551
|
Godtliebsen IH, Thomsen B, Christiansen O. Tensor Decomposition and Vibrational Coupled Cluster Theory. J Phys Chem A 2013; 117:7267-79. [DOI: 10.1021/jp401153q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Bo Thomsen
- Department of Chemistry, Aarhus University, Aarhus, Denmark
| | | |
Collapse
|
552
|
Wittenbrink N, Ndome H, Eisfeld W. Toward spin-orbit coupled diabatic potential energy surfaces for methyl iodide using effective relativistic coupling by asymptotic representation. J Phys Chem A 2013; 117:7408-20. [PMID: 23590710 DOI: 10.1021/jp401438x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The theoretical treatment of state-state interactions and the development of coupled multidimensional potential energy surfaces (PESs) is of fundamental importance for the theoretical investigation of nonadiabatic processes. Usually, only derivative or vibronic coupling is considered, but the presence of heavy atoms in a system can render spin-orbit (SO) coupling important as well. In the present study, we apply a new method recently developed by us (J. Chem. Phys. 2012, 136, 034103, and J. Chem. Phys. 2012, 137, 064101) to generate SO coupled diabatic PESs along the C-I dissociation coordinate for methyl iodide (CH3I). This is the first and mandatory step toward the development of fully coupled full-dimensional PESs to describe the multistate photodynamics of this benchmark system. The method we use here is based on the diabatic asymptotic representation of the molecular fine structure states and an effective relativistic coupling operator. It therefore is called effective relativistic coupling by asymptotic representation (ERCAR). This approach allows the efficient and accurate generation of fully coupled PESs including derivative and SO coupling based on high-level ab initio calculations. In this study we develop a specific ERCAR model for CH3I that so far accounts only for the C-I bond cleavage. Details of the diabatization and the accuracy of the results are investigated in comparison to reference ab initio calculations and experiments. The energies of the adiabatic fine structure states are reproduced in excellent agreement with ab initio SO-CI data. The model is also compared to available literature data, and its performance is evaluated critically. This shows that the new method is very promising for the construction of fully coupled full-dimensional PESs for CH3I to be used in future quantum dynamics studies.
Collapse
Affiliation(s)
- Nils Wittenbrink
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | | | | |
Collapse
|
553
|
Morawietz T, Behler J. A density-functional theory-based neural network potential for water clusters including van der Waals corrections. J Phys Chem A 2013; 117:7356-66. [PMID: 23557541 DOI: 10.1021/jp401225b] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The fundamental importance of water for many chemical processes has motivated the development of countless efficient but approximate water potentials for large-scale molecular dynamics simulations, from simple empirical force fields to very sophisticated flexible water models. Accurate and generally applicable water potentials should fulfill a number of requirements. They should have a quality close to quantum chemical methods, they should explicitly depend on all degrees of freedom including all relevant many-body interactions, and they should be able to describe molecular dissociation and recombination. In this work, we present a high-dimensional neural network (NN) potential for water clusters based on density-functional theory (DFT) calculations, which is constructed using clusters containing up to 10 monomers and is in principle able to meet all these requirements. We investigate the reliability of specific parametrizations employing two frequently used generalized gradient approximation (GGA) exchange-correlation functionals, PBE and RPBE, as reference methods. We find that the binding energy errors of the NN potentials with respect to DFT are significantly lower than the typical uncertainties of DFT calculations arising from the choice of the exchange-correlation functional. Further, we examine the role of van der Waals interactions, which are not properly described by GGA functionals. Specifically, we incorporate the D3 scheme suggested by Grimme (J. Chem. Phys. 2010, 132, 154104) in our potentials and demonstrate that it can be applied to GGA-based NN potentials in the same way as to DFT calculations without modification. Our results show that the description of small water clusters provided by the RPBE functional is significantly improved if van der Waals interactions are included, while in case of the PBE functional, which is well-known to yield stronger binding than RPBE, van der Waals corrections lead to overestimated binding energies.
