Abstract
In this paper we show that there exist rather simple aromatic systems which show no line narrowing in their fluorescence at 2 K, when excited with narrow bandwidth. However, large inhomogeneous line broadening is detected via a shift of the fluorescence bands with excitation energy. This inhomogenous broadening is attributed to a quasi-continuous site splitting, which is present up to about 240 K. The influence of high excess energy on the inhomogenous broadening is dis-cussed.


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