Styryl Dyes for Synthetic‐polymer Fibres.

Abstract

The synthesis of a series of dyes derived from reaction of 2‐methyl‐4‐(N‐ethyl‐N‐hydroxyethyl)amino, lidicyano‐styrene with acid chlorides, chloroformates, isocyanates and isothiocyanates is described. Data relevant to dye characterization by electron‐impact induced fragmentation is reported. Dyeing and fastness properties of the dyes on cellulose secondary acetate, cellulose triacetate, nylon 6.6 and polyester fibres are discussed in terms of dye structure. Comparison is made between some related dyes derived from 2‐methyl‐4‐(N‐ethyl‐N‐β‐aminoethyljamino‐β,βdicyanostyrene.

Synthesis and investigation of antimicrobial activity and spectrophotometric and dyeing properties of some novel azo disperse dyes based on naphthalimides

“…The highest value of molar extinction coefficient for dye 3 can be attributed to the electron donating group of ‐OH in the coupling component at para position in relation to the azo linkage . It is clear that the extinction coefficient can increase by introducing strong electron donating groups on couplers and strong electron acceptor groups on diazo components . Comparing the λ max values of the dyes in azo form shows that they follow the order of dye 1 > dye 2 dye 4 > dye 3 .…”

“…The highest value of molar 2,4 It is clear that the extinction coefficient can increase by introducing strong electron donating groups on couplers and strong electron acceptor groups on diazo components. 22,23 Comparing the k max values of the dyes in azo form shows that they follow the order of dye 1 > dye 2 dye 4 > dye 3. The properties of the dye's chemical structure depend on the nature of solvents and interactions between them and the dye.…”