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Prosmiti R, González-Lezana T. Computational Modeling: Up-to-Date Approaches and Cutting-Edge Applications from Clusters, Nanostructures to Bulk Systems. Chemphyschem 2024:e202400207. [PMID: 38837591 DOI: 10.1002/cphc.202400207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Indexed: 06/07/2024]
Abstract
The contributions in this special theme collection, in honor to Prof. P. Villarreal, cover a broad variety of computational methodologies and experimental techniques, containing studies on gas phase, clusters and condensed phase systems.
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Affiliation(s)
- Rita Prosmiti
- Instituto de Fìsica Fundamental, IFF-CSIC, Serrano 123, 28006, Madrid, Spain
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Puentes-Milián L, García-Alfonso E, Márquez-Mijares M, Rubayo-Soneira J. NeI 2 Photofragmentation Dynamics Through Quasiclassical and Semiclassical Studies. Chemphyschem 2023; 24:e202300406. [PMID: 37503677 DOI: 10.1002/cphc.202300406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/26/2023] [Accepted: 07/26/2023] [Indexed: 07/29/2023]
Abstract
The triatomic system NeI2 is studied under the consideration that the diatom is found in an excited electronic state (B). The vibrational levels (v=13, …, 23) are considered within two well-known theoretical procedures: quasi-classical trajectories (QCT), where the classical equations of motion for nuclei are solved on a single potential energy surface (PES), and the trajectory surface hopping (TSH) method, where the same are solved in a bunch of crossed vibrational PES (diabatic representation). The trajectory surface hopping fewest switches (TSHFS) is implemented to minimize the number of hoppings, thus allowing the calculations of hopping probability between the different PES's, and the kinetic mechanism to track the dissociation path. From these calculations, several observables such as, the lifetimes, vibrational and rotational energies (I2 ), dissociation channels, are obtained. Our results are compared with previous experimental and theoretical work.
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Affiliation(s)
- Loidel Puentes-Milián
- Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), Universidad de La Habana (UH), Ave. Salvador Allende 1110, Plaza de la Revolución, 10400, La Habana, Cuba
| | - Ernesto García-Alfonso
- Université Toulouse 3 and CNRS, Laboratoire des Collisions, Agrégats et Réactivité, IRSAMC, 118 Route de Narbonne, 31062, Toulouse, Cedex 09, France
| | - Maykel Márquez-Mijares
- Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), Universidad de La Habana (UH), Ave. Salvador Allende 1110, Plaza de la Revolución, 10400, La Habana, Cuba
| | - Jesús Rubayo-Soneira
- Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), Universidad de La Habana (UH), Ave. Salvador Allende 1110, Plaza de la Revolución, 10400, La Habana, Cuba
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Acosta-Matos JC, Meier C, Martínez-Mesa A, Uranga-Piña L. Effective Phase Space Representation of the Quantum Dynamics of Vibrational Predissociation of the ArBr 2(B,ν =16···25) Complex. J Phys Chem A 2022; 126:1805-1815. [PMID: 35285621 DOI: 10.1021/acs.jpca.1c08678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We perform trajectory-based simulations of the vibrational predissociation of the ArBr2(B,ν=16···25) van der Waals triatomic complex, constrained to the T-shape geometry. To this aim, we employ a 2-fold mapping of the quantum dynamics into classical-like dynamics in an extended phase space. The effective phase space comprises two distinct sets of degrees of freedom, namely a collection of coupled harmonic oscillators and an ensemble of quantum trajectories. The time evolution of these variables represent bound and unbound motions of the quantum system, respectively. Quantum trajectories are propagated within the interacting trajectory representation. The comparison between the lifetimes of the predissociating complexes computed using the trajectory-based approach and the experimental results available for the target systems indicates that the present method is competitive with wavepacket propagation techniques. The competition between several simultaneous vibrational relaxation pathways was found to have a direct impact on the time scales of vibrational predissociation. Likewise, the analysis of the time evolution of the trajectories reveals the existence of regions in the effective phase space where transitions to vibrational states of higher energy are more likely to occur. The size and location of these regions influence the transient vibrational distributions and therefore the computed lifetimes. Furthermore, the mechanisms of energy redistribution along the dissociation coordinate are analyzed.
