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Russian Chemical Bulletin

, Volume 44, Issue 7, pp 1232–1236 | Cite as

Structuring of tricarbocyanine dye molecules in Langmuir-Blodgett films

  • V. A. Tkachev
  • A. V. Tolmachev
  • L. V. Chernigov
  • Yu. L. Slominsky
Physical Chemistry

Abstract

The problems of formation of stable Langmuir monolayers containingN-sulfopropyl substituted thiatricarbocyanine dyes are considered: the effects of the composition of the mixture applied on the surface of an aqueous subphase and of the extent of compression of the monolayer on processes of ordering of molecular structure. Dyes are introduced into complex monolayers at the water-air interface and then are transferred on solid substrates as multilayered Langmuir-Blodgett (LB) films. For the first time the formation of J-aggregates has been observed for two tricarbocyanine dyes. The structure of J-aggregates depends on the composition of the mixture and the value of the constant pressure at which the transfer occurs. LB films of J-aggregated dyes are optically anisotropic, which is related to the fact that they are formed in the monolayer on the surface and there is no interlayer aggregation during the transfer to substrates. Heterodimers are formed in complex monolayers containing oppositely charged ions of dyes.

Key words

Langmuir monolayer Langmuir-Blodgett film tricarbocyanine dye heterodimer J-aggregate absorption spectra 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • V. A. Tkachev
    • 1
  • A. V. Tolmachev
    • 1
  • L. V. Chernigov
    • 1
  • Yu. L. Slominsky
    • 2
  1. 1.Institute for Single CrystalsNational Academy of Sciences of UkraineKharkovUkraine
  2. 2.Institute of Organic ChemistryNational Academy of Sciences of UkraineKievUkraine

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