Abstract

Time-resolved fluorescence spectra were measured for pyrene and for the pyrene-N,N-dimethylaniline system in the range from 3 nsec to 150 nsec after the excitation by a nitrogen gas laser. By the aid of the spectra, we could follow the formation and decay processes of the pyrene excimer or the pyrene-N,N-dimethlaniline exciplex. The rate constants were determined for the exciplex formation and decay processes.

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