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Affiliation(s)
- Juan Carlos Acosta-Matos
- Department of Physics, Centre for Technological Applications and Nuclear Developments (CEADEN), Havana 11300, Cuba
| | - Christoph Meier
- Laboratoire Collisions Agrégats Réactivité (IRSAMC), UMR 5589, Université Toulouse III - Paul Sabatier, F-31062 Toulouse Cedex 09, France
| | - Aliezer Martínez-Mesa
- Laboratoire Collisions Agrégats Réactivité (IRSAMC), UMR 5589, Université Toulouse III - Paul Sabatier, F-31062 Toulouse Cedex 09, France.,DynAMoS (Dynamical Processes in Atomic and Molecular Systems), Facultad de Física, Universidad de la Habana, Havana 10400, Cuba
| | - Llinersy Uranga-Piña
- Laboratoire Collisions Agrégats Réactivité (IRSAMC), UMR 5589, Université Toulouse III - Paul Sabatier, F-31062 Toulouse Cedex 09, France.,DynAMoS (Dynamical Processes in Atomic and Molecular Systems), Facultad de Física, Universidad de la Habana, Havana 10400, Cuba
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Andreev AS, Baturo VV, Lukashov SS, Poretsky SA, Pravilov AM, Zhironkin AI. Experimental and theoretical investigations of HeNeI 2 trimer. J Chem Phys 2020; 152:234307. [DOI: 10.1063/5.0008760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Aleksei S. Andreev
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
| | - Vera V. Baturo
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
| | - Sergey S. Lukashov
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
| | - Sergey A. Poretsky
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
| | - Anatoly M. Pravilov
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
| | - Anatoly I. Zhironkin
- Department of Physics, Saint Petersburg State University, SPbSU, 7/9 Universitetskaya nab., Saint Petersburg 199034, Russia
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Acosta-Matos J, Martínez-Mesa A, Uranga-Piña L. Trajectory-based modelling of the quantum dynamics of vibrational predissociation: Application to the Ar ⋯Br2v=24 complex. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2019.110544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Structure and dynamics of noble gas-halogen and noble gas ionic clusters: When theory meets experiment. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.05.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Villarreal P, Miret-Artés S, Roncero O, Campos-Martínez J. New trends in atomic and molecular clusters (in honour of Gerardo Delgado-Barrio). Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Arbelo-González W, González-Martínez ML, Reed SK, Rubayo-Soneira J, Shalashilin DV. Quasi-classical trajectories study of Ne2Br2(B) vibrational predissociation: Kinetics and product distributions. J Chem Phys 2012; 136:144303. [DOI: 10.1063/1.3700156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Valdés A, Prosmiti R, Villarreal P, Delgado-Barrio G. Full-dimensional multi configuration time dependent Hartree calculations of the ground and vibrationally excited states of He2,3Br2 clusters. J Chem Phys 2011; 135:054303. [PMID: 21823696 DOI: 10.1063/1.3618727] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Quantum dynamics calculations are reported for the tetra-, and penta-atomic van der Waals He(N)Br(2) complexes using the multiconfiguration time-dependent Hartree (MCTDH) method. The computations are carried out in satellite coordinates, and the kinetic energy operator in this set of coordinates is given. A scheme for the representation of the potential energy surface based on the sum of the three-body HeBr(2) interactions at CSSD(T) level plus the He-He interaction is employed. The potential surfaces show multiple close lying minima, and a quantum description of such highly floppy multiminima systems is presented. Benchmark, full-dimensional converged results on ground vibrational/zero-point energies are reported and compared with recent experimental data available for all these complexes, as well as with previous variational quantum calculations for the smaller HeBr(2) and He(2)Br(2) complexes on the same surface. Some low-lying vibrationally excited eigenstates are also computed by block improved relaxation calculations. The binding energies and the corresponding vibrationally averaged structures are determined for different conformers of these complexes. Their relative stability is discussed, and contributes to evaluate the importance of the multiple-minima topology of the underlying potential surface.
