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Makarem C, Wei J, Loomis RA, Darr JP. Vibrational predissociation versus intramolecular vibrational energy redistribution (IVR) in rare gas⋯dihalogen complexes: IVR identified in Ar⋯I 2(B, ν') using velocity-map imaging. Phys Chem Chem Phys 2021; 23:26108-26119. [PMID: 34812449 DOI: 10.1039/d1cp04727b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The competition between multiple pathways sampled during the energetic relaxation of excited molecules can be difficult to experimentally decipher. The rare gas···dihalogen van der Waals complexes have remained key systems for exploring the competition between relaxation pathways, such as intramolecular vibrational energy redistribution (IVR) and vibrational predissociation (VP). As these mechanisms can yield the same products, the relaxation pathways traversed are often deduced from the excitation spectra or product-state distributions. In addition to a brief perspective on IVR and VP in rare gas⋯dihalogen complexes, we present new results obtained using time-of-flight velocity-map imaging (VMI) on T-shaped Ar⋯I2(B, ν', n' = 0) complexes that illustrate how contributions from these two pathways can be separated. The angular anisotropies of the ion images collected for the I2(B, ν < ν') fragments indicate the products for certain Ar⋯I2(B, ν', n' = 0) levels are weighted along the direction perpendicular to the laser-polarization axis. These distributions are consistent with prompt dissociation of the T-shaped excited-state complexes, likely via direct VP. The distributions measured for other Ar⋯I2(B, ν', n' = 0) levels are preferentially along the laser-polarization axis. These initially prepared levels must undergo IVR with nearly resonant Ar⋯I2(B, ν < ν', n > 0) intermolecular vibrational levels that sample linear Ar-I-I orientations during dissociation.
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Affiliation(s)
- Camille Makarem
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, CB 1134, Saint Louis, MO 63130, USA.
| | - Jie Wei
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, CB 1134, Saint Louis, MO 63130, USA.
| | - Richard A Loomis
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, CB 1134, Saint Louis, MO 63130, USA.
| | - Joshua P Darr
- Department of Chemistry, University of Nebraska at Omaha, 6001 Dodge St, DSC 337, Omaha, NE 68182, USA.
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Zeigler N, Makarem C, Wei J, Loomis RA. Electronic predissociation in rare gas–dihalogen complexes. J Chem Phys 2020; 152:094303. [DOI: 10.1063/1.5145106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nicholas Zeigler
- Department of Chemistry and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Camille Makarem
- Department of Chemistry and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Jie Wei
- Department of Chemistry and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Richard A. Loomis
- Department of Chemistry and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
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Kalemos A, Valdés Á, Prosmiti R. Theoretical investigation of the He-I2(E3Πg) ion-pair state: ab initio intermolecular potential and vibrational levels. J Chem Phys 2012; 137:034303. [PMID: 22830698 DOI: 10.1063/1.4733983] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a theoretical study on the potential energy surface and vibrational bound states of the E electronic excited state of the HeI(2) van der Waals system. The interaction energies are computed using accurate ab initio methods and large basis sets. Relativistic small-core effective core potentials in conjunction with a quintuple-zeta quality basis set are employed for the heavy iodine atoms in multireference configuration interaction calculations for the (3)A' and (3)A" states. For the representation of the potential energy surface we used a general interpolation technique for constructing potential surfaces from ab initio data based on the reproducing kernel Hilbert space method. The surface presents global and local minima for T-shaped configurations with well-depths of 33.2 and 4.6 cm(-1), respectively. Vibrational energies and states are computed through variational quantum mechanical calculations. We found that the binding energy of the HeI(2)(E) T-shaped isomer is 16.85 cm(-1), in excellent agreement with recent experimental measurements. In lieu of more experimental data we also report our predictions on higher vibrational levels and we analyze the influence of the underlying surface on them. This is the first attempt to represent the potential surface of such a highly excited electronic state of a van der Waals complex, and it demonstrates the capability of the ab initio technology to provide accurate results for carrying out reliable studies to model experimental data.
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Affiliation(s)
- Apostolos Kalemos
- National and Kapodistrian University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis, Athens 15771, Greece.
