Intermediate strong coupling and vibrational redistribution effects in the S2 emission of pyrene
β Scribed by T. Deinum; C.J. Werkhoven; J. Langelaar; R.P.H. Rettschnick; J.D.W. van Voorst
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 321 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
ginents are given that'the dppemuxe of 8 short component & ke !+otescen& de&y oipyrene dter excitatian in a '&b&c o&ii of the S,-' S i transition, has to be os$!Jed to a red~tri~~~ion of vibrational ineigy of the inducing mode ovw the otke; vibrational'modes in the molecule.
The fluorescence decly of pyrene vapour, excited into the SI-state with a frequency doubled ruby-&r pulse : (28800 an-') .has been studio unda conditions where the excited molearles are c4lisionally unperturbed. The fluorescence decay curye can be de&i as a Sum of two exponential components. The ch&
Fluorescence decay times measured in the S1 and Sz emission regions are reported for a number of aromatic hydrocarbons in the vapour phase at low pressures. In contrast to the theory which applies to the intermediate strong coupling case, the decay times of the S2 emission are significantly shorter
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 evaluat