MARLIES. INITIAL ROTATIONAL QUANTUM STATE EXCITATION AND ISOTOPIC EFFECTS FOR THE O(1D)+HCl → OH+Cl (OCl+H) REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633609005209] [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
We present reaction probabilities, branching ratios and vibrational product quantum state distributions for the reaction O (1D)+ HCl → OH+Cl (OCl+H) , Boltzmann averaged over initial rotational quantum states at a temperature of 300 K and also for the deuterium isotopic variant. The quantum scattering dynamics are performed using the potential energy surfaces for all three contributing electronic states. Comparisons are presented with results computed using only the ground electronic state potential energy surface, with results computed using only the j = 0 initial rotational state and also with results obtained using an equal weighting for the lowest 10 rotational states. Inclusion of the higher initial rotational states significantly changes the form of the reaction probability as a function of collision energy, reducing the threshold for reaction on the 1A" and 2A' excited electronic states. We found that the combined inclusion of higher initial rotational states and all three contributing electronic states is crucial for obtaining a branching ratio that is within the range and trend given by experiment from our J = 0 calculations. Isotopic effects range from tunnelling effects for the hydrogen variant and enhancement of reactivity for the production of OD on the excited electronic states.
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Affiliation(s)
- HUAN YANG
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - KE-LI HAN
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - SHINKOH NANBU
- Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan
| | | | - HONG ZHANG
- Centre for Computational Molecular Science, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072, Australia
| | - SEAN C. SMITH
- Centre for Computational Molecular Science, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072, Australia
| | - MARLIES HANKEL
- Centre for Computational Molecular Science, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072, Australia
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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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BIAN WENSHENG, POIRIER BILL. ACCURATE AND HIGHLY EFFICIENT CALCULATION OF THE O(1D)HCl VIBRATIONAL BOUND STATES, USING A COMBINATION OF METHODS. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633603000768] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Hypochlorous acid, HOCl, is an important intermediate in the O (1D) HCl reactive system. Due in part to a large number of vibrational bound states (over 800), extremely large direct product basis sets (around 300,000) are required to compute the energy levels just below the dissociation threshold. This situation, combined with a very high density of states, results in difficult convergence for iterative methods — e.g. Lanczos requires 50,000 iterations, and filter diagonalization uses 60,000 iterations. In contrast, using new methodologies, we are able to compute the highest-lying bound states with only 271 iterations, although the CPU cost per iteration is substantially greater. Lower lying states are also computed, for a fraction of the CPU cost of the highest energy calculation.
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Affiliation(s)
- WENSHENG BIAN
- Department of Chemistry and Biochemistry, and Department of Physics, Texas Tech University, Box 41061, Lubbock, Texas 79409-1061, USA
| | - BILL POIRIER
- Department of Chemistry and Biochemistry, and Department of Physics, Texas Tech University, Box 41061, Lubbock, Texas 79409-1061, USA
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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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24
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Ge MH, Zheng YJ. Stereo-dynamics study of O + HCl → OH + Cl reaction on the 3A″, 3A′, and 1A′ states. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0917-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Bargueño P, Jambrina PG, Alvariño JM, Hernández ML, Aoiz FJ, Menéndez M, Verdasco E, González-Lezana T. The dynamics of the O(1D) + HCl --> OH + Cl reaction at a 0.26 eV collision energy: a comparison between theory and experiment. J Phys Chem A 2010; 113:14237-50. [PMID: 20028155 DOI: 10.1021/jp902336s] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dynamics of the O((1)D) + HCl(v = 0, j = 0) --> Cl + OH reaction at a 0.26 eV collision energy has been investigated by means of a quasiclassical trajectory (QCT) and statistical quantum and quasiclassical methods. State-resolved cross sections and Cl atom velocity distributions have been calculated on two different potential energy surfaces (PESs): the H2 surface (Martinez et al. Phys. Chem. Chem. Phys. 2000, 2, 589) and the latest surface by Peterson, Bowman, and co-workers (PSB2) (J. Chem. Phys. 2000, 113, 6186). The comparison with recent experimental results reveals that the PSB2 PES manages to describe correctly differential cross sections and the velocity distributions of the departing Cl atom. The calculations on the H2 PES seem to overestimate the OH scattering in the forward direction and the fraction of Cl at high recoil velocities. Although the comparison of the corresponding angular distributions is not bad, significant deviations with a statistical description are found, thus ruling out a complex-forming mechanism as the dominant reaction pathway. However, for the ClO + H product channel, the QCT and statistical predictions are found to be in good agreement.
