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Kłos J, Alexander MH, Dagdigian PJ. The interaction of NO(X2Π) with H2: Ab initio potential energy surfaces and bound states. J Chem Phys 2017; 146:114301. [DOI: 10.1063/1.4977992] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jacek Kłos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Millard H. Alexander
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Paul J. Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
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2
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Dagdigian PJ. Ab initio potential energy surfaces describing the interaction of CH(X2Π) with H2. J Chem Phys 2016. [DOI: 10.1063/1.4962418] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Paul J. Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
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van der Avoird A, Loreau J, Alexander MH, van de Meerakker SYT, Dagdigian PJ. Resonances in rotationally inelastic scattering of NH3 and ND3 with H2. J Chem Phys 2015; 143:044312. [PMID: 26233134 DOI: 10.1063/1.4927074] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ad van der Avoird
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Jérôme Loreau
- Service de Chimie Quantique et Photophysique C. P. 160/09, Université Libre de Bruxelles (ULB), 50 Ave. F. D. Roosevelt, 1050 Brussels, Belgium
| | - Millard H. Alexander
- Department of Chemistry and Biochemistry and Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021, USA
| | | | - Paul J. Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
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Schewe HC, Vanhaecke N, Kłos J, Alexander MH, van de Meerakker SYT, Meijer G, van der Avoird A, Dagdigian PJ. Rotationally inelastic scattering of OH by molecular hydrogen: Theory and experiment. J Chem Phys 2015; 142:204310. [DOI: 10.1063/1.4921562] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H. Christian Schewe
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Nicolas Vanhaecke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
- Laboratoire Aimé Cotton-UMR 9188 CNRS, Université Paris-Sud 11 and Ecole Normale Supérieure Cachan, 91405 Orsay, France
| | - Jacek Kłos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Millard H. Alexander
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Sebastiaan Y. T. van de Meerakker
- Molecular and Laser Physics, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6265 AJ Nijmegen, The Netherlands
| | - Gerard Meijer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Ad van der Avoird
- Theoretical Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6265 AJ Nijmegen, The Netherlands
| | - Paul J. Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
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5
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Kłos J, Alexander MH, van der Avoird A, Dagdigian PJ. The interaction of OH(X2Π) with H2:Ab initiopotential energy surfaces and bound states. J Chem Phys 2014; 141:174309. [DOI: 10.1063/1.4900478] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jacek Kłos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Millard H. Alexander
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Ad van der Avoird
- Theoretical Chemistry, IMM, Radboud University Nijmegen, Heyendaalseweg 135, 6265 AJ Nijmegen, The Netherlands
| | - Paul J. Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
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Abstract
This review focuses on experimental studies of the dynamical outcomes following collisional quenching of electronically excited OH A2Σ+ radicals by molecular partners. The experimental observables include the branching between reactive and nonreactive decay channels, kinetic energy release, and quantum state distributions of the products. Complementary theoretical investigations reveal regions of strong nonadiabatic coupling, known as conical intersections, which facilitate the quenching process. The dynamical outcomes observed experimentally are connected to the local forces and geometric properties of the nuclei in the conical intersection region. Dynamical calculations for the benchmark OH-H2 system are in good accord with experimental observations, demonstrating that the outcomes reflect the strong coupling in the conical intersection region as the system evolves from the excited electronic state to quenched products.
