Abstract
A new nano silicagel supported by thionyl chloride as a solid acid was synthesized and used as a increasing the production yield of dye to affect the efficient diazotization of arylamines. The diazonium salts thus obtained were coupled, using standard experimental procedures, to anilines and naphthols to afford the requisite azo dyes in good yield. The diazotization and subsequent azo-coupling generated the related azo dyes at low temperature in short reaction times with a simple experimental procedure.
Highlights
Azo compounds are considered to be the most widely used class of industrial synthesized organic dyes due to their versatile applications in various fields, such as dyeing textile fiber, biological-pharmacological activities and advanced application in organic synthesis[1,2,3,4,5,6]
The usual azo dyes synthesis methods require some difficult conditions like low temperature, high pressure and the use of dense liquid acids[7,8,9]
The resulting compound was placed in vaccum desicator for 24 h to obtain the white powder of nano silicagel supported by thionyl chloride
Summary
Azo compounds are considered to be the most widely used class of industrial synthesized organic dyes due to their versatile applications in various fields, such as dyeing textile fiber, biological-pharmacological activities and advanced application in organic synthesis[1,2,3,4,5,6]. The usual azo dyes synthesis methods require some difficult conditions like low temperature, high pressure and the use of dense liquid acids[7,8,9]. The use of nano solid acid in azo dyes synthesis increases the production yield of dye and reduces the period of time that is required for dye synthesis.
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