Anomalous vibrational relaxation of a hot S*1 state of 3,4-benzpyrene in 2-methylpentane |
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Authors: | P.A.M. Van Den Bogaardt R.P.H. Rettschnick J.D.W. Van Voorst |
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Affiliation: | Laboratory for Physical Chemistry, University of Amsterdam, Amsterdam, The Netherlands |
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Abstract: | Two anomalous emission bands in the fluorescence spectrum of 3,4-benzpyrene, dissolved in 2-methylpentane, have been studied as a function of temperature. These emissions originate from the second excited singlet state S2, and from a vibrationally excited S1 (S*1) respectively. From the temperature dependence of the relative yield and the decay time of the S*1 emission it can be concluded that the vibrational relaxation of this state is hampered. The rate constant for this relaxation process is smaller that 4 > 62;x 107 sec?1. |
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