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Affiliation(s)
- Julia H. Lehman
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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7
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Lehman JH, Lester MI, Kłos J, Alexander MH, Dagdigian PJ, Herráez-Aguilar D, Aoiz FJ, Brouard M, Chadwick H, Perkins T, Seamons SA. Electronic Quenching of OH A 2Σ+ Induced by Collisions with Kr Atoms. J Phys Chem A 2013; 117:13481-90. [DOI: 10.1021/jp407035p] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julia H. Lehman
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Marsha I. Lester
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | | | | | - Paul J. Dagdigian
- Department
of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, United States
| | - Diego Herráez-Aguilar
- Departamento
de Quimica Fisica, Facultad de Quimica, Universidad Complutense, Madrid 28040, Spain
| | - F. Javier Aoiz
- Departamento
de Quimica Fisica, Facultad de Quimica, Universidad Complutense, Madrid 28040, Spain
| | - Mark Brouard
- The Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Helen Chadwick
- The Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Tom Perkins
- The Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Scott A. Seamons
- The Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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Fawzy WM, Elsayed M, Zhang Y. Correlated ab initio investigations on the intermolecular and intramolecular potential energy surfaces in the ground electronic state of the O2(-)(X2Πg)-HF(X1Σ+) complex. J Chem Phys 2013; 138:014304. [PMID: 23298038 DOI: 10.1063/1.4772653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This work reports the first highly correlated ab initio study of the intermolecular and intramolecular potential energy surfaces in the ground electronic state of the O(2)(-)(X(2)Π(g))-HF(X(1)Σ(+)) complex. Accurate electronic structure calculations were performed using the coupled cluster method including single and double excitations with addition of the perturbative triples correction [CCSD(T)] with the Dunning's correlation consistent basis sets aug-cc-pVnZ, n = 2-5. Also, the explicitly correlated CCSD(T)-F12a level of theory was employed with the AVnZ basis as well as the Peterson and co-workers VnZ-F12 basis sets with n = 2 and 3. Results of all levels of calculations predicted two equivalent minimum energy structures of planar geometry and C(s) symmetry along the A" surface of the complex, whereas the A' surface is repulsive. Values of the geometrical parameters and the counterpoise corrected dissociation energies (Cp-D(e)) that were calculated using the CCSD(T)-F12a/VnZ-F12 level of theory are in excellent agreement with those obtained from the CCSD(T)/aug-cc-pV5Z calculations. The minimum energy structure is characterized by a very short hydrogen bond of length of 1.328 Å, with elongation of the HF bond distance in the complex by 0.133 Å, and D(e) value of 32.313 Kcal/mol. Mulliken atomic charges showed that 65% of the negative charge is localized on the hydrogen bonded end of the superoxide radical and the HF unit becomes considerably polarized in the complex. These results suggest that the hydrogen bond is an incipient ionic bond. Exploration of the potential energy surface confirmed the identified minimum and provided support for vibrationally induced intramolecular proton transfer within the complex. The T-shaped geometry that possesses C(2v) symmetry presents a saddle point on the top of the barrier to the in-plane bending of the hydrogen above and below the axis that connects centers of masses of the monomers. The height of this barrier is 7.257 Kcal/mol, which is higher in energy than the hydrogen bending frequency by 909.2 cm(-1). The calculated harmonic oscillator vibrational frequencies showed that the H-F stretch vibrational transition in the complex is redshifted by 2564 cm(-1) and gained significant intensity (by at least a factor of 30) with respect to the transition in the HF monomer. These results make the O(2)(-)-HF complex an excellent prototype for infrared spectroscopic investigations on open-shell complexes with vibrationally induced proton transfer.
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Affiliation(s)
- Wafaa M Fawzy
- Department of Chemistry, Murray State University, 1201 Jesse D. Jones Hall, Murray, Kentucky 42071, USA.
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9
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Fawzy WM. Ab Initio Study of the Intermolecular Potential Energy Surface in the Ion-Induced-Dipole Hydrogen-Bonded O2–(X2Πg)–H2(X1Σg+) Complex. J Phys Chem A 2012; 116:1069-76. [DOI: 10.1021/jp2088753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wafaa M. Fawzy
- Department of Chemistry, Murray State University, 1201 Jesse D. Jones Hall, Murray, Kentucky 42071, United States
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10
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Lehman JH, Dempsey LP, Lester MI, Fu B, Kamarchik E, Bowman JM. Collisional quenching of OD AΣ2+ by H2: Experimental and theoretical studies of the state-resolved OD XΠ2 product distribution and branching fraction. J Chem Phys 2010; 133:164307. [DOI: 10.1063/1.3487734] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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WHEELER MARTYND, ANDERSON DAVIDT, TODD MICHAELW, LESTER MARSHAI, KRAUSE PAULJ, CLARY DAVIDC. Mode-selective decay dynamics of the ortho-H2—OH complex: experiment and theory. Mol Phys 2009. [DOI: 10.1080/00268979909482817] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- MARTYN D. WHEELER
- a Department of Chemistry , University of Pennsylvania , Philadelphia , PA , 19104-6323 , USA
| | - DAVID T. ANDERSON
- a Department of Chemistry , University of Pennsylvania , Philadelphia , PA , 19104-6323 , USA
| | - MICHAEL W. TODD