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4
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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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5
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Pajón-Suárez P, Rubayo-Soneira J, Hernández-Lamoneda R. A New ab Initio Potential Energy Surface for Studying Vibrational Relaxation in NO(v) + NO Collisions. J Phys Chem A 2011; 115:2892-9. [DOI: 10.1021/jp200199y] [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, Av. Salvador Allende y Luaces, Quinta de Los Molinos, La Habana 10600, Cuba
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos., 62210, México
| | - Jesús Rubayo-Soneira
- Instituto Superior de Tecnologías y Ciencias Aplicadas, Av. Salvador Allende y Luaces, Quinta de Los Molinos, La Habana 10600, Cuba
| | - Ramón Hernández-Lamoneda
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos., 62210, México
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6
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Buchachenko A, Halberstadt N, Lepetit B, Roncero O. Ar ··· I 2 : A model system for complex dynamics. INT REV PHYS CHEM 2010. [DOI: 10.1080/0144235031000075726] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Alexei Buchachenko
- a Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry , Moscow State University , Moscow , 119992 , Russia
| | - Nadine Halberstadt
- b LPQT-IRSAMC , Université Paul Sabatier and CNRS , 118 route de Narbonne, Toulouse , 31062 , France
| | - Bruno Lepetit
- c LCAR-IRSAMC , Université Paul Sabatier and CNRS , 118 route de Narbonne, Toulouse , 31062 , France
| | - Octavio Roncero
- d Instituto de Matemáticas y Física Fundamental , CSIC , Serrano 123, Madrid , 28006 , Spain
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7
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Taylor MA, Pio JM, van der Veer WE, Janda KC. Competition between electronic and vibrational predissociation dynamics of the HeBr2 and NeBr2 van der Waals molecules. J Chem Phys 2010; 132:104309. [DOI: 10.1063/1.3353954] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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8
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García-Gutierrez L, Delgado-Tellez L, Valdés Á, Prosmiti R, Villarreal P, Delgado-Barrio G. Intermolecular Ab Initio Potential and Spectroscopy of the Ground State of HeI2 Complex Revisited. J Phys Chem A 2009; 113:5754-62. [DOI: 10.1021/jp901250u] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Álvaro Valdés
- Instituto de Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Rita Prosmiti
- Instituto de Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Pablo Villarreal
- Instituto de Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
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9
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Cabanillas-Vidosa I, Rinaldi CA, Pino GA, Ferrero JC. Vibrational energy transfer between I2(B (3)Pi(0u)+, nu' = 21) and He at very low temperatures: impulsive versus complex formation mechanisms assisted by tunneling through the centrifugal barrier. J Chem Phys 2008; 129:144303. [PMID: 19045143 DOI: 10.1063/1.2987706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The temperature dependence of the state-to-state vibrational relaxation rate constant (k(nu)(21-Delta nu)) for collisions between I(2)(B,nu(')=21) and He at very low kinetic energies was studied. The fluorescence from I(2)(B,nu(')=21-Delta nu(')) with Delta nu(')=1-5 indicates that in the temperature range of 0.6-8.2 K these states are populated by only one collision with He. The behavior of k(nu)(21-Delta nu) with temperature can be divided into two groups. The group with quantum changes Delta nu(')=1-3 shows scattering resonances in the low temperature region, with a general monotonical decrease of the rate constant with temperature, suggesting the importance of van der Waals interactions. This behavior is supported by the calculation of the probability of tunneling through the centrifugal barriers. For collisions in which 4-5 quanta are lost in a single event, there are no evidences of scattering resonances and the values of the relaxation rate constants could be determined only at the highest temperatures of this study. This suggests that relaxation occurs via impulsive collisions. The branching ratios for each channel are also temperature dependent and this behavior also suggests that the energy transfer mechanism changes with Delta nu(').
