Adsorption and aggregation of a cationic cyanine dye on smectites

Makoto Ogawa*, Ryo Kawai, Kazuyuki Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


The adsorption and aggregate formation of a cationic cyanine dye, 1,1′-diethyl-2,2′-cyanine, on montmorillonite and saponite have been investigated for aqueous suspensions and cast films. In aqueous suspensions, the cyanine dye cations formed J-aggregates on montmorillonite, while they distribute molecularly on saponite. On the other hand, the dye formed J-aggregates on both montmorillonite and saponite in the cast films. Thus, the spectroscopic features of the cyanine dye reflected the difference between montmorillonite and saponite in organizing guest species. This difference suggests that the cyanine dye can be organized in a controlled manner by the selection of host materials. The J-aggregates formed on the layered silicates may be useful for the study of optical properties of the aggregates because of their stable and confined microstructure.

Original languageEnglish
Pages (from-to)16218-16221
Number of pages4
JournalJournal of physical chemistry
Issue number40
Publication statusPublished - 1996 Oct 3
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry


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