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Anomalous vibrational relaxation of a hot S*1 state of 3,4-benzpyrene in 2-methylpentane

✍ Scribed by P.A.M. Van Den Bogaardt; R.P.H. Rettschnick; J.D.W. Van Voorst

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
430 KB
Volume
18
Category
Article
ISSN
0009-2614

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✦ Synopsis

Two anomalous emission bands in the fluorescence spectrum of 3,4-benzpyrenc, dissofvcd in 2.methyfpentane. have been studied 2s a function of temperature. These emissions originate from the second excited singlet state S2. and from ;1 vibrationally excited St state (Sy) respectively. From the temperature dependence of the r&rive yield and the decay time of the ST emission it can be conch&d that the vibrational relaxation of this state is hampered. The rate constant for this reIxation process is smaller than 4 X LO' se&-'.

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