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Affiliation(s)
- P Bargueño
- Departamento de Química Física, Universidad de Salamanca, 37008 Salamanca, Spain
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26
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Wei Q, Wu VWK. Quasiclassical trajectory calculations of the isotopic effect on cross-sections of reactions O(1D) + HCl (DCl, TCl). Mol Phys 2009. [DOI: 10.1080/00268970902933838] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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27
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Vaida V. Spectroscopy of Photoreactive Systems: Implications for Atmospheric Chemistry. J Phys Chem A 2008; 113:5-18. [DOI: 10.1021/jp806365r] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Veronica Vaida
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309
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28
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Yang H, Han KL, Nanbu S, Nakamura H, Balint-Kurti GG, Zhang H, Smith SC, Hankel M. Quantum Mechanical Calculation of Energy Dependence of OCl/OH Product Branching Ratio and Product Quantum State Distributions for the O(1D) + HCl Reaction on All Three Contributing Electronic State Potential Energy Surfaces. J Phys Chem A 2008; 112:7947-60. [DOI: 10.1021/jp803673y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huan Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Ke-Li Han
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Shinkoh Nanbu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Hiroki Nakamura
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Gabriel G. Balint-Kurti
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Hong Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Sean C. Smith
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
| | - Marlies Hankel
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku Fukuoka 812-8581, Japan, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom, and Centre for Computational Molecular Science, Australian Institute for Bioengineering and
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29
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Zhang H, Hankel M, Smith SC, Nanbu S, Nakamura H. Quantum Calculation of Ro-vibrational States: Methodology and DOCl Application Results. J Phys Chem A 2008; 112:4141-7. [DOI: 10.1021/jp8000114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong Zhang
- Centre for Computational Molecular Science, AIBN Building (#75), The University of Queensland, Qld 4072, Brisbane, Australia
| | - Marlies Hankel
- Centre for Computational Molecular Science, AIBN Building (#75), The University of Queensland, Qld 4072, Brisbane, Australia
| | - Sean C. Smith
- Centre for Computational Molecular Science, AIBN Building (#75), The University of Queensland, Qld 4072, Brisbane, Australia
| | - Shinkoh Nanbu
- Research Institute for Information Technology, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Hiroki Nakamura
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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31
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Yang H, Han KL, Nanbu S, Nakamura H, Balint-Kurti GG, Zhang H, Smith SC, Hankel M. Quantum dynamical study of the O(D1)+HCl reaction employing three electronic state potential energy surfaces. J Chem Phys 2008; 128:014308. [DOI: 10.1063/1.2813414] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Ma H, Liu X, Bian W, Meng L, Zheng S. A theoretical study of the mechanism and kinetics of F+N3 reactions. Chemphyschem 2006; 7:1786-94. [PMID: 16888750 DOI: 10.1002/cphc.200600183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Both the singlet(1A') and triplet(3A'') potential energy surfaces (PESs) of F+N(3) reactions are investigated using the complete-active-space self-consistent field (CASSCF) and the multireference configuration interaction (MRCI) methods with a proper active space. The minimum energy crossing point (MECP) at the intersection seam between the 1A' and 3A'' PESs is located and used to clarify the reaction mechanisms. Two triplet transition states are found, with one in the cis form and the other one in the trans form. Further kinetic calculations are performed with the canonical unified statistical (CUS) theory on the singlet PES and the improved canonical variational transition-state (ICVT) method on the triplet PES. The rate constants are also reported. At 298 K, the calculated rate constant is in reasonably good agreement with experimental values, and spin-orbit coupling effects lower it by 28 %. The spectroscopic constants derived from the fitted potential-energy curves for the singlet and triplet states of NF are in very good agreement with experimental values. Our calculations indicate that the adiabatic reaction on the singlet PES leading to NF(a(1)Delta)+N(2) is the major channel, whereas the nonadiabatic reaction through the MECP, which leads to NF(X(3)Sigma(-))+N(2), is a minor channel.
