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

Iranian Journal of Catalysis

مقاله 2، دوره 8، شماره 2، شهریور 2018، صفحه 81-88   

نوع مقاله: Articles

نویسندگان

Abdolhamid Bamoniri^{* 1}؛ Bi Bi Fatemeh Mirjalili²؛ Nahid Yaghmaeiyan-Mahabadi¹

¹Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran.

²Department of Chemistry, College of Science, Yazd University, Yazd, I.R. Iran.

چکیده

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.

کلیدواژه‌ها

2-Naphthol؛ Kaolin-SO3H؛ Nanoparticles؛ Diazonium salt؛ Diazo coupling؛ Solvent-free

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