Arrangements of interlayer quaternary ammonium ions in a layered silicate, octosilicate

Makoto Ogawa*, Daisuke Iwata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


The ion exchange of octosilicate with a series of quaternary organoammonium ions was examined. The ion exchange proceeds almost quantitatively to replace the interlayer sodium ions. When n-alkyltrimethylammonium ions were exchanged with sodium ions, the basal spacings increased with the alkyl chain length, showing the formation of paraffin type surfactant aggregates in the interlayer space. When the organic cations with complex molecular geometry (dimethyldioctadecylammonium, N-(α-trimethylammonioacetyl)-didodecyl-l- glutamate, and O,O',O"-tridodecanoyl-N-(ω-trimethyl ammoniodecanoyl)-tris(hydroxymethyl)aminomethane) were used, the basal spacings changed as a function of the molecular weight of the intercalated guest species. It is speculated that the molecular geometries of the intercalated species are flexible to form densely packed nanostructures in the interlayer space.

Original languageEnglish
Pages (from-to)2068-2072
Number of pages5
JournalCrystal Growth and Design
Issue number5
Publication statusPublished - 2010 May 5

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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