Synthesis of 4-Phenylazo Phenol from Anthocyanins of Delonix regia and Hibiscus sabdariffa Flowers
Oaikhena Z. Esezobor *
Department of Chemistry, University of Agriculture, Makurdi, Nigeria
Bassey A. Maikasuwa
Department of Chemistry, University of Agriculture, Makurdi, Nigeria
Terrumun A. Tor-Anyiin
Department of Chemistry, University of Agriculture, Makurdi, Nigeria
John O. Igoli
Department of Chemistry, University of Agriculture, Makurdi, Nigeria
*Author to whom correspondence should be addressed.
Abstract
Anthocyanins extracted from flowers of Delonix regia and Hibiscus sabdariffa were coupled with diazotised aniline. Spectroscopic analysis revealed the resulting product to be 4-phenylazo phenol. This study provides a viable use for anthocyanins as an alternative source of phenol used in the synthesis of this dye.
Keywords: 4-phenylazo phenol, aniline, anthocyanins, Delonix regia, Hibiscus sabdariffa