Characterization of hemicyanine aggregates in air-water monolayers

Robert A. Hall, Peter J. Thistlethwaite, Franz Grieser, Nobuo Kimizuka, Toyoki Kunitake

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Absorption spectra of a docosyl derivative of the hemicyanine chromophore were measured at the air-water interface as a function of surface concentration. At low compression, a broad band is observed corresponding to the monomer species. With increasing surface pressure two new bands grow in concurrently at the expense of the monomer band. Principal factor analysis of the spectra indicates that the two aggregate bands are produced by a single aggregate species. In terms of exciton theory, this corresponds to the aggregate geometry having two molecules per unit cell. The sensitivity of the aggregate structure to the local environment is shown by the shift in position of the absorption bands for a mixed hemicyanine-cationic diluent monolayer. The polyion complexed hemicyanine monolayer exists only as the monomer at all surface concentrations, in contrast to the monomer-aggregate coexistence observed on a pure water subphase.

Original languageEnglish
Pages (from-to)11974-11978
Number of pages5
JournalJournal of Physical Chemistry
Volume97
Issue number46
DOIs
Publication statusPublished - Jan 1 1993

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Monolayers
monomers
Monomers
Water
air
Air
water
Absorption spectra
absorption spectra
factor analysis
diluents
Factor analysis
Chromophores
Excitons
chromophores
excitons
tetramethylene hemicyanine
broadband
Derivatives
Molecules

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Hall, R. A., Thistlethwaite, P. J., Grieser, F., Kimizuka, N., & Kunitake, T. (1993). Characterization of hemicyanine aggregates in air-water monolayers. Journal of Physical Chemistry, 97(46), 11974-11978. https://doi.org/10.1021/j100148a022

Characterization of hemicyanine aggregates in air-water monolayers. / Hall, Robert A.; Thistlethwaite, Peter J.; Grieser, Franz; Kimizuka, Nobuo; Kunitake, Toyoki.

In: Journal of Physical Chemistry, Vol. 97, No. 46, 01.01.1993, p. 11974-11978.

Research output: Contribution to journalArticle

Hall, RA, Thistlethwaite, PJ, Grieser, F, Kimizuka, N & Kunitake, T 1993, 'Characterization of hemicyanine aggregates in air-water monolayers', Journal of Physical Chemistry, vol. 97, no. 46, pp. 11974-11978. https://doi.org/10.1021/j100148a022
Hall, Robert A. ; Thistlethwaite, Peter J. ; Grieser, Franz ; Kimizuka, Nobuo ; Kunitake, Toyoki. / Characterization of hemicyanine aggregates in air-water monolayers. In: Journal of Physical Chemistry. 1993 ; Vol. 97, No. 46. pp. 11974-11978.
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