Classifications, properties, recent synthesis and applications of azo dyes
Said Benkhaya,
Souad M'rabet,
Ahmed El Harfi
Affiliations
Said Benkhaya
Laboratory Agro-Resources, Polymers and Process Engineering (LARPOGP)/Organic and Polymer Chemistry, Faculty of Sciences, University Ibn Tofail, Morocco; Corresponding author.
Souad M'rabet
Laboratory of Geosciences and Environment, Team Development Geo Resource and Renovation Territories, Faculty of Science, University Ibn Tofail, Kenitra, Morocco
Ahmed El Harfi
Laboratory Agro-Resources, Polymers and Process Engineering (LARPOGP)/Organic and Polymer Chemistry, Faculty of Sciences, University Ibn Tofail, Morocco
In this work, we have presented a very detailed review of the different classification of azo dyes as a function of the number of azo groups and the appropriate functional groups. Then we pointed out some chemical properties of these dyes such as reactivity, isomerization and tautomerism and listed. In the following, we have summarized some recent syntheses of azo dyes and the mechanism of azo dye/polymer conjugation. Finally, we indicate the principle of Gewald's reaction and its application to the synthesis of new azo dyes.