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Affiliation(s)
- Iván Cabanillas-Vidosa
- Centro Laser de Ciencias Moleculares, INF1QC, Departamento de Fisicoquimica, Facultad de Ciencias Quimicas, Universidad Nacional de Cordoba, Pabellon Argentina, Ciudad Universitaria, 5000 Cordoba, Argentina
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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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11
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Cabrera J, Bieler CR, McKinney N, van der Veer WE, Pio JM, Janda K, Roncero O. Time and frequency resolved dynamics of ArBr2. J Chem Phys 2007; 127:164309. [DOI: 10.1063/1.2794332] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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12
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Valdés A, Prosmiti R, Villarreal P, Delgado-Barrio G, Lemoine D, Lepetit B. Ab initiovibrational predissociation dynamics of He–I2(B) complex. J Chem Phys 2007; 126:244314. [PMID: 17614556 DOI: 10.1063/1.2748404] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional quantum mechanical calculations on the vibrational predissociation dynamics of HeI2 B state complex are performed using a potential energy surface accurately fitted to unrestricted open-shell coupled cluster ab initio data, further enabling extrapolation for large I2 bond lengths. A Lanczos iterative method with an optimized complex absorbing potential is used to determine energies and lifetimes of the vibrationally predissociating He,I2(B,v') complex for v'<or=26 of I2 vibrational excitations. The calculated predissociating state energies agree with recent experimental results within 0.5 cm(-1). This excellent agreement is remarkable since no adjustment was made with respect to the experiments. The present ab initio approach, however, shows its limitations in the fact that the computed lifetimes that are highly sensitive to subtle details of the potential energy surfaces such as anisotropy, are a factor of 1.5 larger than the available experimental data.
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Affiliation(s)
- Alvaro Valdés
- Instituto de Matemáticas y Física Fundamental, CSIC, Serrano 123, 28006 Madrid, Spain
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13
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Valdés A, Prosmiti R, Villarreal P, Delgado-Barrio G, Werner HJ. Ab initio potential energy surface and spectrum of the B(Π3) state of the HeI2 complex. J Chem Phys 2007; 126:204301. [PMID: 17552756 DOI: 10.1063/1.2737782] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The three-dimensional interaction potential for I2(B 3Pi0u+)+He is computed using accurate ab initio methods and a large basis set. Scalar relativistic effects are accounted for by large-core relativistic pseudopotentials for the iodine atoms. Using multireference configuration interaction calculations with subsequent treatment of spin-orbit coupling, it is shown for linear and perpendicular structures of the complex that the interaction potential for I2(B 3Pi0u+)+He is very well approximated by the average of the 3A' and 3A" interaction potentials obtained without spin-orbit coupling. The three-dimensional 3A' and 3A" interaction potentials are computed at the unrestricted open-shell coupled-cluster level of theory using large basis sets. Bound state calculations based on the averaged surface are carried out and binding energies, vibrationally averaged structures, and frequencies are determined. These results are found to be in excellent accord with recent experimental measurements from laser-induced fluorescence and action spectra of HeI2. Furthermore, in combination with a recent X-state potential, the spectral blueshift is obtained and compared with available experimental values.
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Affiliation(s)
- Alvaro Valdés
- Instituto de Matemáticas y Física Fundamental, CSIC, Serrano 123, 28006 Madrid, Spain
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14
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García-Vela A. An empirical potential-energy surface for the He–I2(BΠu3) van der Waals complex including three-body effects. J Chem Phys 2005; 123:124311. [PMID: 16392486 DOI: 10.1063/1.2040367] [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
An empirical intermolecular potential surface is proposed for the He-I2(B 3IIu) complex, modeled as a sum of pairwise He-I Morse interactions plus a three-body interaction term. The potential reproduces with very good agreement the spectral blueshifts and vibrational predissociation lifetimes measured for He-I2(B,v') in the range v' = 10-67 of I2 vibrational excitations. In particular, the accuracy achieved in the description of the experimental data for high v' levels is attributed to the three-body interaction term included in the potential. The behavior of the potential surface with the I-I separation is analyzed and correlated with the experimental findings.
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Affiliation(s)
- A García-Vela
- Instituto de Matemáticas y Física Fundamental, Consejo Superior de Investigaciones Cientificas (CSIC), Serrano 123, 28006 Madrid, Spain.
