Nanohybrids of edible dyes intercalated in ZnAl layered double hydroxides

Jin Ho Choy, Yun Kyung Kim, You Hwan Son, Young Bin Choy, Jae Min Oh, Hyun Jung, Seong Ju Hwang

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17 Citations (Scopus)


Edible dyes such as Allura® Red AC (C18H14N2O8S22-), Sunset Yellow FCF (C16H10N2O7S22-), and Brilliant Blue FCF (C37H34N2O9S32-) were successfully intercalated into the gallery spaces of ZnAl layered double hydroxides (LDHs). Those organic-inorganic nanohybrids were synthesized by co-precipitating the aqueous solution of zinc nitrate and aluminum nitrate simultaneously in the presence of anionic dyes. From the X-ray diffraction and infrared spectroscopic analyses, we found that the dye molecules could be intercalated into hydroxide layers without any changes in their chemical and structural properties. The basal spacings were determined to be 24.0, 20.3, and 24.7 Å for Allura® Red AC, Sunset Yellow FCF, and Brilliant Blue FCF intercalated LDHs, respectively. According to the solid UV-vis spectroscopic analyses, the absorbance intensity of dye-intercalated LDHs was clearly enhanced with the band narrowing compared to those of the corresponding dye salts due to the charge transfer between the host lattice and spatially confined dye molecules.

Original languageEnglish
Pages (from-to)1547-1551
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Issue number5-6
Publication statusPublished - 2008 May

Bibliographical note

Funding Information:
This work was financially supported by the SRC/ERC program of MOST/KOSEF through the Center for Intelligent Nano-Bio Materials (Grant: R11-2005-008-00000-0) at Ewha Womans University (Grant: R11-2005-008-01001-0).

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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