文摘
The objective of the current study was to introduce the quinazolinone molecule into a conventional reactive dye system. On this basis ten novel quinazolinone-based monochloro-s-triazine reactive dyes (7a–j) were rapidly and efficiently synthesized by coupling route of diazotized 3-{4′-[4′′-amino-2′′,5′′-dichlorobenzyl]-2′, 5′-dichlorophenyl}-6-bromo-2-phenylquinazolin-4(3H)-one (3) with a variety of m-nitro anilino cyanurated coupling components (6a–j). Their characterization was done using elemental analysis, UV–Vis, IR, 1H NMR and 13C NMR spectroscopy. The solvatochromism was evaluated with respect to spectroscopic properties in organic solvents, viz., DMSO, DMF, methanol, acetic acid and chloroform. A detailed study of pharmacological screening (in vitro), solvatochromic effect, fastness properties, colorimetric data (L*, a*, b*, c*, H*, K/S) and thermogravimetric analysis was also investigated. These dyes showed generally moderate to very good light fastness and good to excellent washing and rubbing fastness properties and also showed good antimicrobial activity.