Collapse
Affiliation(s)
- Tobias Morawietz
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | | |
Collapse
|
554
|
Welsch R, Manthe U. Fast Shepard interpolation on graphics processing units: Potential energy surfaces and dynamics for H + CH4 → H2 + CH3. J Chem Phys 2013; 138:164118. [DOI: 10.1063/1.4802059] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
555
|
Ayouz M, Babikov D. Global permutationally invariant potential energy surface for ozone forming reaction. J Chem Phys 2013; 138:164311. [DOI: 10.1063/1.4799915] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
|
556
|
Varandas AJC. Accurate combined-hyperbolic-inverse-power-representation of ab initio potential energy surface for the hydroperoxyl radical and dynamics study of O+OH reaction. J Chem Phys 2013; 138:134117. [DOI: 10.1063/1.4795826] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
557
|
Czakó G. Accurate ab initio potential energy surface, thermochemistry, and dynamics of the Br(2P, 2P3/2) + CH4 → HBr + CH3 reaction. J Chem Phys 2013; 138:134301. [DOI: 10.1063/1.4797467] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
|
558
|
Bhattacharyya S, Opalka D, Poluyanov LV, Domcke W. Jahn-Teller theory beyond the standard model. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/428/1/012015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
559
|
Mancini JS, Bowman JM. Communication: A new ab initio potential energy surface for HCl–H2O, diffusion Monte Carlo calculations of D0 and a delocalized zero-point wavefunction. J Chem Phys 2013; 138:121102. [DOI: 10.1063/1.4799231] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
560
|
Affiliation(s)
- Andrew S. Petit
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United
States
| | - Anne B. McCoy
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United
States
| |
Collapse
|
561
|
Roberts MA, Sharp-Williams EN, Nesbitt DJ. High-Resolution Direct-Absorption Spectroscopy of Hydroxymethyl Radical in the CH Symmetric Stretching Region. J Phys Chem A 2013; 117:7042-9. [DOI: 10.1021/jp312877k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Melanie A. Roberts
- JILA, University of Colorado, National
Institute of
Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United
States
| | - Erin N. Sharp-Williams
- JILA, University of Colorado, National
Institute of
Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United
States
| | - David J. Nesbitt
- JILA, University of Colorado, National
Institute of
Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United
States
| |
Collapse
|
562
|
Hele TJH, Althorpe SC. Derivation of a true (t → 0+) quantum transition-state theory. I. Uniqueness and equivalence to ring-polymer molecular dynamics transition-state-theory. J Chem Phys 2013; 138:084108. [DOI: 10.1063/1.4792697] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
563
|
Braunstein M, Conforti PF. Classical dynamics of state-resolved hyperthermal O(3P) + H2O(1A1) collisions. J Chem Phys 2013; 138:074303. [DOI: 10.1063/1.4790589] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
564
|
Xiao H, Maeda S, Morokuma K. CASPT2 Study of Photodissociation Pathways of Ketene. J Phys Chem A 2013; 117:7001-8. [DOI: 10.1021/jp312719a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongyan Xiao
- Fukui Institute for
Fundamental
Chemistry, Kyoto University, 34-4 Takano
Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Satoshi Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Keiji Morokuma
- Fukui Institute for
Fundamental
Chemistry, Kyoto University, 34-4 Takano
Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
- Cherry L. Emerson Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
565
|
Varandas AJC. Combined-hyperbolic-inverse-power-representation of potential energy surfaces: A preliminary assessment for H3 and HO2. J Chem Phys 2013; 138:054120. [DOI: 10.1063/1.4788912] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
566
|
Affiliation(s)
- Chen Qu
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia, USA
| | - Joel M. Bowman
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia, USA
| |
Collapse
|
567
|
Homayoon Z, Bowman JM. Quasiclassical trajectory study of CH3NO2 decomposition via roaming mediated isomerization using a global potential energy surface. J Phys Chem A 2013; 117:11665-72. [PMID: 23327612 DOI: 10.1021/jp312076z] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a global potential energy surface (PES) for CH3NO2 based on fitting roughly 114,000 density functional theory (UB3LYP/6-311+g(d,p)) electronic energies. The PES is a precise, permutationally invariant fit to these energies. Properties of the PES are described, as are some preliminary quasiclassical trajectory calculations. An isomerization-roaming pathway to the CH3ONO isomer and then to the CH3O + NO products is found. Although the pathway occurs at larger distances than a related loose saddle-point on the PES, the pathway supports the supposition of such a pathway based on locating a loose first-order saddle point and associated IRC, reported previously by Zhu and Lin [Zhu, R. S. and Lin, M. C. Chem. Phys. Lett. 2009, 478, 11].