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Affiliation(s)
- Haitao Ma
- Beijing National Laboratory for Molecular Sciences, The State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
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33
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Zhang H, Smith SC, Nanbu S, Nakamura H. HOCl Ro-Vibrational Bound-State Calculations for Nonzero Total Angular Momentum. J Phys Chem A 2006; 110:5468-74. [PMID: 16623477 DOI: 10.1021/jp058286n] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Lanczos homogeneous filter diagonalization method has been employed to compute the HOCl ro-vibrational states for a range of total angular momenta (J = 0, 1, 5, 10, 11, 20, 30) on a newly developed ab initio potential energy surface by Nanbu et al. (J. Theor. Comput. Chem. 2002, 1, 263). For such computationally challenging calculations, a parallel computing strategy has been incorporated into our method to perform the matrix-vector multiplications. For the computed low bound states, a spectroscopic assignment has been made and the widely used approximate adiabatic rotation method has been tested for the broad range of total angular momenta for this deep-well system. Comparison of experimental results with exact quantum mechanical calculations for the selected far-infrared transitions involving the range of total angular momenta has been made possible for the first time.
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Affiliation(s)
- Hong Zhang
- Centre for Computational Molecular Science, Chemistry Building (#68), The University of Queensland, Qld 4072, Brisbane, Australia
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34
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Bian W, Poirier B. Accurate and highly efficient calculation of the highly excited pure OH stretching resonances of O(1D)HCl, using a combination of methods. J Chem Phys 2004; 121:4467-78. [PMID: 15332876 DOI: 10.1063/1.1779577] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Accurate calculation of the energies and widths of the resonances of HOCl--an important intermediate in the O(1D)HCl reactive system--poses a challenging benchmark for computational methods. The need for very large direct product basis sets, combined with an extremely high density of states, results in difficult convergence for iterative methods. A recent calculation of the highly excited OH stretch mode resonances using the filter diagonalization method, for example, required 462,000 basis functions, and 180,000 iterations. In contrast, using a combination of new methods, we are able to compute the same resonance states to higher accuracy with a basis less than half the size, using only a few hundred iterations-although the CPU cost per iteration is substantially greater. Similar performance enhancements are observed for calculations of the high-lying bound states, as reported in a previous paper [J. Theo. Comput. Chem. 2, 583 (2003)].
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Affiliation(s)
- Wensheng Bian
- Department of Chemistry and Biochemistry and Department of Physics, Texas Tech University, Lubbock, Texas 79409-1061, USA
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35
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Tang BY, Tang QK, Chen MD, Han KL, Zhang JZH. Quantum scattering calculation of the O(1D)+HBr reaction. J Chem Phys 2004; 120:8537-43. [PMID: 15267780 DOI: 10.1063/1.1689956] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional time-dependent quantum wave packet calculation for the O((1)D)+HBr reaction has been carried out using an accurate ab initio global potential energy surface [K. A. Peterson, J. Chem. Phys. 113, 4598 (2000)]. The calculations show that the initial state-selected reaction probabilities are dominated by resonance structures, and the lifetime of the resonance is generally in the subpicosecond time scale. The energy dependence of the reaction cross section is computed, which manifests still resonance structures, and is a decreasing function of the translational energy. The thermal rate constants are also computed, which are nearly independent on the temperature. The calculation results are discussed and compared to similar reaction with deep well.
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Affiliation(s)
- Bi-Yu Tang
- Department of Physics, Xiangtan University, Hunan Province, 411105, China.
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36
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Barone V. Vibrational zero-point energies and thermodynamic functions beyond the harmonic approximation. J Chem Phys 2004; 120:3059-65. [PMID: 15268458 DOI: 10.1063/1.1637580] [Citation(s) in RCA: 457] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This paper compares harmonic and anharmonic zero-point energies and thermodynamic functions for a number of molecules of small and medium size. Anharmonic corrections cannot be neglected for quantitative studies, but can be obtained quite effectively by a perturbative treatment including cubic force constants to the second order and semidiagonal quartic constants to the first order. Simple finite difference equations provide all the necessary terms by at most 6N-11 Hessian evaluations, where N is the number of atoms in the system. Accurate values are obtained by this method using the Becke three parameter Lee-Yang-Parr functional, medium size basis sets, and, when needed, proper treatment of internal rotations. The whole model has been completely automated in the Gaussian package.
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Affiliation(s)
- Vincenzo Barone
- Laboratorio di Struttura e Dinamica Molecolare, Dipartimento di Chimica, Universita "Federico II," Complesso Universitario Monte Sant' Angelo, Via Cintia, I-80126 Napoli, Italy.