- a Department of Chemistry , University of Pennsylvania , Philadelphia , PA , 19104-6323 , USA
| | - MARSHA I. LESTER
- a Department of Chemistry , University of Pennsylvania , Philadelphia , PA , 19104-6323 , USA
| | - PAUL J. KRAUSE
- b Department of Chemistry , University College London , 20 Gordon Street, London , WC1H 0AJ , UK
| | - DAVID C. CLARY
- b Department of Chemistry , University College London , 20 Gordon Street, London , WC1H 0AJ , UK
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12
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Paterson G, Marinakis S, Costen ML, McKendrick KG. Depolarisation of rotational orientation and alignment of OH (X2Π) in collisions with molecular partners: N2 and O2. Phys Chem Chem Phys 2009; 11:8813-20. [DOI: 10.1039/b909051g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Dempsey LP, Murray C, Cleary PA, Lester MI. Electronic quenching of OH A 2Σ+radicals in single collision events with H2and D2: a comprehensive quantum state distribution of the OH X 2Π products. Phys Chem Chem Phys 2008; 10:1424-32. [DOI: 10.1039/b715611a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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14
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Dempsey LP, Murray C, Lester MI. Product branching between reactive and nonreactive pathways in the collisional quenching of OH AΣ+2 radicals by H2. J Chem Phys 2007; 127:151101. [DOI: 10.1063/1.2800316] [Citation(s) in RCA: 25] [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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15
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Atahan S, Alexander MH. Coupled-states statistical investigation of vibrational and rotational relaxation of OH(2pi) by collisions with atomic hydrogen. J Phys Chem A 2006; 110:5436-45. [PMID: 16623472 DOI: 10.1021/jp055860m] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report state-to-state cross sections and thermal rate constants for vibrational and rotational relaxation of OH(2pi) by collision with H atoms. The cross sections are calculated by the coupled-states (CS) statistical method including the full open-shell character of the OH + H system. Four potential energy surfaces (PESs) ((1,3)A' and (1,3)A'') describe the interaction of OH(X2pi) with H atoms. Of these, three are repulsive, and one (1A') correlates with the deep H2O well. Consequently, rotationally and ro-vibrationally inelastic scattering of OH in collisions with H can occur by scattering on the repulsive PESs, in a manner similar to the inelastic scattering of OH by noble gas atoms, or by collisions which enter the H2O well and then reemerge. At 300 K, we predict large (approximately 1 x 10(-10) cm3 molecule(-1) s(-1)) vibrational relaxation rates out of both v = 2 and v = 1, comparable to earlier experimental observations. This anomalously fast relaxation results from capture into the H2O complex. There exists a significant propensity toward formation of OH in the pi(A') lambda-doublet level. We also report state-resolved cross sections and rate constants for rotational excitation within the OH v = 0 manifold. Collisional excitation from the F1 to the F2 spin-orbit manifold leads to an inverted lambda-doublet population.
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Affiliation(s)
- Sule Atahan
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
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16
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Anderson DT, Lester MI. Controlling the Relative Orientation of Reactants with Intermolecular Forces: Intermolecular State-Dependent Structure in Prereactive H2−OH Complexes. J Phys Chem A 2003. [DOI: 10.1021/jp021809w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David T. Anderson
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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17
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van Beek MC, ter Meulen JJ. The effect of molecular orientation in collisions of OH with CO and N2. J Chem Phys 2001. [DOI: 10.1063/1.1369136] [Citation(s) in RCA: 29] [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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18
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Hoffman BC, Yarkony DR. The role of conical intersections in the nonadiabatic quenching of OH(A 2Σ+) by molecular hydrogen. J Chem Phys 2000. [DOI: 10.1063/1.1322074] [Citation(s) in RCA: 45] [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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19
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Todd MW, Anderson DT, Lester MI. Infrared Spectroscopy and Inelastic Recoil Dynamics of OH Radicals in Complexes with ortho- and para-D2. J Phys Chem A 2000. [DOI: 10.1021/jp000685p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael W. Todd
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - David T. Anderson
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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20
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Wheeler MD, Tsiouris M, Lester MI, Lendvay G. OH vibrational activation and decay dynamics of CH4–OH entrance channel complexes. J Chem Phys 2000. [DOI: 10.1063/1.481232] [Citation(s) in RCA: 36] [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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21
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Affiliation(s)
| | - Jack Simons
- Chemistry Department, University of Utah, Salt Lake City, Utah 84112
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22
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Kaledin AL, Heaven MC, Bowman JM. Potential energy surface and vibrational eigenstates of the H2–CN(X 2Σ+) van der Waals complex. J Chem Phys 1999. [DOI: 10.1063/1.479047] [Citation(s) in RCA: 20] [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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23
