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Vibronic coupling and intramolecular dynamics of pyrene as revealed by the S0→S2 excitation spectrum in a supersonic jet

✍ Scribed by Nobuhiro Ohta; Hiroaki Baba; Giancarlo Marconi


Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
664 KB
Volume
133
Category
Article
ISSN
0009-2614

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✦ Synopsis


The fluorescence excitation spectrum of pyrene obtained in a supersonic jet for the S ,_,-+Sz transition shows a complicated structure due to the interaction of discrete levels of S, with the quasi-continuous levels belonging to S,. The intensity distribution pattern in this region has been evaluated from quantum-mechanically calculated quantities, such as the vibronic coupling integrals, and Franck-Condon factors deduced from independent experiments. The dynamics in pyrene following excitation into Sz are discussed.


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