Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields

Studies of ultrafast molecular dynamics induced by intense laser fields can reveal new approaches to manipulating chemical reactions in the strong-field regime. Here, we show that intense few-cycle laser pulses can induce the spin–orbit state-selective C–I dissociation of the iodomethane cation (CH3...

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Main Authors: Wei, Zhengrong, Li, Jialin, See, Soo Teck, Loh, Zhi-Heng
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/84898
http://hdl.handle.net/10220/49164
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-848982023-10-24T01:30:13Z Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields Wei, Zhengrong Li, Jialin See, Soo Teck Loh, Zhi-Heng School of Physical and Mathematical Sciences Centre for Optical Fibre Technology The Photonics Institute Dissociation Dynamics Laser Fields Science::Chemistry::Biochemistry Studies of ultrafast molecular dynamics induced by intense laser fields can reveal new approaches to manipulating chemical reactions in the strong-field regime. Here, we show that intense few-cycle laser pulses can induce the spin–orbit state-selective C–I dissociation of the iodomethane cation (CH3I+) in the X̃ electronic state. Irradiation of CH3I by 6 fs laser pulses with peak intensities of 1.9 × 1014 W/cm2 followed by femtosecond extreme ultraviolet probing of the iodine 4d core-level transitions reveals dissociation of the CH3I+X̃2E1/2 state with a time constant of 0.76 ± 0.16 ps. By contrast, the X̃2E3/2 spin–orbit ground state does not exhibit any appreciable dissociation on the picosecond time scale. The observed spin–orbit state-selective dissociation of the X̃ state is rationalized in terms of the laser-induced coupling to the à state. Our results suggest that the intense-laser control of photodissociation channels can be potentially extended to spin–orbit split states. 2019-07-05T08:23:58Z 2019-12-06T15:53:18Z 2019-07-05T08:23:58Z 2019-12-06T15:53:18Z 2017 Journal Article Wei, Z., Li, J., See, S. T., & Loh, Z.-H. (2017). Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields. Journal of Physical Chemistry Letters, 8(24), 6067-6072. doi:10.1021/acs.jpclett.7b03022 https://hdl.handle.net/10356/84898 http://hdl.handle.net/10220/49164 10.1021/acs.jpclett.7b03022 en Journal of Physical Chemistry Letters 10.21979/N9/KVF8BP © 2017 American Chemical Society. All rights reserved. This paper was published in Journal of Physical Chemistry Letters and is made available with permission of American Chemical Society. 22 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Dissociation Dynamics
Laser Fields
Science::Chemistry::Biochemistry
spellingShingle Dissociation Dynamics
Laser Fields
Science::Chemistry::Biochemistry
Wei, Zhengrong
Li, Jialin
See, Soo Teck
Loh, Zhi-Heng
Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
description Studies of ultrafast molecular dynamics induced by intense laser fields can reveal new approaches to manipulating chemical reactions in the strong-field regime. Here, we show that intense few-cycle laser pulses can induce the spin–orbit state-selective C–I dissociation of the iodomethane cation (CH3I+) in the X̃ electronic state. Irradiation of CH3I by 6 fs laser pulses with peak intensities of 1.9 × 1014 W/cm2 followed by femtosecond extreme ultraviolet probing of the iodine 4d core-level transitions reveals dissociation of the CH3I+X̃2E1/2 state with a time constant of 0.76 ± 0.16 ps. By contrast, the X̃2E3/2 spin–orbit ground state does not exhibit any appreciable dissociation on the picosecond time scale. The observed spin–orbit state-selective dissociation of the X̃ state is rationalized in terms of the laser-induced coupling to the à state. Our results suggest that the intense-laser control of photodissociation channels can be potentially extended to spin–orbit split states.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Wei, Zhengrong
Li, Jialin
See, Soo Teck
Loh, Zhi-Heng
format Article
author Wei, Zhengrong
Li, Jialin
See, Soo Teck
Loh, Zhi-Heng
author_sort Wei, Zhengrong
title Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
title_short Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
title_full Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
title_fullStr Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
title_full_unstemmed Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
title_sort spin–orbit state-selective c–i dissociation dynamics of the ch3i+ x̃ electronic state induced by intense few-cycle laser fields
publishDate 2019
url https://hdl.handle.net/10356/84898
http://hdl.handle.net/10220/49164
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