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Fan JN, Cui TT, Qin ZB, Zheng XF, Cui ZF. Experimental and theoretical study on p-chlorofluorobenzene in the S0, S1 and D0 states. CHINESE J CHEM PHYS 2020. [DOI: 10.1063/1674-0068/cjcp2001005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Jia-nan Fan
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu 241000, China
| | - Ting-ting Cui
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu 241000, China
| | - Zheng-bo Qin
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu 241000, China
| | - Xian-feng Zheng
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu 241000, China
| | - Zhi-feng Cui
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu 241000, China
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2
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Kemp DJ, Fryer EF, Davies AR, Wright TG. Vibration-modified torsional potentials and vibration-torsion (“vibtor”) levels in them-fluorotoluene cation. J Chem Phys 2019; 151:084311. [DOI: 10.1063/1.5116520] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- David J. Kemp
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Elizabeth F. Fryer
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Alexander R. Davies
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Timothy G. Wright
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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3
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Kemp DJ, Tuttle WD, Gardner AM, Whalley LE, Wright TG. Observation of the onset of torsion-induced, mode-specific dissipative intramolecular vibrational redistribution (IVR). J Chem Phys 2019. [DOI: 10.1063/1.5115329] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- David J. Kemp
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - William D. Tuttle
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Adrian M. Gardner
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Laura E. Whalley
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Timothy G. Wright
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Stewart LD, Gascooke JR, Lawrance WD. A strong interaction between torsion and vibration in S0 and S1 m-fluorotoluene. J Chem Phys 2019; 150:174303. [DOI: 10.1063/1.5094454] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Laurence D. Stewart
- College of Science and Engineering, Flinders University, G.P.O. Box 2100, Adelaide SA 5001, Australia
| | - Jason R. Gascooke
- College of Science and Engineering, Flinders University, G.P.O. Box 2100, Adelaide SA 5001, Australia
| | - Warren D. Lawrance
- College of Science and Engineering, Flinders University, G.P.O. Box 2100, Adelaide SA 5001, Australia
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Tuttle WD, Gardner AM, Whalley LE, Kemp DJ, Wright TG. Effects of symmetry, methyl groups and serendipity on intramolecular vibrational energy dispersal. Phys Chem Chem Phys 2019; 21:14133-14152. [DOI: 10.1039/c8cp02757a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Intramolecular vibrational dispersal of vibrational energy is more efficient in the symmetrically-substituted p-xylene molecule than in p-fluorotoluene, p-chlorofluorobenzene or p-difluorobenzene.
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Affiliation(s)
- William D. Tuttle
- School of Chemistry, University of Nottingham, University Park
- Nottingham
- UK
| | - Adrian M. Gardner
- School of Chemistry, University of Nottingham, University Park
- Nottingham
- UK
| | - Laura E. Whalley
- School of Chemistry, University of Nottingham, University Park
- Nottingham
- UK
| | - David J. Kemp
- School of Chemistry, University of Nottingham, University Park
- Nottingham
- UK
| | - Timothy G. Wright
- School of Chemistry, University of Nottingham, University Park
- Nottingham
- UK
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6
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Kemp DJ, Gardner AM, Tuttle WD, Midgley J, Reid KL, Wright TG. Identifying complex Fermi resonances in p-difluorobenzene using zero-electron-kinetic-energy (ZEKE) spectroscopy. J Chem Phys 2018; 149:094301. [DOI: 10.1063/1.5045544] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- David J. Kemp
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Adrian M. Gardner
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - William D. Tuttle
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Jonathan Midgley
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Katharine L. Reid
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Timothy G. Wright
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Gardner AM, Tuttle WD, Whalley LE, Wright TG. Direct observation of vibrational energy dispersal via methyl torsions. Chem Sci 2018; 9:2270-2283. [PMID: 29719700 PMCID: PMC5897844 DOI: 10.1039/c7sc05309f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 01/24/2018] [Indexed: 01/01/2023] Open
Abstract
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.
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Affiliation(s)
- Adrian M Gardner
- School of Chemistry , University of Nottingham , University Park , Nottingham NG7 2RD , UK .
| | - William D Tuttle
- School of Chemistry , University of Nottingham , University Park , Nottingham NG7 2RD , UK .
| | - Laura E Whalley
- School of Chemistry , University of Nottingham , University Park , Nottingham NG7 2RD , UK .
| | - Timothy G Wright
- School of Chemistry , University of Nottingham , University Park , Nottingham NG7 2RD , UK .
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Liu B, Zhao H, Lin X, Li X, Gao M, Wang L, Wang W. Vibronic relaxation dynamics of o-dichlorobenzene in its lowest excited singlet state. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kemp DJ, Whalley LE, Tuttle WD, Gardner AM, Speake BT, Wright TG. Vibrations of the p-chlorofluorobenzene cation. Phys Chem Chem Phys 2018; 20:12503-12516. [DOI: 10.1039/c8cp01274a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vibrational wavenumbers are established for twenty modes of the p-chlorofluorbenzene cation and two Fermi resonances are identified in the S1 state.
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Affiliation(s)
- David J. Kemp
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
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