Direct observation of vibrational energy dispersal via methyl torsions

Explicit evidence for the role of methyl rotor levels in promoting energy dispersal is reported. A set of coupled zero-order vibration/vibration-torsion (vibtor) levels in the S1 state of para-fluorotoluene (pFT) are investigated. Two-dimensional laser-induced fluorescence (2D-LIF) and two-dimension...

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Main Authors:	Gardner, Adrian M., Tuttle, William D., Whalley, Laura E., Wright, Timothy G.
Format:	Article
Language:	English
Published:	Royal Society of Chemistry 2018
Online Access:	http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/1/Tim%20Wright%20Direct%20Observation%20of%20vibrational%20energy%20dispersal.pdf

id	nottingham-49331
recordtype	eprints
spelling	nottingham-493312018-01-25T14:25:01Z http://eprints.nottingham.ac.uk/49331/ Direct observation of vibrational energy dispersal via methyl torsions Gardner, Adrian M. Tuttle, William D. Whalley, Laura E. Wright, Timothy G. Explicit evidence for the role of methyl rotor levels in promoting energy dispersal is reported. A set of coupled zero-order vibration/vibration-torsion (vibtor) levels in the S1 state of para-fluorotoluene (pFT) are investigated. Two-dimensional laser-induced fluorescence (2D-LIF) and two-dimensional zero-kinetic-energy (2D-ZEKE) spectra are reported, and the assignment of the main features in both sets of spectra reveals that the methyl torsion is instrumental in providing a route for coupling between vibrational levels of different symmetry classes. We find that there is very localized, and selective, dissipation of energy via doorway states, and that, in addition to an increase in the density of states, a critical role of the methyl group is a relaxation of symmetry constraints compared to direct vibrational coupling. Royal Society of Chemistry 2018-01-24 Article PeerReviewed application/pdf en cc_by http://eprints.nottingham.ac.uk/49331/1/Tim%20Wright%20Direct%20Observation%20of%20vibrational%20energy%20dispersal.pdf Gardner, Adrian M. and Tuttle, William D. and Whalley, Laura E. and Wright, Timothy G. (2018) Direct observation of vibrational energy dispersal via methyl torsions. Chemical Science . ISSN 2041-6520 http://pubs.rsc.org/en/Content/ArticleLanding/2018/SC/C7SC05309F#!divAbstract doi:10.1039/C7SC05309F doi:10.1039/C7SC05309F
repository_type	Digital Repository
institution_category	Local University
institution	University of Nottingham Malaysia Campus
building	Nottingham Research Data Repository
collection	Online Access
language	English
description	Explicit evidence for the role of methyl rotor levels in promoting energy dispersal is reported. A set of coupled zero-order vibration/vibration-torsion (vibtor) levels in the S1 state of para-fluorotoluene (pFT) are investigated. Two-dimensional laser-induced fluorescence (2D-LIF) and two-dimensional zero-kinetic-energy (2D-ZEKE) spectra are reported, and the assignment of the main features in both sets of spectra reveals that the methyl torsion is instrumental in providing a route for coupling between vibrational levels of different symmetry classes. We find that there is very localized, and selective, dissipation of energy via doorway states, and that, in addition to an increase in the density of states, a critical role of the methyl group is a relaxation of symmetry constraints compared to direct vibrational coupling.
format	Article
author	Gardner, Adrian M. Tuttle, William D. Whalley, Laura E. Wright, Timothy G.
spellingShingle	Gardner, Adrian M. Tuttle, William D. Whalley, Laura E. Wright, Timothy G. Direct observation of vibrational energy dispersal via methyl torsions
author_facet	Gardner, Adrian M. Tuttle, William D. Whalley, Laura E. Wright, Timothy G.
author_sort	Gardner, Adrian M.
title	Direct observation of vibrational energy dispersal via methyl torsions
title_short	Direct observation of vibrational energy dispersal via methyl torsions
title_full	Direct observation of vibrational energy dispersal via methyl torsions
title_fullStr	Direct observation of vibrational energy dispersal via methyl torsions
title_full_unstemmed	Direct observation of vibrational energy dispersal via methyl torsions
title_sort	direct observation of vibrational energy dispersal via methyl torsions
publisher	Royal Society of Chemistry
publishDate	2018
url	http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/ http://eprints.nottingham.ac.uk/49331/1/Tim%20Wright%20Direct%20Observation%20of%20vibrational%20energy%20dispersal.pdf
first_indexed	2018-09-06T14:05:55Z
last_indexed	2018-09-06T14:05:55Z
_version_	1610867283555516416

Direct observation of vibrational energy dispersal via methyl torsions

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