Abstract
In this work, three novel vinylsulfone based azo reactive dyes were successfully synthesized by successive condensations, diazotization and coupling reaction steps using reactive acids i.e. H-acid, J-acid and gamma-acid respectively. Synthesized dyes were applied with 3% dye (stock) solutions on the mill scoured; bleached and desized cotton fabric by exhaust method of dyeing. UV-visible absorption spectroscopic properties of the azo dyes were recorded among wavelength range (400-800 nm), prepared in double distilled water as lambda(max). The prepared dyes were purified with physico-chemical method and characterized by means of different analytical techniques i.e. FT-IR and ESI-MS-MS to evaluate their chemical structures and molecular mass.