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

In this paper a novel, simple method for synthesis of lake pigments based on 1,2-dihydroxyanthra-quinone 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 C14H7O4Mg+ and C14H6O5Al- 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. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.