Pyrazole-vaniline Schiff base disperse azo dyes for UV protective clothing: synthesis, characterization, comparative study of UPF, dyeing properties and potent antimicrobial activity

Abstract

From 5-amino pyrazole, azo disperse pyrazole dyes containing o-vanillin have been synthesized and characterized using elemental analyses and Spectroscopic techniques. All synthesized dyes have been effectively used on polyester fabrics as disperse dyes, and the performances of dyeing have been studied and evaluated. The dyes have good depth, brightness and good leveling properties. The fastness properties of the dyed samples have been thoroughly examined and assessed with regard to washing, perspiration, rubbing, and light fastness. Color representation, colorimetric data (L*, a*, b, C*, h, and K/S), and other multifunctional features have also been studied. The degree of exhaustion and fixation were attained. Additionally, the dyed fabrics were put through an ultraviolet protection factor test, with the findings demonstrating that these dyes provided superior UV protection. The synthetic dyes were tested in- vitro against different bacteria and fungi, all of the dyes shown a significant activity compared with the standard drug. Graphical abstract

Azobenzene-Containing Schiff-Bases—Syntheses and Dyes Applications

“…For example, an azobenzene Schiff base containing two reactive groups was synthesized (PRO1, Figure 8) and the functional cellulose fabrics had UV-protection properties with (UPF = 31.7) [96]. When applied on polyester clothing, pyrazole-vanillin Schiff base disperse azo-dyed fabrics tested in an ultraviolet-protectionfactor test provided superior UV protection [97].…”

“…Colorants 2024, 3, FOR PEER REVIEW 15 pyrazole-vanillin Schiff base disperse azo-dyed fabrics tested in an ultraviolet-protectionfactor test provided superior UV protection [97]. Anticorrosive behavior of Azo-Schiff bases is also well known.…”