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The investigation has been made in the synthesis of azo hybrid rylene dyes. The hybridization of perylene bis-diimide with phenolic azo-dyes was carried out by the nucleophilic substitution (SNAr) reaction of tetrachloroperylene-3,4,9,10-bisdiimide 3 with phenolic azo-dyes 4a–g in basic medium. The hybrid dyes exhibited two absorption maxima λmax in the range 300–350, 426–438nm in ethanol due to presence...
Five phenolic azo-dyes (3a–e) were synthesized by diazo coupling of the suitably substituted anilines (1a–e) with phenol at low temperature in alkaline medium. The resulting dyes have low solubility in aqueous medium due to lack of carboxylic or sulfonic solubilizing functionalities. The hybridization of perylene dianhydride with phenolic azo-dyes was achieved by the nucleophilic aromatic substitution...
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