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15
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Boucher DS, Strasfeld DB, Loomis RA, Herbert JM, Ray SE, McCoy AB. Stabilization and rovibronic spectra of the T-shaped and linear ground-state conformers of a weakly bound rare-gas–homonuclear dihalogen complex: He⋯Br2. J Chem Phys 2005; 123:104312. [PMID: 16178602 DOI: 10.1063/1.2006675] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Laser-induced fluorescence spectra of Br(2) entrained in a He supersonic expansion have been recorded in the Br(2) B-X, 8-0, 12-0, and 21-0 spectral regions at varying downstream distances, and thus different temperature regimes. Features associated with transitions of the T-shaped and linear He...Br(2)(X,nu(") = 0) complexes are identified. The changes in the relative intensities of the T-shaped and linear features with cooling in the expansion indicate that the linear conformer is energetically more stable than the T-shaped conformer. A He + Br(2)(X,nu(") = 0) ab initio potential-energy surface, computed at the coupled cluster level of theory with a large, flexible basis set, is used to calculate the binding energies of the two conformers, 15.8 and 16.5 cm(-1) for the T-shaped and linear complexes, respectively. This potential and an excited-state potential [M. P. de Lara-Castells, A. A. Buchachenko, G. Delgado-Barrio, and P. Villareal, J. Chem. Phys. 120, 2182 (2004)] are used to calculate the excitation spectra of He...(79)Br(2)(X,nu(") = 0) in the Br(2) B-X, 12-0 region. The calculated spectra are used to make spectral assignments and to determine the energies of the excited-state intermolecular vibrational levels accessed in the observed transitions. Temperature-dependent laser-induced fluorescence spectra and a simple thermodynamic model [D. S. Boucher, J. P. Darr, M. D. Bradke, R. A. Loomis, and A. B. McCoy, Phys. Chem. Chem. Phys. 6, 5275 (2004)] are used to estimate that the linear conformer is 0.4(2) cm(-1) more strongly bound than the T-shaped conformer. Two-laser action spectroscopy experiments reveal that the binding energy of the linear He...(79)Br(2)(X,nu(") = 0) conformer is 17.0(8) cm(-1), and that of the T-shaped He...(79)Br(2)(X,nu(") = 0) conformer is then 16.6(8) cm(-1), in good agreement with the calculated values.
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Affiliation(s)
- David S Boucher
- Department of Chemistry, Washington University in St. Louis, CB 1134, Missouri, 63130, USA
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Cabrera JA, Bieler CR, Olbricht BC, van der Veer WE, Janda KC. Time-dependent pump-probe spectra of NeBr2. J Chem Phys 2005; 123:054311. [PMID: 16108643 DOI: 10.1063/1.1990118] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Time- and frequency-resolved pump-probe measurements on NeBr2 have been performed to better characterize its fragmentation dynamics on the B electronic state for vibrational levels in the energy region of the transition from direct vibrational predissociation to intramolecular vibrational relaxation dynamics. Above nu'=20 of the Br2 stretching mode, it was observed that the dependence of lifetime on the vibrational quantum number deviates from the energy-gap law by leveling off in the range of 10 ps<tau<20 ps. In addition to measuring the appearance of Br2 product state levels, we were able to monitor the decay of the initially excited NeBr2 via B-->E transitions of the complex. These transitions are shifted 20 cm(-1) to lower energy from the free Br2 resonances, indicating an E state Ne-Br2 bond energy of 82 cm(-1). Measurements of NeBr2 vibrational predissociation via the delta nu=-2 channel were also performed for nu'=27, 28, and 29. The closing of the delta nu=-1 channel leads to an increase in the lifetimes of these vibrational levels. A new Nd:yttrium aluminum garnet pumped dual optical parametric oscillator/optical parametric amplifier system is described that allows us to conveniently record time-delayed pump-probe spectra with 2-cm(-1) spectral resolution and 15-ps time resolution.
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Affiliation(s)
- Jose A Cabrera
- Department of Chemistry and Institute of Surface and Interface Science, University of California, Irvine, California 92697-2025, USA.
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17
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García-Vela A. An empirical potential energy surface for the He-Br2 (B3pi(u)) van der Waals complex. J Phys Chem A 2005; 109:5545-52. [PMID: 16833885 DOI: 10.1021/jp051167n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
An empirical potential energy surface is proposed for the He-Br2 (B3pi(u)) complex. The intermolecular potential is modeled as a sum of pairwise He-Br Morse interactions plus a three-body interaction term. The parameters of the potential are fitted in order to reproduce the spectral blue-shifts and vibrational predissociation line widths measured for He-79Br2 (B, v') in the range v' = 8-48 of Br2 vibrational excitations. The calculated blue-shifts and line widths are in very good agreement with the measurements (typically within experimental error or close to its limits) along the whole range of v' levels studied. It is particularly remarkable to note the accuracy provided by the interaction surface in the region of high v' excitations (v' > 35), where three-body effects become important. The behavior of the potential surface with the Br-Br separation is analyzed and correlated with the experimental findings.
