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Multidimensional effects in nonadiabatic statistical theories of spin- forbidden kinetics. A case study of 3O + CO → CO2

Journal Article · · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
DOI:https://doi.org/10.1021/jp512942w· OSTI ID:1235293
 [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
The appropriateness of treating crossing seams of electronic states of different spins as nonadiabatic transition states in statistical calculations of spin-forbidden reaction rates is considered. We show that the spin-forbidden reaction coordinate, the nuclear coordinate perpendicular to the crossing seam, is coupled to the remaining nuclear degrees of freedom. We found that this coupling gives rise to multidimensional effects that are not typically included in statistical treatments of spin-forbidden kinetics. Three qualitative categories of multidimensional effects may be identified: static multidimensional effects due to the geometry-dependence of the local shape of the crossing seam and of the spin–orbit coupling, dynamical multidimensional effects due to energy exchange with the reaction coordinate during the seam crossing, and nonlocal(history-dependent) multidimensional effects due to interference of the electronic variables at second, third, and later seam crossings. Nonlocal multidimensional effects are intimately related to electronic decoherence, where electronic dephasing acts to erase the history of the system. A semiclassical model based on short-time full-dimensional trajectories that includes all three multidimensional effects as well as a model for electronic decoherence is presented. The results of this multidimensional nonadiabatic statistical theory (MNST) for the 3O + CO → CO2 reaction are compared with the results of statistical theories employing one-dimensional (Landau–Zener and weak coupling) models for the transition probability and with those calculated previously using multistate trajectories. The MNST method is shown to accurately reproduce the multistate decay-of-mixing trajectory results, so long as consistent thresholds are used. Furthermore, the MNST approach has several advantages over multistate trajectory approaches and is more suitable in chemical kinetics calculations at low temperatures and for complex systems. The error in statistical calculations that neglect multidimensional effects is shown to be as large as a factor of 2 for this system, with static multidimensional effects identified as the largest source of error.
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1235293
Report Number(s):
SAND--2015-0159J; 560414
Journal Information:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 28 Vol. 119; ISSN 1089-5639
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (69)

