Controlled microstructures of amphiphilic cationic azobenzene-montmorillonite intercalation compounds

Makoto Ogawa, Ayako Ishikawa

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

The intercalation of two amphiphilic cationic azobenzene derivatives into the interlayer space of montmorillonite has been conducted by the ion exchange reactions between sodium montmorillonite and p-(ω-trimethylammoniopentyloxy)-p′-(dodecyloxy)azobenzene bromide or p-(ω-trimethylammoniodecyloxy)-p′-(octyloxy)azobenzene bromide. X-Ray diffraction and elemental analysis results indicated that the dye cations were intercalated into the interlayer space of montmorillonite. The spectral properties as well as the X-ray diffraction results have revealed that the adsorbed azo dye cations form so-called J-like aggregates with mono- and bi-layers in the interlayer space of montmorillonite. The orientation of the chromophore was controlled by host-guest and guest-guest interactions. The intercalated azo dyes exhibit reversible trans-cis photoisomerization by UV and visible light irradiation.

Original languageEnglish
Pages (from-to)463-467
Number of pages5
JournalJournal of Materials Chemistry
Volume8
Issue number2
Publication statusPublished - 1998 Feb

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

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