Abstract
9-Anthroyl derivatives of some aromatic amines exhibit unusual fluorescence characteristics. In solvents of low and medium polarity (hexane, chloroform, DMF, and tert-butanol), their emission maxima are shifted to longer wavelengths as compared to the spectra recorded in polar solvents (ethanol and methanol); the red shift is accompanied by an increase in the fluorescence quantum yield. Possible reasons of such an anomalous spectral shift are discussed.
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