Azo dyes are prepared in a two step reaction the first being the synthesis of an aromatic diazonium ion from an aniline derivative. The next step is coupling
New azo dye was synthesized by reaction dizonium salt of sulfanilic acid with antimelaria drug (chloro quin diphosphate).This product was characterized by
Dyes are used in almost every commercial product such as food clothing
https://www.cell.com/heliyon/pdf/S2405-8440(20)30116-X.pdf
Abstract. In present work two ligands
(1–5) Synthesis of azo pyrazole derivatives. 27. (3–1) synthesis of azo dyes ligands (L1 and L2). 49. (3–2) synthesis of azo dyes ligands (L3 and L4). 50. (3-3)
stability constant of the complexes have also been studied. Keywords: Azo-dyes azo-aromatic ligand
The azo compounds [N1-N3] was synthesis by reaction of two organic compounds a diazonium salt (4-amino-2-hydroxy-benzoic acid) reacts as electrophile with an
Aromatic diazonium salts are important building blocks in the preparation of azo dyes which were synthesized via diazotization of aryl amines using nitrous acid
Azo dyes are the most important group of synthetic colorants. They are generally considered as xenobiotic compounds that are very recalcitrant against
How is azo dye synthesized?
To complete the synthesis of an azo dye, the diazonium salt reacts as an electrophile with an electron-rich coupling component, like a phenol or an aniline. This is done through an electrophilic aromatic substitution mechanism.
Which heterocyclic scaffolds are used in the synthesis of azo dye derivatives?
Thus, the synthesis of azo dye derivatives incorporating heterocyclic scaffolds such as imidazole, pyrazole, thiazole, oxazolone, thiophene, pyrrole, benzothiazole and quinoline moieties and their pharmacological applications are discussed briefly. 1. Introduction
What are the properties of heterocyclic azo dyes?
Nowadays, azo dyes incorporating heterocyclic moieties exhibit enhanced coloring properties, tinctorial strength, thermal stability, and more positive solvatochromic behavior than the dyes derived from a simple aromatic amine. 5–7
What enzymes are used to degrade azo dyes?
Only reliable azo-reducing enzymes have been discovered to degrade the dyes. The enzymatic catalytic action is adequate and preferred as chemical catalysts because of higher reaction rates, milder reaction action and greater stereospecificity [11]. Microbial Bioremediation of Azo Dyes
The Synthesis of Azo Dyes