Collapse
Affiliation(s)
- Zahra Homayoon
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
| | | |
Collapse
|
568
|
Jiang B, Li J, Xie D, Guo H. Effects of reactant internal excitation and orientation on dissociative chemisorption of H2O on Cu(111): Quasi-seven-dimensional quantum dynamics on a refined potential energy surface. J Chem Phys 2013; 138:044704. [DOI: 10.1063/1.4776770] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
569
|
Wang X, Bowman JM. Zero-point Energy is Needed in Molecular Dynamics Calculations to Access the Saddle Point for H+HCN→H2CN* and cis/trans-HCNH* on a New Potential Energy Surface. J Chem Theory Comput 2013; 9:901-8. [DOI: 10.1021/ct301022q] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohong Wang
- Cherry L. Emerson Center for Scientific Computation
and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Joel M. Bowman
- Cherry L. Emerson Center for Scientific Computation
and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
570
|
Fu B, Bowman JM, Xiao H, Maeda S, Morokuma K. Quasiclassical Trajectory Studies of the Photodissociation Dynamics of NO3 from the D0 and D1 Potential Energy Surfaces. J Chem Theory Comput 2013; 9:893-900. [DOI: 10.1021/ct3009792] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bina Fu
- Department
of Chemistry and Cherry L. Emerson Center for Scientific
Computation, Emory University, Atlanta,
Georgia 30322, United States
- State Key Laboratory of Molecular
Reaction Dynamics and Center for Theoretical and Computational Chemistry,
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic
of China
| | - Joel M. Bowman
- Department
of Chemistry and Cherry L. Emerson Center for Scientific
Computation, Emory University, Atlanta,
Georgia 30322, United States
| | - Hongyan Xiao
- Fukui Institute
for Fundamental
Chemistry, Kyoto University, Kyoto 606-8103,
Japan
| | - Satoshi Maeda
- Department
of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Keiji Morokuma
- Department
of Chemistry and Cherry L. Emerson Center for Scientific
Computation, Emory University, Atlanta,
Georgia 30322, United States
- Fukui Institute
for Fundamental
Chemistry, Kyoto University, Kyoto 606-8103,
Japan
| |
Collapse
|
571
|
Szabó I, Császár AG, Czakó G. Dynamics of the F− + CH3Cl → Cl− + CH3F SN2 reaction on a chemically accurate potential energy surface. Chem Sci 2013. [DOI: 10.1039/c3sc52157e] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
|
572
|
Roy TK, Gerber RB. Vibrational self-consistent field calculations for spectroscopy of biological molecules: new algorithmic developments and applications. Phys Chem Chem Phys 2013; 15:9468-92. [DOI: 10.1039/c3cp50739d] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
573
|
Welsch R, Manthe U. Reaction dynamics with the multi-layer multi-configurational time-dependent Hartree approach: H + CH4 → H2 + CH3 rate constants for different potentials. J Chem Phys 2012; 137:244106. [DOI: 10.1063/1.4772585] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
574
|
Fu B, Han YC, Bowman JM, Leonori F, Balucani N, Angelucci L, Occhiogrosso A, Petrucci R, Casavecchia P. Experimental and theoretical studies of the O(3P) + C2H4reaction dynamics: Collision energy dependence of branching ratios and extent of intersystem crossing. J Chem Phys 2012; 137:22A532. [DOI: 10.1063/1.4746758] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
575
|
Zhu X, Yarkony DR. Quasi-diabatic representations of adiabatic potential energy surfaces coupled by conical intersections including bond breaking: A more general construction procedure and an analysis of the diabatic representation. J Chem Phys 2012; 137:22A511. [DOI: 10.1063/1.4734315] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
576
|
Huang X, Fortenberry RC, Wang Y, Francisco JS, Crawford TD, Bowman JM, Lee TJ. Dipole Surface and Infrared Intensities for the cis- and trans-HOCO and DOCO Radicals. J Phys Chem A 2012. [DOI: 10.1021/jp3102546] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinchuan Huang
- SETI Institute, 189 Bernardo Avenue, Suite
100, Mountain View, California 94043,
United States
| | - Ryan C. Fortenberry
