Fluorescence excitation spectra of 1-methyl-, 2-methyl-, and 2-ethyl-naphthalenes in a supersonic free jet.
Open Access
- 1 January 1985
- journal article
- Published by The Spectroscopical Society of Japan in Journal of the Spectroscopical Society of Japan
- Vol. 34 (2) , 83-87
- https://doi.org/10.5111/bunkou.34.83
Abstract
Fluorescence excitation spectra of 1-methyl-, 2-methyl- and 2-ethyl-naphthalenes have been observed with the excitation of a xenon lamp in a supersonic free jet. The excitation spectrum of 1-methylnaphthalene was much the same with that of naphthalene, while 2-methyl- and 2-ethyl-naphthalene molecules exhibited entirely different spectral profile from 1-methylnaphthalene. Methylation or ethylation on the position 2 of naphthalene ring caused an increase of the origin intensity and changes of vibronic band frequency, which can be explained by symmetry reduction and mode mixing.Keywords
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