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Affiliation(s)
- A García-Vela
- Instituto de Matematicas y Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain.
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18
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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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19
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Valdés * Á, Prosmiti R, Villarreal P, Delgado-Barrio G. HeBr2complex: ground-state potential and vibrational dynamics fromab initiocalculations. Mol Phys 2004. [DOI: 10.1080/00268970412331290634] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Prosmiti R, Valdés Á, Villarreal P, Delgado-Barrio G. Three-Dimensional ab Initio Potential and Ground State Dynamics of the HeI2 Complex. J Phys Chem A 2004. [DOI: 10.1021/jp048787t] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rita Prosmiti
- Instituto de Matemáticas y Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Álvaro Valdés
- Instituto de Matemáticas y Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Pablo Villarreal
- Instituto de Matemáticas y Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Gerardo Delgado-Barrio
- Instituto de Matemáticas y Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
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21
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de Lara-Castells MP, Buchachenko AA, Delgado-Barrio G, Villarreal P. The open-shell interaction of He with the B 3Πu(0+) state of Br2: Anab initiostudy and its comparison with a diatomics-in-molecule perturbation model. J Chem Phys 2004; 120:2182-92. [PMID: 15268356 DOI: 10.1063/1.1636716] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The interaction of He with Br2 in electronically excited B 3Piu state is investigated using spin-unrestricted single and double coupled-cluster approach with noniterative perturbative treatment of triple excitations. Internal electrons of the Br atom are described by effective core pseudopotentials. The validity of this approach is analyzed by comparing the lowest 2Sigma+ and 2Pi electronic states of the HeBr molecule with those obtained in all electron calculations [J. Chem. Phys. 115, 10438 (2001)]. In this context, we examine the performance of different basis sets and saturation with bond functions. The comparison of theoretical blue-shifts with the experiment provides confidence about the present ab initio calculations. In addition, He-Br results of ab initio calculations at the same level are used to obtain approximate He-Br2 (3Piu) interactions in the framework of the diatomics-in-molecule first order perturbation theory (IDIM-PT1) [J. Chem. Phys. 104, 9913 (1996)]. Overall, the IDIM-PT1 model results show a good agreement with the ab initio ones, being the main difference the sensitivity to the elongation of the Br-Br bond.
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Affiliation(s)
- M P de Lara-Castells
- Instituto de Matematicas y Fisica Fundamental (C.S.I.C.), Serrano 123, E-28006-Madrid, Spain.
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Boucher DS, Darr JP, Bradke MD, Loomis RA, McCoy AB. A combined experimental/theoretical investigation of the He + ICl interactions: Determination of the binding energies of the T-shaped and linear He⋯I35Cl(X,v″ = 0) conformers. Phys Chem Chem Phys 2004. [DOI: 10.1039/b411914b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Prosmiti R, Cunha C, Villarreal P, Delgado-Barrio G. Ab initioground state potential energy surfaces for Rg–Br2 (Rg=He, Ne, Ar) complexes. J Chem Phys 2002. [DOI: 10.1063/1.1473800] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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JUNG JAEHOON, SUN HOSUNG. Vibrational structure and predissociation rates of the He-O2vander Waals complex. Mol Phys 2001. [DOI: 10.1080/00268970110078326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Roncero O, Campos-Martı́nez J, Hernández MI, Delgado-Barrio G, Villarreal P, Rubayo-Soneira J. Photodissociation of NeBr2(B) below and above the dissociation limit of Br2(B). J Chem Phys 2001. [DOI: 10.1063/1.1386648] [Citation(s) in RCA: 22] [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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Jung J, Sun H. The vibrational structure and predissociation of the B state of HeBr2 using a simple theoretical method. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00133-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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de Lara-Castells MP, Krems RV, Buchachenko AA, Delgado-Barrio G, Villarreal P. Complete basis set extrapolation limit for electronic structure calculations: Energetic and nonenergetic properties of HeBr and HeBr[sub 2] van der Waals dimers. J Chem Phys 2001. [DOI: 10.1063/1.1415078] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [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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Hernández MI, González-Lezana T, Delgado-Barrio G, Villarreal P, Buchachenko AA. Theoretical simulations of the He79Br2 B, v=8←X, v″=0 excitation spectrum: Spectroscopic manifestation of a linear isomer? J Chem Phys 2000. [DOI: 10.1063/1.1288793] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Buchachenko A, González-Lezana T, Hernández M, de Lara Castells M, Delgado-Barrio G, Villarreal P. Blueshifts of the B←X excitation spectra of He79Br2 using a DIM-based potential. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(99)01452-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Williams J, Rohrbacher A, Seong J, Marianayagam N, Janda KC, Burcl R, Szcześniak MM, Chałasiński G, Cybulski SM, Halberstadt N. A three-dimensional potential energy surface for He+Cl2 (B 3Π0u+): Ab initio calculations and a multiproperty fit. J Chem Phys 1999. [DOI: 10.1063/1.479190] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Rohrbacher A, Ruchti T, Janda KC, Buchachenko AA, Hernández MI, González-Lezana T, Villarreal P, Delgado-Barrio G. A combined experimental-theoretical study of the vibrational predissociation and product rotational distributions for high vibrational levels of He79Br2. J Chem Phys 1999. [DOI: 10.1063/1.478101] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Roncero O, Caloto D, Janda KC, Halberstadt N. From the sparse to the statistical limit of intramolecular vibrational redistribution in vibrational predissociation: ArCl2 as an example. J Chem Phys 1997. [DOI: 10.1063/1.474495] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Buchachenko A, Gonzalez-Lezana T, Hernandez M, Delgado-Barrio G, Villarreal P, Stepanov N. Half- and full-collision VT energy transfer in the HeBr2(B) system. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00296-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Nejad-Sattari M, Stephenson TA. Fragment rotational distributions from the dissociation of NeBr2: Experimental and classical trajectory studies. J Chem Phys 1997. [DOI: 10.1063/1.473570] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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González-Lezana T, Hernández MI, Delgado-Barrio G, Villarreal P. Strongly mixed resonances in the photofragmentation of HeBr2 near Br2(B) dissociation: Stabilization and close-coupling studies. J Chem Phys 1997. [DOI: 10.1063/1.473421] [Citation(s) in RCA: 17] [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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González‐Lezana T, Hernández MI, Delgado‐Barrio G, Buchachenko AA, Villarreal P. Vibrational predissociation dynamics of the He79Br2van der Waals molecule: A quantum mechanical study. J Chem Phys 1996. [DOI: 10.1063/1.472573] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yourshaw I, Zhao Y, Neumark DM. Many‐body effects in weakly bound anion and neutral clusters: Zero electron kinetic energy spectroscopy and threshold photodetachment spectroscopy of ArnBr−(n=2–9) and ArnI−(n=2–19). J Chem Phys 1996. [DOI: 10.1063/1.471893] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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García‐Vela A, Rubayo‐Soneira J, Delgado‐Barrio G, Villarreal P. Quasiclassical dynamics of the I2–Ne2vibrational predissociation: A comparison with experiment. J Chem Phys 1996. [DOI: 10.1063/1.471590] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jahn DG, Barney WS, Cabalo J, Clement SG, Rohrbacher A, Slotterback TJ, Williams J, Janda KC, Halberstadt N. High resolution spectroscopy of the He79Br2 van der Waals molecule: An experimental and theoretical study. J Chem Phys 1996. [DOI: 10.1063/1.471055] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Cybulski SM, Burcl R, Chal/asiński G, Szczȩśniak MM. Partitioning of interaction energy in van der Waals complexes involving excited state species: The He(1S)+Cl2(B 3Πu) interaction. J Chem Phys 1995. [DOI: 10.1063/1.469913] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rubayo-Soneira J, García-Vela A, Delgado-Barrio G, Villarreal P. Vibrational predissociation of I2Ne. A quasiclassical dynamical study. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00851-t] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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