Decoherence in Combined Quantum Mechanical and Classical Mechanical Methods for Dynamics as Illustrated for Non-Born–Oppenheimer Trajectories book January 2007
The singlet and triplet states of phenyl cation. A hybrid approach for locating minimum energy crossing points between non-interacting potential energy surfaces
  • Harvey, Jeremy N.; Aschi, Massimiliano; Schwarz, Helmut
  • Theoretical Chemistry Accounts: Theory, Computation, and Modeling (Theoretica Chimica Acta), Vol. 99, Issue 2 https://doi.org/10.1007/s002140050309
journal April 1998
Determination of the lowest energy point on the crossing seam between two potential surfaces using the energy gradient journal September 1985
Ab initio calculation of anharmonic constants for a transition state, with application to semiclassical transition state tunneling probabilities journal August 1990
Comparison of trajectory surface-hopping and Monte Carlo phase-space theory predissociation rate constants for N2O journal July 1993
High pressure studies of moist carbon monoxide / nitrous oxide kinetics journal May 1997
Thermal dissociation and recombination of polyatomic molecules journal January 1975
Ab initio study of spin-forbidden unimolecular decomposition of carbon dioxide journal June 2000
Non-Born−Oppenheimer Molecular Dynamics journal February 2006
Importance of nonseparability in quantum mechanical transition-state theory journal August 1976
Modeling the Kinetics of Bimolecular Reactions journal November 2006
Nonadiabatic unimolecular reactions. 1. A statistical formulation for the rate constants journal August 1988
A general small-curvature approximation for transition-state-theory transmission coefficients journal October 1981
Symmetry-Forbidden vs Symmetry-Allowed Electron and Hole Transfer in Medium Sized Intramolecular Organic Donor−Acceptor Radical Ions. A Trajectory Surface Hopping Study journal April 2002
The Landau−Zener Formula journal May 2005
Semiclassical Treatment of Thermally Activated Electron Transfer in the Intermediate to Strong Electronic Coupling Regime under the Fast Dielectric Relaxation journal June 2006
Dynamics of Nonadiabatic Chemical Reactions journal September 2006
Semiclassical Treatment of Thermally Activated Electron Transfer in the Inverted Region under the Fast Dielectric Relaxation journal February 2007
Sums and Densities of Fully Coupled Anharmonic Vibrational States: A Comparison of Three Practical Methods journal February 2010
Algorithms for Sampling a Quantum Microcanonical Ensemble of Harmonic Oscillators at Potential Minima and Conical Intersections journal June 2011
Fewest-Switches Surface Hopping and Decoherence in Multiple Dimensions journal November 2011
Improved Multidimensional Semiclassical Tunneling Theory journal November 2013
Anharmonic Rovibrational Numbers and Densities of States for HO 2 , H 2 CO, and H 2 O 2 journal February 2009
Ab Initio Wavenumber Accurate Spectroscopy: 1 CH 2 and HCN Vibrational Levels on Automatically Generated IMLS Potential Energy Surfaces journal April 2009
Anharmonic Vibrational Properties from Intrinsic n -Mode State Densities journal July 2013
Theoretical and Experimental Spectroscopy of the S 2 State of CHF and CDF: Dynamically Weighted Multireference Configuration Interaction Calculations for High-Lying Electronic States journal January 2010
Understanding the kinetics of spin-forbidden chemical reactions journal January 2007
Spin-forbidden dehydrogenation of methoxy cation: a statistical view journal January 1999
The transition state method journal January 1938
Nonadiabatic transition-state theory: A Monte Carlo study of competing bond fission processes in bromoacetyl chloride journal January 2001
Fewest-switches with time uncertainty: A modified trajectory surface-hopping algorithm with better accuracy for classically forbidden electronic transitions journal April 2002
Theoretical studies of intersystem crossing effects in the O(3P, 1D)+H2 reaction journal December 2003
Critical evaluation of approximate quantum decoherence rates for an electronic transition in methanol solution journal February 2004
Non-Born–Oppenheimer trajectories with self-consistent decay of mixing journal March 2004
Dynamically weighted multiconfiguration self-consistent field: Multistate calculations for F+H2O→HF+OH reaction paths journal April 2004
On the reactions of N 2 with O journal September 1973
Collision complex model for spin forbidden reactions: Quenching of O( 1 D ) by N 2 journal July 1974
Quantum mechanical transition state theory and a new semiclassical model for reaction rate constants journal September 1974
Coherent switching with decay of mixing: An improved treatment of electronic coherence for non-Born–Oppenheimer trajectories journal January 2004
Evaluation of canonical and microcanonical nonadiabatic reaction rate constants by using the Zhu–Nakamura formulas journal November 2004
Conical intersections and semiclassical trajectories: Comparison to accurate quantum dynamics and analyses of the trajectories journal January 2005
Electronic decoherence time for non-Born-Oppenheimer trajectories journal August 2005
Non-Born-Oppenheimer molecular dynamics of Na⋯FH photodissociation journal November 2007
Interpolating moving least-squares methods for fitting potential energy surfaces: A strategy for efficient automatic data point placement in high dimensions journal February 2008
Coupled-surface investigation of the photodissociation of NH3(Ã): Effect of exciting the symmetric and antisymmetric stretching modes journal June 2009
Including quantum decoherence in surface hopping journal October 2010
Theoretical treatment of quenching in O( 1 D ) + N 2 collisions journal February 1975
Unified statistical model for ’’complex’’ and ’’direct’’ reaction mechanisms journal September 1976
A new tunneling path for reactions such as H+H2→H2+H journal January 1977
A classical analog for electronic degrees of freedom in nonadiabatic collision processes journal April 1979
Classical transition state theory is exact if the transition state is unique journal January 1979
Application of unimolecular reaction rate theory for highly flexible transition states to the dissociation of NCNO into NC and NO journal October 1988
Test of the accuracy of small‐curvature and minimum‐energy reference paths for parametrizing the search for least‐action tunneling paths: (H,D)+H’Br→(H,D)Br+H’ journal March 1989
An exact trajectory surface hopping procedure: Comparison with exact quantal calculations journal October 1989
Molecular dynamics with electronic transitions journal July 1990
A phase‐space theory and Monte Carlo sampling method for studying nonadiabatic unimolecular reactions journal February 1992
Theory of nonadiabatic transition for general two‐state curve crossing problems. I. Nonadiabatic tunneling case journal December 1994
Theory of nonadiabatic transition for general two‐state curve crossing problems. II. Landau–Zener case journal May 1995
Nonadiabatic transition state theory and multiple potential energy surface molecular dynamics of infrequent events journal November 1995
Statistical model for nonadiabatic decay of an exciplex strongly coupled to a dissociative continuum journal July 1997
Decoherence-induced surface hopping journal December 2012
The spin-forbidden reaction CH(2Π)+N2→HCN+N(4S) revisited. II. Nonadiabatic transition state theory and application journal May 1999
Anharmonic state counts and partition functions for molecules via classical phase space integrals in curvilinear coordinates journal May 2013
Non-Born–Oppenheimer molecular dynamics of the spin-forbidden reaction O( 3 P) + CO( X  1 Σ + ) → CO 2 (X̃Σg+1) journal October 2013
Spin-orbit matrix elements for internally contracted multireference configuration interaction wavefunctions journal November 2000
The two-state S matrix for the Landau-Zener potential curve crossing model: predissociation and resonant scattering journal December 1985
Non-Adiabatic Crossing of Energy Levels journal September 1932
Nonadiabatic Dynamics book April 1998
Electron Transfer rate Uniformly Valid from Nonadiabatic to Adiabatic Regime Based on the Zhu–Nakamura Theory journal January 2006

Cited By (3)

Mechanism and rate constants of the CH 2 + CH 2 CO reactions in triplet and singlet states: A theoretical study journal October 2018
Nonadiabatic transition state theory: Application to intersystem crossings in the active sites of metal-sulfur proteins journal March 2016
Nonadiabatic dynamics simulations on internal conversion and intersystem crossing processes in gold( i ) compounds journal July 2018

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