Abstract
The photofading of 4'-methoxy-2'-nitro-N,N-diethylaminoazobenzene is examined on polyester film and in ethyl acetate solvent. On the basis of the products, it is shown that the fading occurs via N-dealkylation and photoreduction pathways. Luminescence, flash-photolysis and derivative spectroscopy studies of some disperse azo dyes derived from 4-N,N-diethylaminoazobenzene support the hypothesis of the formation of a complex between the diethylamino group and the ester function in the ground state.
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