Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction

The hydrogen abstraction reaction from H2S by OH is of key importance in understanding of the causes of acid rain, air pollution, and climate change. In this work, the reaction OH+H2S → H2O+SH is investigated on a recently developed ab initio-based globally accurate potential energy surface by the t...

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Main Authors: Xiang, Haipan, Lu, Yunpeng, Song, Hongwei, Yang, Minghui
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/161479
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1614792023-02-28T20:05:32Z Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction Xiang, Haipan Lu, Yunpeng Song, Hongwei Yang, Minghui School of Physical and Mathematical Sciences Science::Chemistry Mode Specificity Quantum Dynamics The hydrogen abstraction reaction from H2S by OH is of key importance in understanding of the causes of acid rain, air pollution, and climate change. In this work, the reaction OH+H2S → H2O+SH is investigated on a recently developed ab initio-based globally accurate potential energy surface by the time-dependent wave packet approach under a reduced-dimensional model. This reaction behaves like a barrier-less reaction at low collision energies and like an activated reaction with a well-defined barrier at high collision energies. Exciting either the symmetric or antisymmetric stretching mode of the molecule H2S enhances the reactivity more than exciting the bending mode, which is rationalized by the coupling strength of each normal mode with the reaction coordinate. In addition, the modespecific rate constant shows a remarkable non-Arrhenius temperature dependence. Ministry of Education (MOE) Published version This work was supported by the National Natural Science Foundation of China (No.21973109 to Hongwei Song, No.21773297, No.21973108, and No.21921004 to Minghui Yang) and the Ministry of Education, Singapore, under its Academic Research Fund Tier 1 (RG83/20) to Yunpeng Lu. 2022-09-05T07:34:15Z 2022-09-05T07:34:15Z 2022 Journal Article Xiang, H., Lu, Y., Song, H. & Yang, M. (2022). Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction. Chinese Journal of Chemical Physics, 35(1), 200-206. https://dx.doi.org/10.1063/1674-0068/cjcp2112278 1674-0068 https://hdl.handle.net/10356/161479 10.1063/1674-0068/cjcp2112278 2-s2.0-85127857330 1 35 200 206 en RG83/20 Chinese Journal of Chemical Physics © 2022 Chinese Physical Society. All rights reserved. This paper was published by American Institute of Physics in Chinese Journal of Chemical Physics and is made available with permission of Chinese Physical Society. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Chemistry
Mode Specificity
Quantum Dynamics
spellingShingle Science::Chemistry
Mode Specificity
Quantum Dynamics
Xiang, Haipan
Lu, Yunpeng
Song, Hongwei
Yang, Minghui
Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
description The hydrogen abstraction reaction from H2S by OH is of key importance in understanding of the causes of acid rain, air pollution, and climate change. In this work, the reaction OH+H2S → H2O+SH is investigated on a recently developed ab initio-based globally accurate potential energy surface by the time-dependent wave packet approach under a reduced-dimensional model. This reaction behaves like a barrier-less reaction at low collision energies and like an activated reaction with a well-defined barrier at high collision energies. Exciting either the symmetric or antisymmetric stretching mode of the molecule H2S enhances the reactivity more than exciting the bending mode, which is rationalized by the coupling strength of each normal mode with the reaction coordinate. In addition, the modespecific rate constant shows a remarkable non-Arrhenius temperature dependence.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Xiang, Haipan
Lu, Yunpeng
Song, Hongwei
Yang, Minghui
format Article
author Xiang, Haipan
Lu, Yunpeng
Song, Hongwei
Yang, Minghui
author_sort Xiang, Haipan
title Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
title_short Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
title_full Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
title_fullStr Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
title_full_unstemmed Mode-specific quantum dynamics study of OH+H₂S → H₂O+SH reaction
title_sort mode-specific quantum dynamics study of oh+h₂s → h₂o+sh reaction
publishDate 2022
url https://hdl.handle.net/10356/161479
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