Abstract
The fluorescence emission spectra and quantum yields of thirteen 1-amino-2-amino- and 1,4-diamino-anthraquinones in a variety of solvents have been determined. The quantum yield values for the 1-amino derivatives are decreased on N-alkylation and also by the N-substitution of acyl or aryl groups. Both emission wavelength maxima and quantum yields of the 2-substituted derivatives are markedly sensitive to solvent polarity. These observations are discussed in relation to the light fastness of the aminoanthraquinones on polyester fabric.
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