Synthesis and application of new mordent and disperse azo dyes based on 2,4-dihydroxybenzophenone

Abstract

Novel mordent and disperse azo dyes were prepared by the coupling of various diazo solutions of aromatic amines with 2,4-dihydroxybenzophenone. The resultant dyes were characterized by elemental analyses as well as IR and NMR spectral studies. The UV-visible spectral data have also been discussed in terms of structural property relationship. The dyeing assessment of all the dyes was evaluated on wool and polyester textile fibers. The dyeing of chrome treated (i.e., chrome mordented) wool and polyesters was also monitored. The results show that a better hue was obtained on mordented fibers. The results of the anti-bacterial properties of the chrome dyes revealed that the toxicity of these dyes against bacteria is fairly good. .

Synthesis, electrochemical, spectrophotometric and potentiometric studies of two azo-compounds derived from 4-amino-2-methylquinoline in ethanolic-aqueous buffered solutions

“…This means that each of the examined compounds 2 and 3 has one dissociable proton from the enolized hydrogen ion of the hydroxyl group (Table 4). This indicates that the acid-base equilibrium based on the molecular form HL is in complete accordance with the following equilibrium: (4) As shown in Table 4, compound (2) has a lower acidic character (pK 1 H = 8.75) than compound (3) (pK 1 H = 7.5). This is quite reasonable because the presence of NH 2 group enhances the electron density by its high electrondonating mesomeric and inductive effects, respectively; thereby stronger O-H bond is formed.…”

“…Azo-dyes are widely used in many practical applications such as photochromic materials, colorants, non-linear optics, sensors and indicators. [1][2][3][4][5][6][7][8][9][10][11][12] The synthesis and spectral properties of several azo-dyes as well as of their transition metal complexes have been reported in the literature. [13][14][15][16][17] The electrochemical behavior and electrode reaction pathways of numerous azo-dyes in various supporting electrolytes were studied and discussed.…”

Synthesis, characterization and dyeing behavior of heterocyclic acid dyes and mordent acid dyes on wool and silk fabrics

“…One such auxochromic (-OH) and chromophoric (C=O) groups containing compound, i.e., 2-butyl-3-(4-hydroxybenzoyl)benzofuran, has shown wide applications as a polymer additive. Hence, in continuation of earlier work, [17][18][19][20][21] the present communication comprises the synthesis, characterization and dyeing assessment of novel heterocyclic acid dyes and mordent acid dyes based on 2-butyl-3-(4-hydroxybenzoyl)benzofuran. [10][11][12][13] The formation of heterocyclic acid dyes and mordant acid dyes based on this compound has not been developed, except in a few patents.…”

Assessment of Dyeing Properties of Novel Bisazo‐Bisazomethine Disperse Dyes on Polyester Fabric

“…diazotization of aromatic amines followed by their coupling with Schiff base. Diazotization was carried out by the reported method [16][17][18] . Accordingly, aniline and other substituted amines such as p-toludine, 2-nitroaniline, 3-nitroaniline, 4-nitroaniline, 3-chloroaniline, 4-chloroanilne, 4-bromoaniline, 3-aminophenol and 4-aminophenol were diazotized by following the given procedure:…”