Characterization of π-conjugated monolayers of oligo(phenylenevinylene) derivatives by absorption spectroscopy and fluorescence microscopy

Atsushi Watakabe, Toyoki Kunitake

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Monolayer formation of oligo(phenylenevinylene) derivatives, methyl 4-(2-(4-(2-phenylethenyl)phenyl)ethenyl)benzoate (I) and N,N-dimethyl-4-(2-(4-(2-phenylethenyl)phenyl)ethenyl)benzamide (II), was demonstrated and confirmed by surface pressure-area isotherms and fluorescence microscopy. Stable monolayers were formed in the case of 4-(2-(4-(2-(4-methoxyphenyl)ethenyl)phenyl)ethenyl)benzyltrimethylammonium bromide (III) only through formation of a polyion complex at the interface. Fluorescence microscopy revealed island formation even at large molecular areas in all cases. Absorption spectra of monolayers (I) and (II) were much blue-shifted relative to those in solution, suggesting parallel stacking of the π-conjugated molecules. Mixed monolayers of (I) with stearic acid or dioctadecyldimethylammonium bromide were phase-separated, as indicated by absorption spectra. However, the domain size of the latter mixture was smaller than the resolution of fluorescence microscopy.

Original languageEnglish
Pages (from-to)90-98
Number of pages9
JournalJournal of Colloid And Interface Science
Volume145
Issue number1
DOIs
Publication statusPublished - Jan 1 1991
Externally publishedYes

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Fluorescence microscopy
Absorption spectroscopy
Monolayers
Derivatives
Absorption spectra
Stearic acid
Benzoates
Bromides
Isotherms
Molecules

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

Characterization of π-conjugated monolayers of oligo(phenylenevinylene) derivatives by absorption spectroscopy and fluorescence microscopy. / Watakabe, Atsushi; Kunitake, Toyoki.

In: Journal of Colloid And Interface Science, Vol. 145, No. 1, 01.01.1991, p. 90-98.

Research output: Contribution to journalArticle

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