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Vibrationally Resolved LIF Spectrum of Tertiary Methylcyclohexoxy Radical.
- Source :
-
Journal of Physical Chemistry A . Mar2012, Vol. 116 Issue 12, p3156-3162. 7p. - Publication Year :
- 2012
-
Abstract
- Cyclohexoxy radical and its substitutes are intermediates of the combustion reaction in automobile engines, and hence play an important role in the atmospheric chemistry. Spectroscopic and conformational studies can provide convenient methods to monitor these species. In this work, we report the observation of the laser induced fluorescence (LIF) excitation spectrum of 1-methylcyclohexoxy, a tertiary ring alkoxy radical, in supersonic jet condition. The spectrum was assigned preliminarily to the chair-axial and chair-equatorial conformers of 1-methylcyclohexoxy. No CâO stretch progression was observed in 1-methylcyclohexoxy spectrum, which was different from t-butoxy. The short lifetime of excited state 1-methylcyclohexoxy and increased CâO bond length suggested a less stable excited state induced by the increased steric repulsion via methyl substitution on the alkoxy carbon. Dissociation rather than H transfer was suggested as the major nonradiative relaxation process, which competed with the fluorescence path. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10895639
- Volume :
- 116
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 80743044
- Full Text :
- https://doi.org/10.1021/jp211888c