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- Title
Fine-structure spectroscopy of 2-methylnaphthalene cooled in a supersonic jet.
- Authors
Borisevich, N. A.; D’yachenko, G. G.; Petukhov, V. A.; Semenov, M. A.
- Abstract
The fluorescence and fluorescence excitation spectra of 2-methylnaphthalene molecules cooled in a supersonic jet are measured. The frequencies of vibrations in the S 0 and S 1 states, as well as the relative intensities of electronic-vibrational transitions in the fluorescence and fluorescence excitation spectra, are calculated with the semiempirical MO/M8ST method. The intensities are calculated in the Franck-Condon approximation taking into account the mixing of all the 38 totally symmetric normal vibrations. Based on the calculations, most observed spectral lines are assigned. It is shown that the calculation accuracy of the method is high enough for it to be used to interpret the spectra of molecules of aromatic compounds such as substituted naphthalenes. It is found that the main contribution to the fluorescence spectrum is made by four optically active vibrations.
- Subjects
METHYLNAPHTHALENES; FLUORESCENCE spectroscopy; JETS (Fluid dynamics); SUPERSONIC aerodynamics; ULTRASONICS; SPECTRUM analysis; VIBRATIONAL spectra; FRANCK-Condon principle
- Publication
Optics & Spectroscopy, 2006, Vol 101, Issue 5, p683
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/S0030400X06110063