We have generated the p-chlorobenzyl radical in supersonic free expansion, and measured the laser-induced fluorescence (LIF) excitation spectra and LIF dispersed spectra from single vibronic levels (SVL). Based on an analysis of the dispersed spectra, we find the two band origins, spaced only 94 cm-
Laser-induced fluorescence excitation spectra of jet-cooled chrysene
โ Scribed by Haiping Yu; Evelyn Joslin; David Phillips
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 669 KB
- Volume
- 203
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Tbe laser-induced fluorescence excitation spectmm of the S,+& transition of jet-cooled chrysene is reported for the first time in the range 26500-29800 cm-l, together with experimentally recorded rovibronic band contours of six of the more active transitions in the spectrum. A preliminary analysis of vibronic features of the first excited singlet state is given, based primarily on ground state vibrational assignments together with comparison of the fluorescence spectra of other jet-cooled polycyclic benzenoid hydrocarbons. An intense progression in the out-of-plane buttefiyingmotion is observed. The weak transition at 26595 cm-' is assigned to the origin band in this molecule, which is shifted about 1000 cm-' to the red of the S, origin reported by others.
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