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

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Characterization of π-conjugated monolayers of oligo(phenylenevinylene) derivatives by absorption spectroscopy and fluorescence microscopy'. Together they form a unique fingerprint.

  • Cite this