Characterization and properties of new color-tunable hybrid pigments based on layered double hydroxides (LDH) and 1,2-dihydroxyanthraquinone dye

Abstract In this paper a novel, simple method for synthesis of lake pigments based on 1,2-dihydroxyanthraquinone dye and LDH carbonates was proposed. LDHs were modified with 1,2-dihydroxyanthraquinone, transforming the soluble dye into a new kind of hybrid lake. In result, the solvent resistance and photostability of the chromophore were improved, which may be attributed to strong dye–LDH interactions. TOF-SIMS technique was used for the first time to confirm the role of C 14 H 7 O 4 Mg + and C 14 H 6 O 5 Al − ions in the formation of the hybrids. Alizarin lakes have been recognized as a new class of colorants which demonstrated good color characteristics and chemical stability.