Synthesis of yellow pyridonylazo colorants and their application in dye–pigment hybrid colour filters for liquid crystal display

Abstract

Nine yellow azo dyes were designed and synthesised by using different diazo components and pyridonyl coupling components for application in dye-pigment hybrid colour filters for liquid crystal displays. The synthesised dyes were characterised by proton nuclear magnetic resonance and elemental analysis. The thermal stability was examined by thermogravimetric analysis, and solubility was estimated in industrial solvents such as N-methyl-2-pyrrolidone and propylene glycol methyl ether acetate. The dyes, which exhibited suitable physical properties for use in a dye-pigment hybrid colour filter, were fabricated into colour filters, and their optical properties were measured. Coloration Technology Society of Dyers and Colourists 158

Aryl and heteroaryl azo dyes derived from 6, 8‐dichloro‐4‐hydroxyquinolin‐2 (1H)‐one: synthesis, characterisation, solvatochromism and spectroscopic properties

“…All of the 3‐aryl‐ and 3‐hetaryl‐azo‐ 4‐hydroxyquinolin‐2(1 H )‐one dyes were synthesised from the reaction of the appropriate diazonium salt with 6, 8‐dichloro‐4‐hydroxyquinolin‐2(1 H )‐one 4 using classical reported procedures for the synthesis of azo compounds . The crude products were purified by recrystallisation with DMF‐H 2 O and then analysed.…”

“…All of the 3-aryl-and 3-hetaryl-azo-4-hydroxyquinolin-2(1H)-one dyes were synthesised from the reaction of the appropriate diazonium salt with 6, 8-dichloro-4-hydroxyquinolin-2(1H)-one 4 using classical reported procedures for the synthesis of azo compounds. [27][28][29][30] The crude products were purified by recrystallisation with DMF-H 2 O and then analysed. The structure of the dyes was confirmed by UV-vis, FT-IR and 1 H NMR spectroscopic techniques and elemental analysis.…”

Synthesis of Nitroso-Based Bis-Azo Dyes And Their Dyeing Properties For Polyethylene Terephthalate And Polyamide

“…The reduction-cleared samples were rinsed with water and later neutralized in 1.0 gL -1 acetic acid at 40°C for 5 min. Finally, the samples were rinsed in tap water and air-dried [8].…”

The application of disperse dyes derived from 4-bromoaniline and 3-chloroaniline on to polyester fabric

“…Organic compounds of this type can be used as chromophoric systems for many kinds of applications such as in the dyeing of polyesters, polyamides and acrylics. In addition, they could be used as organic photoconductors, in liquid crystal displays, photosensitizers and other non-textile applications [11,14,15].…”