An environmentally friendly approach to the synthesis of azo dyes based on 2-naphthol using kaolin-SO3H nanoparticles

PDF HTML
  • Abdolhamid Bamoniri*1,
  • Bi Bi Fatemeh Mirjalili2,
  • Nahid Yaghmaeiyan-Mahabadi1,
  1. Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
  2. Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran

Published in Issue 2024-02-03

How to Cite

Bamoniri, A., Mirjalili, B. B. F., & Yaghmaeiyan-Mahabadi, N. (2024). An environmentally friendly approach to the synthesis of azo dyes based on 2-naphthol using kaolin-SO3H nanoparticles. Iranian Journal of Catalysis, 8(2). https://oiccpress.com/ijc/article/view/3996

PDF views: 124

HTML views: 2

Abstract

Kaolin-SO3H nanoparticles were prepared via reaction of kaolin and chlorosulfonic acid and characterized by FT-IR, XRD, FESEM, TEM, XRF, EDS, BET and TGA. The activity of this green catalyst was probed by the synthesis of aryl diazonium salts as the starting reactant and then, their diazo coupling with  2-naphthol to form azo dyes in a solvent-free medium at room temperature. The work-up of the reaction was easy, and the catalyst was removed from the products by simple filtration. The reaction proceeded in a short time, easy purification technique, high yields, and was environmentally friendly furthering approaches to green chemistry. The products were characterized by FT-IR and NMR spectroscopy.

Keywords

  • 2-Naphthol,
  • Diazo coupling. Solvent-free,
  • Diazonium salt.,
  • Kaolin-SO3H,
  • nanoparticles
PDF HTML