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Sequence congestion and temperature effects on the fluorescence of isolated pyrene molecules

โœ Scribed by T. Deinum; C.J. Werkhoven; J. Langelaar; R.P.H. Rettschnick; J.D.W. van Voorst

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
331 KB
Volume
27
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The temperature dependences of (i) the relative yield of the Sa fluorescence and (ii) the fluorescence decay times measured in the Sr and Ss emission regions of pyrene vapour have been measured at very low pressures. The results demonstrate that the thermal equilibrium distribution of vibrational energy in the electronic ground state of the molecule is transferred to the excited electronic state by the excitation process. This phenomenon is ascribed to sequence congestion effects.

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