Characterization, application and microbial study of imidazole base acid anthraquinone dyes

A new series of Imidazole based anthraquinone acid dyes were synthesized by condensation of bromanie acid with imidazole to produce 1-amino-4-(imidazolyl)anthraquinone-2-sulfonic acid was diazotized and coupled with various naphthalene based acid coupling components to produce the novel series of acid anthraquinone dyes. All the synthesized dyes were characterized by elemental analysis spectral studies and the dyeing performance on wool, silk and nylon fibres has been assessed. All the synthesized dyes give good to very good light fastness on each fibre. The percentage dye-bath exhaustion on different fibres was good and aceptable. The dyed fibres showed moderate to very good fastness to light, washing and rubbing. All the synthesized dyes have been screened for their antimicrobial activity.