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Affiliation(s)
- Alvaro Valdés
- Instituto de Física Fundamental (IFF-CSIC), CSIC, Madrid, Spain.
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García-Vela A. Vibrational predissociation dynamics of Cl2(B)-He2: a wave packet study. Phys Chem Chem Phys 2011; 13:12075-86. [PMID: 21623448 DOI: 10.1039/c0cp02367a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The vibrational predissociation of Cl(2)(B)-He(2) has been studied using a full dimensional wave packet method. The aim is to investigate the effect of increasing the grid size in the dissociative coordinates and the propagation time, on the convergence of observable magnitudes like predissociation lifetimes and Cl(2) product vibrational and rotational distributions. In particular, convergence of vibrational distributions is significantly affected by an artifact caused by the use of finite grids and absorbing conditions for the wave packet, combined with the presence of a sequential dissociation process. The results show that the lifetimes and the Cl(2)(B) rotational distributions are not greatly affected by increasing propagation time and grid size. However, convergence of the Cl(2) vibrational distribution is very slow, and the strategy of converging this property by increasing the grid size becomes impractical. An approximate model to estimate the Cl(2) vibrational populations is suggested, which is found to provide realistic distributions as compared with the available experimental ones. The main feature of the model is that its assumptions are closely based on the nature of the vibrational predissociation process occurring in the type of complexes. This feature of the model, in addition to its simplicity of implementation and negligible extra computational cost, contributes to the general applicability of the approach to BC(B)-Rg(2) complexes.
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Affiliation(s)
- A García-Vela
- Instituto de Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain.
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Reed SK, González-Martínez ML, Rubayo-Soneira J, Shalashilin DV. Cartesian coupled coherent states simulations: NenBr2 dissociation as a test case. J Chem Phys 2011; 134:054110. [DOI: 10.1063/1.3532407] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sun L, Hase WL. Comparisons of classical and Wigner sampling of transition state energy levels for quasiclassical trajectory chemical dynamics simulations. J Chem Phys 2010; 133:044313. [DOI: 10.1063/1.3463717] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pio JM, Taylor MA, van der Veer WE, Bieler CR, Cabrera JA, Janda KC. Real-time dissociation dynamics of the Ne2Br2 van der Waals complex. J Chem Phys 2010; 133:014305. [DOI: 10.1063/1.3456550] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Castro-Palacio JC, Ishii K, Ayala-Mató F, Rubayo-Soneira J, Yamashita K. Argon Solid Response upon Rydberg Photoexcitation of the NO Chromosphore: Case of Using ab Initio Potential Energy Surfaces and Comparison to Similar Studied Systems. J Phys Chem A 2010; 114:9673-80. [DOI: 10.1021/jp101181v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Juan Carlos Castro-Palacio
- Departamento de Física, Universidad de Pinar del Río. Martí 270, Esq. 27 de Noviembre, Pinar del Río 20100, Cuba
| | - Keisaku Ishii
- Department of Chemical System Engineering. Graduate School of Engineering. The University of Tokyo, Tokyo 113-8656, Japan
| | - Fernando Ayala-Mató
- Departamento de Física General y Matemáticas. Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Ave. Carlos III y Luaces, Plaza, C. Habana 10400, Cuba
| | - Jesús Rubayo-Soneira
- Departamento de Física General y Matemáticas. Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Ave. Carlos III y Luaces, Plaza, C. Habana 10400, Cuba
| | - Koichi Yamashita
- Department of Chemical System Engineering. Graduate School of Engineering, the University of Tokyo, Tokyo 113-8656, Japan
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Pajón-Suárez P, Rojas-Lorenzo GA, Rubayo-Soneira J, Hernández-Lamoneda R, Larrégaray P. On the Local Relaxation of Solid Neon upon Rydberg Excitation of a NO Impurity: The Role of the NO(A)−Ne Interaction Potential and Zero-Point Quantum Delocalization. J Phys Chem A 2009; 113:14399-406. [DOI: 10.1021/jp903538f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pedro Pajón-Suárez
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Avenida Salvador Allende y Luaces, Plaza C. Habana, Cuba, Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62210, Mexico, and Institut des Sciences Moléculaires, Université Bordeaux 1/CNRS, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Germán A. Rojas-Lorenzo