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Wheeler MD, Todd MW, Anderson DT, Lester MI. Stimulated Raman excitation of the ortho-H2–OH entrance channel complex. J Chem Phys 1999. [DOI: 10.1063/1.478578] [Citation(s) in RCA: 12] [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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24
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Collisional quenching of OH(A2Σ+, v′=0) by H2O between 211 and 294 K and the development of a unified model for quenching. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00076-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Hossenlopp JM, Anderson DT, Todd MW, Lester MI. State-to-state inelastic scattering from vibrationally activated OH–H2 complexes. J Chem Phys 1998. [DOI: 10.1063/1.477769] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Ochoa de Aspuru G, Clary DC. New Potential Energy Function for Four-Atom Reactions. Application to OH + H2. J Phys Chem A 1998. [DOI: 10.1021/jp982433i] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - David C. Clary
- Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, U.K
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27
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Krause PJ, Clary DC, Anderson DT, Todd MW, Schwartz RL, Lester MI. Time-resolved dissociation of the H2–OH entrance channel complex. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00869-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Anderson DT, Schwartz RL, Todd MW, Lester MI. Infrared spectroscopy and time-resolved dynamics of the ortho-H2–OH entrance channel complex. J Chem Phys 1998. [DOI: 10.1063/1.476941] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Lester MI, Loomis RA, Schwartz RL, Walch SP. Electronic Quenching of OH A 2Σ+ (v‘ = 0, 1) in Complexes with Hydrogen and Nitrogen. J Phys Chem A 1997. [DOI: 10.1021/jp9727557] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Richard A. Loomis
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Rebecca L. Schwartz
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Stephen P. Walch
- NASA Ames Research Center, Thermosciences Institute, MS-230-3, Moffett Field, California 94035-1000
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30
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Affiliation(s)
- K. Schreel
- Molecular and Laser Physics, University of Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
| | - J. J. ter Meulen
- Molecular and Laser Physics, University of Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
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31
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Kovalenko LJ, Delos JB. Semiclassical picture of collision-induced Λ-doublet transitions in diatomic molecules. J Chem Phys 1997. [DOI: 10.1063/1.474252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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32
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Abstract
The entrance channel to the OH+H2-->H2O+H hydrogen abstraction reaction has been investigated from several different experimental approaches and complementary theoretical calculations. Weakly bound complexes between the hydroxyl radical and molecular hydrogen have been stabilized within a shallow well in the entrance channel and characterized via electronic spectroscopy on the OH A2Sigma+-X2Pi transition. Laser-induced fluorescence and fluorescence depletion experiments have revealed the binding energy of H2/D2 with ground state OH X2Pi radicals, the intermolecular energy levels supported by the OH A2Sigma+ (v'=0,1)+H2/D2 potential, and the OH-H2/D2 excited state dissociation limit. The OH X2Pi + H2 potentials have also been examined through inelastic scattering measurements on Lambda-doublet state-selected OH with normal or para-H2. Finally, photodetachment of an electron from the H3O- anion enabled the neutral reaction to be probed in conformations sampled by the two isomeric forms of the anion.
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Affiliation(s)
- R A Loomis
- JILA, National Institute of Standards and Technology and University of Colorado, University of Colorado, Boulder, CO 80309-0440, USA
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33
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Schwartz RL, Anderson DT, Todd MW, Lester MI. Infrared spectroscopy of OHH2 entrance channel complexes. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00597-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Schreel K, ter Meulen J. Determination of Λ‐doublet resolved cross‐sections for inelastic scattering of OH by para‐ and normal‐H2. J Chem Phys 1996. [DOI: 10.1063/1.472328] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Bačić Z, Miller RE. Molecular Clusters: Structure and Dynamics of Weakly Bound Systems. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960574j] [Citation(s) in RCA: 145] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zlatko Bačić
- Department of Chemistry, New York University, New York, New York 10003
| | - Roger E. Miller
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
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36
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Loomis RA, Schwartz RL, Lester MI. Electronic spectroscopy and quenching dynamics of OH–H2/D2pre‐reactive complexes. J Chem Phys 1996. [DOI: 10.1063/1.471408] [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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37
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Yang M, Alexander MH. Ab initio potential energy surfaces and quantum scattering studies of NO(X 2Π) with He: Λ‐doublet resolved rotational and electronic fine‐structure transitions. J Chem Phys 1995. [DOI: 10.1063/1.470323] [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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38
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