Novel Naphthalimide Based Azo Disperse Dyes for Dyeing of Polyester ‎Fabrics

A series of monoazo disperse dyes ‎based on naphthalimide was ‎synthesized using N-‎alkylcarboxylic acid-1,8-‎naphthalimide as diazo component ‎and N,N-diethylaniline derivatives ‎as a coupling components. 4-‎amino-N-ethanoic (propanoic) ‎acid-1,8-naphthalimide was ‎synthesized from 4-nitro-1,8-‎naphthalic anhydride by imidation ‎and subsequent reduction ‎reactions. These compounds were ‎diazotized and further coupled to ‎substituted N, N-diethylaniline to ‎produce dyes which give red to ‎violet hues on polyester fabrics. ‎The prepared dyes and their ‎corresponding intermediates were ‎characterized by elemental ‎analysis, DSC, FTIR, 1HNMR and ‎UV-Vis spectroscopic techniques. ‎The dyed polyester fabrics showed ‎moderate light fastnesses, very ‎good to excellent washing, rubbing ‎and sublimation fastnesses. ‎