This research examines the nonadiabatic dynamics of cyclobutanone after excitation into the n → 3s Rydberg S2 state. It stems from our contribution to the Special Topic of the Journal of Chemical Physics to test the predictive capability of computational chemistry against unseen experimental data. Decoherence-corrected fewest-switches surface hopping was used to simulate nonadiabatic dynamics with full and approximated nonadiabatic couplings. Several simulation sets were computed with different electronic structure methods, including a multiconfigurational wavefunction [multiconfigurational self-consistent field (MCSCF)] specially built to describe dissociative channels, multireference semiempirical approach, time-dependent density functional theory, algebraic diagrammatic construction, and coupled cluster. MCSCF dynamics predicts a slow deactivation of the S2 state (10 ps), followed by an ultrafast population transfer from S1 to S0 (<100 fs). CO elimination (C3 channel) dominates over C2H4 formation (C2 channel). These findings radically differ from the other methods, which predicted S2 lifetimes 10–250 times shorter and C2 channel predominance. These results suggest that routine electronic structure methods may hold low predictive power for the outcome of nonadiabatic dynamics.
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21 April 2024
Research Article|
April 16 2024
Prediction Challenge: Simulating Rydberg photoexcited cyclobutanone with surface hopping dynamics based on different electronic structure methods Available to Purchase
Special Collection:
Prediction Challenge: Cyclobutanone Photochemistry
Saikat Mukherjee
;
Saikat Mukherjee
a)
(Data curation, Formal analysis, Investigation, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Aix Marseille University, CNRS, ICR
, Marseille 13397, France
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Rafael S. Mattos
;
Rafael S. Mattos
(Data curation, Formal analysis, Investigation, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Aix Marseille University, CNRS, ICR
, Marseille 13397, France
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Josene M. Toldo
;
Josene M. Toldo
(Data curation, Formal analysis, Investigation, Validation, Visualization, Writing – review & editing)
1
Aix Marseille University, CNRS, ICR
, Marseille 13397, France
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Hans Lischka
;
Hans Lischka
(Methodology, Writing – review & editing)
2
Department of Chemistry and Biochemistry, Texas Tech University
, Lubbock, Texas 79409-1061, USA
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Mario Barbatti
Mario Barbatti
a)
(Funding acquisition, Methodology, Project administration, Resources, Supervision, Visualization, Writing – original draft, Writing – review & editing)
1
Aix Marseille University, CNRS, ICR
, Marseille 13397, France
3
Institut Universitaire de France
, Paris 75231, France
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Saikat Mukherjee
1,a)
Rafael S. Mattos
1
Josene M. Toldo
1
Hans Lischka
2
Mario Barbatti
1,3,a)
1
Aix Marseille University, CNRS, ICR
, Marseille 13397, France
2
Department of Chemistry and Biochemistry, Texas Tech University
, Lubbock, Texas 79409-1061, USA
3
Institut Universitaire de France
, Paris 75231, France
J. Chem. Phys. 160, 154306 (2024)
Article history
Received:
February 15 2024
Accepted:
March 28 2024
Citation
Saikat Mukherjee, Rafael S. Mattos, Josene M. Toldo, Hans Lischka, Mario Barbatti; Prediction Challenge: Simulating Rydberg photoexcited cyclobutanone with surface hopping dynamics based on different electronic structure methods. J. Chem. Phys. 21 April 2024; 160 (15): 154306. https://doi.org/10.1063/5.0203636
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