Dyes and pigments

Natural anthraquinonoid colorants as platform chemicals in the synthesis of sustainable disperse dyes for polyesters

I Drivas, RS Blackburn, CM Rayner

Index: Drivas, Ioannis; Blackburn, Richard S.; Rayner, Christopher M. Dyes and Pigments, 2011 , vol. 88, # 1 p. 7 - 17

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Citation Number: 22

Abstract

Natural anthraquinonoid dyes (alizarin and purpurin) were used as platform chemicals to synthesise sustainable alternatives to existing synthetic dyes by alkylation of hydroxy groups in the 1-and 2-positions. In comparison with the parent compounds, the derivatised dyes were insensitive to pH change, insoluble in alkali and the λmax for the mono-alkylated derivatives was unchanged and that of the bis-alkylated derivatives was reduced by 53– ...