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Avenida Salvador Allende y Luaces, Plaza C. Habana, Cuba, Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62210, Mexico, and Institut des Sciences Moléculaires, Université Bordeaux 1/CNRS, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Jesús Rubayo-Soneira
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Avenida Salvador Allende y Luaces, Plaza C. Habana, Cuba, Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62210, Mexico, and Institut des Sciences Moléculaires, Université Bordeaux 1/CNRS, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Ramón Hernández-Lamoneda
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Avenida Salvador Allende y Luaces, Plaza C. Habana, Cuba, Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62210, Mexico, and Institut des Sciences Moléculaires, Université Bordeaux 1/CNRS, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Pascal Larrégaray
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Quinta de los Molinos, Avenida Salvador Allende y Luaces, Plaza C. Habana, Cuba, Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62210, Mexico, and Institut des Sciences Moléculaires, Université Bordeaux 1/CNRS, 351 Cours de la Libération, 33405 Talence Cedex, France
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Castro-Palacio JC, Ishii K, Rubayo-Soneira J, Yamashita K. An ab initio study of the Ar–NO(A Σ2+) intermolecular potential. J Chem Phys 2009; 131:044506. [DOI: 10.1063/1.3185347] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Uranga-Piña L, Martínez-Mesa A, García-Reyes L, Rubayo-Soneira J. Effective temperature representation of quantum delocalization effects on the dynamics of NO(A2Σ+←X2Π+) photoexcitation in Ne matrices. Phys Chem Chem Phys 2009; 11:5358-68. [DOI: 10.1039/b819355j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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González-Martínez M, Arbelo-González W, Rubayo-Soneira J, Bonnet L, Rayez JC. Vibrational predissociation of van der Waals complexes: Quasi-classical results with Gaussian-weighted trajectories. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.08.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Castro-Palacios JC, Rubayo-Soneira J, Ishii K, Yamashita K. Ab initio ground and excited state potential energy surfaces for NO-Kr complex and dynamics of Kr solids with NO impurity. J Chem Phys 2007; 126:134315. [PMID: 17430040 DOI: 10.1063/1.2715947] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The intermolecular potentials for the NO(X 2Pi)-Kr and NO(A 2Sigma+)-Kr systems have been calculated using highly accurate ab initio calculations. The spin-restricted coupled cluster method for the ground 1 2A' state [NO(X 2Pi)-Kr] and the multireference singles and doubles configuration interaction method for the excited 2 2A' state [NO(A 2Sigma+)-Kr], respectively, were used. The potential energy surfaces (PESs) show two linear wells and one that is almost in the perpendicular position. An analytical representation of the PESs has been constructed for the triatomic systems and used to carry out molecular dynamics (MD) simulations of the NO-doped krypton matrix response after excitation of NO. MD results are shown comparatively for three sets of potentials: (1) anisotropic ab initio potentials [NO molecule direction fixed during the dynamics and considered as a point (its center of mass)], (2) isotropic ab initio potentials (isotropic part in a Legendre polynomial expansion of the PESs), and (3) fitted Kr-NO potentials to the spectroscopic data. An important finding of this work is that the anisotropic and isotropic ab initio potentials calculated for the Kr-NO triatomic system are not suitable for describing the dynamics of structural relaxation upon Rydberg excitation of a NO impurity in the crystal. However, the isotropic ab initio potential in the ground state almost overlaps the published experimental potential, being almost independent of the angle asymmetry. This fact is also manifested in the radial distribution function around NO. However, in the case of the excited state the isotropic ab initio potential differs from the fitted potentials, which indicates that the Kr-NO interaction in the matrix is quite different because of the presence of the surrounding Kr atoms acting on the NO molecule. MD simulations for isotropic potentials reasonably reproduce the experimental observables for the femtosecond response and the bubble size but do not match spectroscopic results. A general overall view of the results suggests that, when the Kr-NO interaction takes place inside the matrix, potentials are rather symmetric and less repulsive than those for the triatomic system.