- NASA Ames Research Center, Moffett Field, California 94035-1000, United
States
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Yimin Wang
- Cherry L. Emerson
Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Joseph S. Francisco
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - T. Daniel Crawford
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Joel M. Bowman
- Cherry L. Emerson
Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Timothy J. Lee
- NASA Ames Research Center, Moffett Field, California 94035-1000, United
States
| |
Collapse
|
577
|
Wang Y, Carter S, Bowman JM. Variational Calculations of Vibrational Energies and IR Spectra of trans- and cis-HOCO Using New ab Initio Potential Energy and Dipole Moment Surfaces. J Phys Chem A 2012; 117:9343-52. [DOI: 10.1021/jp309911w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yimin Wang
- Cherry L.
Emerson Center for Scientific Computation
and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Stuart Carter
- Cherry L.
Emerson Center for Scientific Computation
and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Joel M. Bowman
- Cherry L.
Emerson Center for Scientific Computation
and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
578
|
Improved Potential Energy Surface of Ozone Constructed Using the Fitting by Permutationally Invariant Polynomial Function. ACTA ACUST UNITED AC 2012. [DOI: 10.1155/2012/951371] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
New global potential energy surface for the ground electronic state of ozone is constructed at the complete basis set level of the multireference configuration interaction theory. A method of fitting the data points by analytical permutationally invariant polynomial function is adopted. A small set of 500 points is preoptimized using the old surface of ozone. In this procedure the positions of points in the configuration space are chosen such that the RMS deviation of the fit is minimized. New ab initio calculations are carried out at these points and are used to build new surface. Additional points are added to the vicinity of the minimum energy path in order to improve accuracy of the fit, particularly in the region where the surface of ozone exhibits a shallow van der Waals well. New surface can be used to study formation of ozone at thermal energies and its spectroscopy near the dissociation threshold.
Collapse
|
579
|
Carter S, Sharma AR, Bowman JM. First-principles calculations of rovibrational energies, dipole transition intensities and partition function for ethylene using MULTIMODE. J Chem Phys 2012; 137:154301. [DOI: 10.1063/1.4758005] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
580
|
Barragán P, Prosmiti R, Wang Y, Bowman JM. Full-dimensional (15-dimensional) ab initio analytical potential energy surface for the H7+ cluster. J Chem Phys 2012; 136:224302. [PMID: 22713042 DOI: 10.1063/1.4726126] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Full-dimensional ab initio potential energy surface is constructed for the H(7)(+) cluster. The surface is a fit to roughly 160,000 interaction energies obtained with second-order MöllerPlesset perturbation theory and the cc-pVQZ basis set, using the invariant polynomial method [B. J. Braams and J. M. Bowman, Int. Rev. Phys. Chem. 28, 577 (2009)]. We employ permutationally invariant basis functions in Morse-type variables for all the internuclear distances to incorporate permutational symmetry with respect to interchange of H atoms into the representation of the surface. We describe how different configurations are selected in order to create the database of the interaction energies for the linear least squares fitting procedure. The root-mean-square error of the fit is 170 cm(-1) for the entire data set. The surface dissociates correctly to the H(5)(+) + H(2) fragments. A detailed analysis of its topology, as well as comparison with additional ab initio calculations, including harmonic frequencies, verify the quality and accuracy of the parameterized potential. This is the first attempt to present an analytical representation of the 15-dimensional surface of the H(7)(+) cluster for carrying out dynamics studies.
