Abstract

The phosphorescence spectrum of phenazine in ethanol at 77K is strongly excitation dependent. In the spectra shown in fig. 1b three components may be recognized: 1. A very weak component A may be observed at about 15500cm^-1, i.e. at the blue edge of the phosphorescence spectrum. Its excitation spectrum is significantly different from that observed at 15370cm^-1, i.e. that of the main component (see fig. 1a). 2. The main component B with its 0-0 band at 15370cm^-1. 3. A weaker component C whose 0-0 phosphorescence band shifts to the red (down to about 15100cm^-1) upon excitation into the red edge of the absorption spectrum.

© 1984 Optical Society of America