Intercalation of a cationic azobenzene into montmorillonite

Makoto Ogawa*, Takuma Ishii, Nobuyoshi Miyamoto, Kazuyuki Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


The intercalation of a cationic azobenzene derivative into the interlayer space of montmorillonite has been achieved by ion exchange between sodium-montmorillonite and p-(ω-dimethyl-hydroxyethylammonioethoxy) -azobenzene bromide. X-ray diffractometry and elemental analysis indicated that the dye cations were intercalated. The microstructures of the montmorillonite-dye intercalates were controlled by the amount of dye loaded as evidenced by the variation in basal spacings and visible absorption spectra of the materials. The intercalated azo dyes exhibit reversible trans-to-cis photoisomerization under UV and visible light irradiation.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalApplied Clay Science
Issue number4
Publication statusPublished - 2003 Feb
Externally publishedYes


  • Aggregates
  • Azobenzene
  • Intercalation
  • Montmorillonite
  • Nano-composite
  • Photoisomerization

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology


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