Collapse
Affiliation(s)
- Patricia Barragán
- Instituto de Física Fundamental, CSIC, Serrano 123, 28006 Madrid, Spain
| | | | | | | |
Collapse
|
581
|
Constructing Potential Energy Surfaces for Polyatomic Systems: Recent Progress and New Problems. ACTA ACUST UNITED AC 2012. [DOI: 10.1155/2012/164752] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Different methods of constructing potential energy surfaces in polyatomic systems are reviewed, with the emphasis put on fitting, interpolation, and analytical (defined by functional forms) approaches, based on quantum chemistry electronic structure calculations. The different approaches are reviewed first, followed by a comparison using the benchmark H + CH4 and the H + NH3 gas-phase hydrogen abstraction reactions. Different kinetics and dynamics properties are analyzed for these reactions and compared with the available experimental data, which permits one to estimate the advantages and disadvantages of each method. Finally, we analyze different problems with increasing difficulty in the potential energy construction: spin-orbit coupling, molecular size, and more complicated reactions with several maxima and minima, which test the soundness and general applicability of each method. We conclude that, although the field of small systems, typically atom-diatom, is mature, there still remains much work to be done in the field of polyatomic systems.
Collapse
|
582
|
Xie C, Li J, Xie D, Guo H. Quasi-classical trajectory study of the H + CO2 → HO + CO reaction on a new ab initio based potential energy surface. J Chem Phys 2012; 137:024308. [DOI: 10.1063/1.4733334] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
583
|
Zhu X, Ma J, Yarkony DR, Guo H. Computational determination of theÃstate absorption spectrum of NH3and of ND3using a new quasi-diabatic representation of the X̃ andÃstates and full six-dimensional quantum dynamics. J Chem Phys 2012; 136:234301. [DOI: 10.1063/1.4725496] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
584
|
Fu B, Han YC, Bowman JM, Angelucci L, Balucani N, Leonori F, Casavecchia P. Intersystem crossing and dynamics in O(3P) + C2H4 multichannel reaction: experiment validates theory. Proc Natl Acad Sci U S A 2012; 109:9733-8. [PMID: 22665777 PMCID: PMC3382527 DOI: 10.1073/pnas.1202672109] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The O((3)P) + C(2)H(4) reaction, of importance in combustion and atmospheric chemistry, stands out as a paradigm reaction involving triplet- and singlet-state potential energy surfaces (PESs) interconnected by intersystem crossing (ISC). This reaction poses challenges for theory and experiments owing to the ruggedness and high dimensionality of these potentials, as well as the long lifetimes of the collision complexes. Primary products from five competing channels (H + CH(2)CHO, H + CH(3)CO, H(2) + CH(2)CO, CH(3) + HCO, CH(2) + CH(2)O) and branching ratios (BRs) are determined in crossed molecular beam experiments with soft electron-ionization mass-spectrometric detection at a collision energy of 8.4 kcal/mol. As some of the observed products can only be formed via ISC from triplet to singlet PESs, from the product BRs the extent of ISC is inferred. A new full-dimensional PES for the triplet state as well as spin-orbit coupling to the singlet PES are reported, and roughly half a million surface hopping trajectories are run on the coupled singlet-triplet PESs to compare with the experimental BRs and differential cross-sections. Both theory and experiment find almost equal contributions from the two PESs to the reaction, posing the question of how important is it to consider the ISC as one of the nonadiabatic effects for this and similar systems involved in combustion chemistry. Detailed comparisons at the level of angular and translational energy distributions between theory and experiment are presented for the two primary channel products, CH(3) + HCO and H + CH(2)CHO. The agreement between experimental and theoretical functions is excellent, implying that theory has reached the capability of describing complex multichannel nonadiabatic reactions.
