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Lifetimes of partial charge transfer exciplexes of 9-cyanophenanthrene and 9-cyanoanthracene |
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| Authors: | Elena Dolotova Denis Dogadkin Irina Soboleva Michael Kuzmin Oliver Nicolet and Eric Vauthey |
| Institution: | a Department of Chemistry, Moscow M.V. Lomonosov University, Leninskie Gory, MSU, Moscow 119992, Russia b Department of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, Geneva CH-1211, Switzerland |
| Abstract: | The fluorescence decays of several exciplexes with partial charge transfer have been investigated in solvents of various polarity. The measured lifetimes are found to be in reasonable agreement with the activation enthalpy and entropy of exciplex decay obtained earlier from the temperature dependence of the exciplex emission quantum yields. For exciplexes with 9-cyanophenanthrene substantial contribution of the higher local excited state into the exciplex electronic structure is found and borrowed intensity effect enhances the exciplex emission rate constants. |
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