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Single-Vibronic-Level Fluorescence Spectra of 1,4-Benzodioxan in a Supersonic Jet

โœ Scribed by R.D. Gordon; J.M. Hollas

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
811 KB
Volume
163
Category
Article
ISSN
0022-2852

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โœฆ Synopsis

The laser-induced fluorescence excitation spectrum near (281 \mathrm{~nm}) of 1,4-benzodioxan has been studied in a supersonic jet, and dispersed single-vibronic-level fluorescence spectra have been obtained following excitation into 18 different (S_{1}) levels. Fundamentals have been determined for 14 vibrational modes in both the (S_{0}) and (S_{1}) electronic states. As might be expected for a molecule of only (C_{2}) symmetry (the partially saturated six-membered ring has a twisted conformation). Duschinsky mixing has been observed for five of these modes, the (S_{1}) normal coordinate being a mixture of two or more (S_{0}) coordinates. The fluorescence excitation spectrum is complicated by at least five well-documented instances of Fermi resonance. 1994 Academic Press. Inc.

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