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37
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Martı́nez T, Hernández ML, Alvariño JM, Aoiz FJ, Sáez Rábanos V. A detailed study of the dynamics of the O(1D)+HCl→OH+Cl, ClO+H reactions. J Chem Phys 2003. [DOI: 10.1063/1.1607317] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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38
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Ramachandran B, Vegesna NS, Peterson KA. Effects of Electron Correlation and Scalar Relativistic Corrections on the Thermochemical and Spectroscopic Properties of HOF. J Phys Chem A 2003. [DOI: 10.1021/jp035266h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- B. Ramachandran
- Chemistry, College of Engineering and Science, Louisiana Tech University, Ruston, Louisiana 71272, and Department of Chemistry, Washington State University, Pullman, Washington 99164-4630
| | - Naga Srivani Vegesna
- Chemistry, College of Engineering and Science, Louisiana Tech University, Ruston, Louisiana 71272, and Department of Chemistry, Washington State University, Pullman, Washington 99164-4630
| | - Kirk A. Peterson
- Chemistry, College of Engineering and Science, Louisiana Tech University, Ruston, Louisiana 71272, and Department of Chemistry, Washington State University, Pullman, Washington 99164-4630
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39
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Dayou F, Spielfiedel A. Ab initio calculation of the ground (1A′) potential energy surface and theoretical rate constant for the Si+O2→SiO+O reaction. J Chem Phys 2003. [DOI: 10.1063/1.1594172] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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40
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Ruden TA, Taylor PR, Helgaker T. Automated calculation of fundamental frequencies: Application to AlH3 using the coupled-cluster singles-and-doubles with perturbative triples method. J Chem Phys 2003. [DOI: 10.1063/1.1583671] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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41
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Azzam T, Schinke R, Farantos SC, Joyeux M, Peterson KA. The bound state spectrum of HOBr up to the dissociation limit: Evolution of saddle-node bifurcations. J Chem Phys 2003. [DOI: 10.1063/1.1569914] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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42
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Abstract
This review discusses recent quantum scattering calculations on bimolecular chemical reactions in the gas phase. This theory provides detailed and accurate predictions on the dynamics and kinetics of reactions containing three atoms. In addition, the method can now be applied to reactions involving polyatomic molecules. Results obtained with both time-independent and time-dependent quantum dynamical methods are described. The review emphasises the recent development in time-dependent wave packet theories and the applications of reduced dimensionality approaches for treating polyatomic reactions. Calculations on over 40 different reactions are described.
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43
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Grebenshchikov S, Schinke R, Hase W. State-specific dynamics of unimolecular dissociation. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0069-8040(03)80005-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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44
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Pawłowski F, Halkier A, Jørgensen P, Bak KL, Helgaker T, Klopper W. Accuracy of spectroscopic constants of diatomic molecules from ab initio calculations. J Chem Phys 2003. [DOI: 10.1063/1.1533032] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Mussa HY, Tennyson J. Calculating quasi-bound rotation-vibrational states of HOCl using massively parallel computers. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01554-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Hsiao CC, Lee YP, Wang NS, Wang JH, Lin MC. Experimental and Theoretical Studies of the Rate Coefficients of the Reaction O(3P) + HCl at High Temperatures. J Phys Chem A 2002. [DOI: 10.1021/jp020916n] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Niann S. Wang
- Department of Applied Chemistry, National Chiao Tung University, 1001, Ta Hsueh Road, Hsinchu 30010, Taiwan
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47
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Song K, Sun L, Hase WL, Grebenshchikov SY, Schinke R. Relationship between Mode Specific and Thermal Unimolecular Rate Constants for HOCl → OH + Cl Dissociation. J Phys Chem A 2002. [DOI: 10.1021/jp014689l] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Reiche F, Abel B, Beck RD, Rizzo TR. Double-resonance overtone photofragment spectroscopy oftrans-HONO. II. State- and time-resolved dissociation and OH-product state distributions. J Chem Phys 2002. [DOI: 10.1063/1.1471236] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Levchenko SV, Krylov AI. Electronic Structure of Halogen-Substituted Methyl Radicals: Equilibrium Geometries and Vibrational Spectra of CH2Cl and CH2F. J Phys Chem A 2002. [DOI: 10.1021/jp020275w] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sergey V. Levchenko
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
| | - Anna I. Krylov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
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50
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Drougas E, Papayannis D, Kosmas A. Quantum mechanical and RRKM studies of the reactions CH3+ClO→CH3O+Cl and CH3O+Cl→HCHO+HCl. Chem Phys 2002. [DOI: 10.1016/s0301-0104(01)00548-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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