Synthesis and Electronic Spectra of some 4–Aminoazobenzenes

The synthesis of a range of monoazo disperse dyes prepared from monosubstituted anilines as the diazo components is reported The absorption maxima of the dyes are recorded, and shifts resulting from the effect of different substituents in both the diazo component and the coupling component are correlated with the nature of the substituent. The use of monosubstituted aniline; as diazo components, coupled to different TV–substituted anilines, can result in dyes with λDmax differing by about 100 nm.