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Theoretical H + O3 rate coefficients from ring polymer molecular dynamics on an accurate global potential energy surface: assessing experimental uncertainties
Journal Article·· Physical Chemistry Chemical Physics. PCCP
Thermal rate coefficients and kinetic isotope effects have been calculated for an important atmospheric reaction H/D + O3 → OH/OD + O2 based on an accurate permutation invariant polynomial-neural network potential energy surface, using ring polymer molecular dynamics (RPMD), quasi-classical trajectory (QCT) and variational transition-state theory (VTST) with multidimensional tunneling. The RPMD approach yielded results that are generally in better agreement with experimental rate coefficients than the VTST and QCT ones, especially at low temperatures, attributable to its capacity to capture quantum effects such as tunneling and zero-point energy. Additionally, the theoretical results support one group of existing experiments over the other. In addition, rate coefficients for the D + O3 → OD + O2 reaction are also reported using the same methods, which will allow a stringent assessment of future experimental measurements, thus helping to reduce the uncertainty in the recommended rate coefficients of this reaction.
Chen, Qixin, et al. "Theoretical H + O<sub>3</sub> rate coefficients from ring polymer molecular dynamics on an accurate global potential energy surface: assessing experimental uncertainties." Physical Chemistry Chemical Physics. PCCP, vol. 23, no. 5, Dec. 2020. https://doi.org/10.1039/d0cp05771a
Chen, Qixin, Hu, Xixi, Guo, Hua, & Xie, Daiqian (2020). Theoretical H + O<sub>3</sub> rate coefficients from ring polymer molecular dynamics on an accurate global potential energy surface: assessing experimental uncertainties. Physical Chemistry Chemical Physics. PCCP, 23(5). https://doi.org/10.1039/d0cp05771a
Chen, Qixin, Hu, Xixi, Guo, Hua, et al., "Theoretical H + O<sub>3</sub> rate coefficients from ring polymer molecular dynamics on an accurate global potential energy surface: assessing experimental uncertainties," Physical Chemistry Chemical Physics. PCCP 23, no. 5 (2020), https://doi.org/10.1039/d0cp05771a
@article{osti_1852058,
author = {Chen, Qixin and Hu, Xixi and Guo, Hua and Xie, Daiqian},
title = {Theoretical H + O<sub>3</sub> rate coefficients from ring polymer molecular dynamics on an accurate global potential energy surface: assessing experimental uncertainties},
annote = {Thermal rate coefficients and kinetic isotope effects have been calculated for an important atmospheric reaction H/D + O3 → OH/OD + O2 based on an accurate permutation invariant polynomial-neural network potential energy surface, using ring polymer molecular dynamics (RPMD), quasi-classical trajectory (QCT) and variational transition-state theory (VTST) with multidimensional tunneling. The RPMD approach yielded results that are generally in better agreement with experimental rate coefficients than the VTST and QCT ones, especially at low temperatures, attributable to its capacity to capture quantum effects such as tunneling and zero-point energy. Additionally, the theoretical results support one group of existing experiments over the other. In addition, rate coefficients for the D + O3 → OD + O2 reaction are also reported using the same methods, which will allow a stringent assessment of future experimental measurements, thus helping to reduce the uncertainty in the recommended rate coefficients of this reaction.},
doi = {10.1039/d0cp05771a},
url = {https://www.osti.gov/biblio/1852058},
journal = {Physical Chemistry Chemical Physics. PCCP},
issn = {ISSN PPCPFQ},
number = {5},
volume = {23},
place = {United States},
publisher = {Royal Society of Chemistry},
year = {2020},
month = {12}}