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González-Martínez ML, Rubayo-Soneira J, Janda K. Quasi-classical trajectories study of Ne79Br2(B) vibrational predissociation. Phys Chem Chem Phys 2006; 8:4550-8. [PMID: 17047752 DOI: 10.1039/b605585k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A full-dimensional quasi-classical trajectories study on the vibrational predissociation (VP) of the Ne79Br2(B) complex is presented. Following the most recent experiments, the Br2(B) vibrational levels v'=16-29 were explored. The total angular momentum, J, was taken to be zero, and a semiclassical Franck-Condon model to compute initial conditions from quantum distributions was employed. Predissociation lifetimes were extracted from Ne79Br2 population decay by using two different exponential laws. Predicted lifetimes are in excellent agreement with the last experimental results [J. A. Cabrera, C. R. Bieler, B. C. Olbricht, W. E. van der Veer and K. C. Janda, J. Chem. Phys., 2005, 123, 054311]. The Br2 fragment ro-vibrational distributions resulting from the VP of the molecule were obtained from the statistics of classical magnitudes using the standard binning procedure. Computed rotational distributions (for the Deltav'=-1, -2 channels) are also in very good agreement with the experimental results [M. Nejad-Sattari and T. A. Stephenson, J. Chem. Phys., 1997, 106 5454]. The influence of two quantum effects-the closing of the Deltav'=-1 dissociation channel and the intramolecular vibrational relaxation (IVR) mechanism-on the agreement with experimental rotational distributions, is discussed. Due to the classical character of our calculations and the binning procedure we used, the agreement of computed vibrational distributions with experimental and quantum theoretical is qualitative. For instance, for v'=28-for which the Deltav'=-1 channel is experimentally found to be closed-the Deltav'=-2 channel becomes statistically more significant. A discussion on the viability of similar quasi-classical methods to model the VP dynamics of analogous clusters is presented.
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Affiliation(s)
- M L González-Martínez
- Departamento de Física General y Matemáticas, Instituto Superior de Tecnologías y Ciencias Aplicadas, Habana, 10600, Cuba
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García-Vela A. A full-dimensional quantum dynamical approach to the vibrational predissociation of Cl2–He2. J Chem Phys 2005; 122:14312. [PMID: 15638664 DOI: 10.1063/1.1827600] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A full-dimensional, fully coupled wave packet method is proposed and applied to investigate the vibrational predissociation dynamics of the Cl2(B,v')-He2 complex. Simulations are carried out for the resonance states associated with the v'=10-13 initial vibrational excitations of Cl2, and the results are compared with the available experimental data. A good agreement with experiment is achieved for the resonance lifetimes (typically within experimental error) and the Cl(2) fragment rotational distributions. The mechanism of dissociation of the two He atoms is found to be dominantly sequential, through the Deltav'= -2 channel. The probabilities obtained for the Deltav'= -1 dissociation channel are, however, overestimated due to the use of absorbing boundary conditions combined with finite grid effects. It is suggested that a mechanism of energy redistribution through the couplings between the van der Waals modes of the two weak bonds takes place in the Deltav'= -1 dissociation. This mechanism is consistent with the resonance lifetimes and Cl2 rotational distributions predicted. The favorable comparison with most of the experimental data supports the reliability of the potential used to model Cl2(B,v')-He2, at least in the present range of v' levels.