Collapse
Affiliation(s)
- Bina Fu
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, GA 30322; and
| | - Yong-Chang Han
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, GA 30322; and
| | - Joel M. Bowman
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, GA 30322; and
| | - Luca Angelucci
- Dipartimento di Chimica—Università degli Studi di Perugia Via Elce di Sotto, 8-06123 Perugia, Italy
| | - Nadia Balucani
- Dipartimento di Chimica—Università degli Studi di Perugia Via Elce di Sotto, 8-06123 Perugia, Italy
| | - Francesca Leonori
- Dipartimento di Chimica—Università degli Studi di Perugia Via Elce di Sotto, 8-06123 Perugia, Italy
| | - Piergiorgio Casavecchia
- Dipartimento di Chimica—Università degli Studi di Perugia Via Elce di Sotto, 8-06123 Perugia, Italy
| |
Collapse
|
585
|
Ayouz M, Mikhailov I, Babikov D, Raoult M, Galtier S, Dulieu O, Kokoouline V. Potential energy and dipole moment surfaces of HCO- for the search of H- in the interstellar medium. J Chem Phys 2012; 136:224310. [PMID: 22713050 DOI: 10.1063/1.4724096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Potential energy and permanent dipole moment surfaces of the electronic ground state of formyl negative ion HCO(-) are determined for a large number of geometries using the coupled-cluster theory with single and double and perturbative treatment of triple excitations ab initio method with a large basis set. The obtained data are used to construct interpolated surfaces, which are extended analytically to the region of large separations between CO and H(-) with the multipole expansion approach. We have calculated the energy of the lowest rovibrational levels of HCO(-) that should guide the spectroscopic characterization of HCO(-) in laboratory experiments. The study can also help to detect HCO(-) in the cold and dense regions of the interstellar medium where the anion could be formed through the association of abundant CO with still unobserved H(-).
Collapse
Affiliation(s)
- M Ayouz
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201, USA
| | | | | | | | | | | | | |
Collapse
|
586
|
Effects of reagent vibrational excitation on the state-to-state quantum dynamics of the OH+CO→H+CO2 reaction in six dimensions (J=0). Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.04.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
587
|
Czakó G, Bowman JM. Dynamics of the O(3P) + CHD3(vCH = 0,1) reactions on an accurate ab initio potential energy surface. Proc Natl Acad Sci U S A 2012; 109:7997-8001. [PMID: 22566657 PMCID: PMC3361422 DOI: 10.1073/pnas.1202307109] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recent experimental and theoretical studies on the dynamics of the reactions of methane with F and Cl atoms have modified our understanding of mode-selective chemical reactivity. The O + methane reaction is also an important candidate to extend our knowledge on the rules of reactivity. Here, we report a unique full-dimensional ab initio potential energy surface for the O((3)P) + methane reaction, which opens the door for accurate dynamics calculations using this surface. Quasiclassical trajectory calculations of the angular and vibrational distributions for the ground state and CH stretching excited O + CHD(3)(v(1) = 0,1) → OH + CD(3) reactions are in excellent agreement with the experiment. Our theory confirms what was proposed experimentally: The mechanistic origin of the vibrational enhancement is that the CH-stretching excitation enlarges the reactive cone of acceptance.
Collapse
Affiliation(s)
- Gábor Czakó
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, GA 30322, USA.
