Novel reactive dyes with intramolecular color matching combination containing different chromophores

Five novel reactive dyes by intramolecular color matching combination based on azo and anthraquinone multiple chromophores were designed and synthesized. They were obtained by using 1-amino-8-naphthol-3,6-disulfonicacid (H-acid) or 2-amino-5-naphthol-7-sulfonic Acid (J-acid) as the coupling component, 4-(ethylsulfurate sulfonyl) aniline as the diazo component and 1-amino-2-sulfonic acid-4-(3-amino-2,4,6-trimethyl-5-sulfonic acid phenylamine) anthraquinone sodium salt derivatives as the anthraquinone chromophore. The chemical structures of the synthesized dyes were characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H NMR) and ultraviolet-visible spectra (UV-Vis). The dyes containing both azo and anthraquinone chromophores showed novel and beautiful color, including taupe, violet, brown, rosy and claret-red. The synthesized dyes showed good dyeing performances and fastness on cotton fabric. Because of the intramolecular color matching, the new reactive dyes have significant advantage in the colors and the reproducibility. The problem of low dyeing compatibility may be resolved. This work has important significance for the synthesis and applications of new dyes by intramolecular color matching.