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Affiliation(s)
- A García-Vela
- Instituto de Matemáticas y Física Fundamental, CSIC, Serrano 123, 28006 Madrid, Spain.
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25
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Garcı́a-Vela A. An alternative phase-space distribution to sample initial conditions for classical dynamics simulations. Chem Phys 2002. [DOI: 10.1016/s0301-0104(02)00818-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Vigliotti F, Bonacina L, Chergui M, Rojas-Lorenzo G, Rubayo-Soneira J. Ultrafast expansion and vibrational coherences of electronic `Bubbles' in solid neon. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01022-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Garcı́a-Vela A. A full-dimensional quantum approach to the vibrational predissociation of tetra-atomic complexes based on the partially-separable time-dependent self-consistent-field approximation. J Chem Phys 2002. [DOI: 10.1063/1.1461823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Meier C, Manthe U. Full-dimensional quantum study of the vibrational predissociation of the I2⋯Ne2 cluster. J Chem Phys 2001. [DOI: 10.1063/1.1389307] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Ceotto M, Garcı́a-Vela A. A reduced-dimensionality quantum model which incorporates the full-dimensional energy of the system: Application to the vibrational predissociation of Cl2–Ne2. J Chem Phys 2001. [DOI: 10.1063/1.1385153] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rohrbacher A, Halberstadt N, Janda KC. The dynamics of noble gas--halogen molecules and clusters. Annu Rev Phys Chem 2000; 51:405-33. [PMID: 11031288 DOI: 10.1146/annurev.physchem.51.1.405] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The vibrational relaxation of noble gas-halogen van der Waals clusters has been fertile territory for the development of experimental and theoretical tools for state-to-state dynamics studies. Proceeding through the various combinations of noble gas atoms and halogen molecules, one goes from "simple" direct vibrational predissociation, through sequential relaxation pathways, to the statistical intramolecular vibrational relaxation limit. In some cases the vibrational processes dominate, in others electronically nonadiabatic processes, including chemical reactions, interfere. Thus the noble gas-halogen species provide test cases for most of the dynamical processes available to more "normal" molecules. This review discusses the current state-of-the-art for such studies and points to important problems that remain to be solved.
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Affiliation(s)
- A Rohrbacher
- Department of Chemistry, University of California, San Diego, La Jolla, California 92093-0332, USA
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Garcı́a-Vela A. On the importance of an accurate representation of the initial state of the system in classical dynamics simulations. J Chem Phys 2000. [DOI: 10.1063/1.481435] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Diabatic diffusion Monte Carlo calculations of the energy and structure of the Cl 2 He n ( n =1–10) clusters. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0166-1280(99)00232-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bastida A, Miguel B, Zuñiga J, Requena A, Halberstadt N, Janda KC. Hybrid quantum/classical simulation and kinetic study of the vibrational predissociation of Cl2⋯Nen (n=2, 3). J Chem Phys 1999. [DOI: 10.1063/1.479219] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fernandez Alberti S, Halberstadt N, Beswick JA, Bastida A, Zúñiga J, Requena A. Intramolecular vibrational redistribution and fragmentation dynamics of I2 ⋯ Nen (n=2–6) clusters. J Chem Phys 1999. [DOI: 10.1063/1.479269] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Bastida A, Zuñiga J, Requena A, Halberstadt N, Beswick JA. Vibrational predissociation of the I2⋯Ne2 cluster: A molecular dynamics with quantum transitions study. J Chem Phys 1998. [DOI: 10.1063/1.477274] [Citation(s) in RCA: 35] [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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Hernández MI, Garcı́a-Vela A, Garcı́a-Rizo C, Halberstadt N, Villarreal P, Delgado-Barrio G. A hybrid classical/quantum approach to cluster fragmentation dynamics: Application to the vibrational predissociation of He2Cl2. J Chem Phys 1998. [DOI: 10.1063/1.475578] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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