| | | |
Collapse
|
588
|
Li J, Xie C, Ma J, Wang Y, Dawes R, Xie D, Bowman JM, Guo H. Quasi-Classical Trajectory Study of the HO + CO → H + CO2 Reaction on a New ab Initio Based Potential Energy Surface. J Phys Chem A 2012; 116:5057-67. [DOI: 10.1021/jp302278r] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Li
- Department of Chemistry and
Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Changjian Xie
- Department of Chemistry and
Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Institute of Theoretical and
Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Jianyi Ma
- Department of Chemistry and
Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Yimin Wang
- Cherry L. Emerson Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Richard Dawes
- Department of Chemistry, Missouri University of Science and Technology, Rolla,
Missouri 65409, United States
| | - Daiqian Xie
- Institute of Theoretical and
Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Joel M. Bowman
- Cherry L. Emerson Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Hua Guo
- Department of Chemistry and
Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| |
Collapse
|
589
|
Zhu X, Yarkony DR. On the representation of coupled adiabatic potential energy surfaces using quasi-diabatic Hamiltonians: A distributed origins expansion approach. J Chem Phys 2012; 136:174110. [DOI: 10.1063/1.4704789] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
590
|
Accurate Potential Energy Surfaces and Beyond: Chemical Reactivity, Binding, Long-Range Interactions, and Spectroscopy. ACTA ACUST UNITED AC 2012. [DOI: 10.1155/2012/679869] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
591
|
Domcke W, Yarkony DR. Role of Conical Intersections in Molecular Spectroscopy and Photoinduced Chemical Dynamics. Annu Rev Phys Chem 2012; 63:325-52. [DOI: 10.1146/annurev-physchem-032210-103522] [Citation(s) in RCA: 355] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wolfgang Domcke
- Department of Chemistry, Technical University of Munich, D-85747 Garching, Germany
| | - David R. Yarkony
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218; ,
| |
Collapse
|
592
|
Song H, Lu Y, Lee SY. Fully converged integral cross sections of collision induced dissociation, four-center, and single exchange reactions, and accuracy of the centrifugal sudden approximation in H2 + D2 reaction. J Chem Phys 2012; 136:114307. [DOI: 10.1063/1.3693762] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
593
|
Kamarchik E, Rodrigo C, Bowman JM, Reisler H, Krylov AI. Overtone-induced dissociation and isomerization dynamics of the hydroxymethyl radical (CH2OH and CD2OH). I. A theoretical study. J Chem Phys 2012; 136:084304. [DOI: 10.1063/1.3685891] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
594
|
Conforti PF, Braunstein M, Stearns JA, Dodd JA. Collision Dynamics of O(3P) + DMMP Using a Specific Reaction Parameters Potential Form. J Phys Chem A 2012; 116:2506-18. [DOI: 10.1021/jp210302m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick F. Conforti
- Spectral Sciences, Inc.,
4 Fourth Avenue, Burlington, Massachusetts 01803, United States
| | - Matthew Braunstein
- Spectral Sciences, Inc.,
4 Fourth Avenue, Burlington, Massachusetts 01803, United States
| | - Jaime A. Stearns
- Air Force Research Laboratory, Kirtland AFB, New Mexico
87117, United States
| | - James A. Dodd
- Air Force Research Laboratory, Kirtland AFB, New Mexico
87117, United States
| |
Collapse
|
595
|
Bulusu S, Fournier R. Density functional theory guided Monte Carlo simulations: Application to melting of Na13. J Chem Phys 2012; 136:064112. [DOI: 10.1063/1.3684628] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
596
|
|
597
|
Li J, Wang Y, Jiang B, Ma J, Dawes R, Xie D, Bowman JM, Guo H. Communication: A chemically accurate global potential energy surface for the HO + CO → H + CO2 reaction. J Chem Phys 2012; 136:041103. [DOI: 10.1063/1.3680256] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
598
|
Czakó G, Bowman JM. Accurate ab initio potential energy surface, thermochemistry, and dynamics of the Cl(2P, 2P3/2) + CH4 → HCl + CH3 and H + CH3Cl reactions. J Chem Phys 2012; 136:044307. [DOI: 10.1063/1.3679014] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
599
|
Law MM, Fraser-Smith JT, Perotto CU. The potential energy surface of isomerising disilyne. Phys Chem Chem Phys 2012; 14:6922-36. [DOI: 10.1039/c2cp40605e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
600
|
Császár AG, Fábri C, Szidarovszky T, Mátyus E, Furtenbacher T, Czakó G. The fourth age of quantum chemistry: molecules in motion. Phys Chem Chem Phys 2012; 14:1085-106. [DOI: 10.1039/c1cp21830a] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|