Dynamically controllable emission of polymer nanofibers: Electrofluorescence chromism and polarized emission of polycarbazole derivatives

Kohsuke Kawabata, Hiromasa Goto

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Electrochemical polymerization of a series of N-alkyl-2,7-di(2-thienyl) carbazoles in acetonitrile was performed to obtain conjugated polymers with fluorescence. Scanning electron and atomic force microscopies revealed that the surface morphology of the polymer films significantly depends on the alkyl chain lengths of the polymers. Particularly, a homopolymer bearing hexyl groups and copolymers with an average alkyl chain length of six carbon atoms show nanofiber morphology. The polymer nanofibers were stacked on a substrate electrode. The fluorescence of the polymer nanofiber film was tunable with application of voltage, with good repeatability. The X-ray diffraction pattern of the fibers showed the structural order. The polymer nanofibers thus prepared showed an electrochemically driven change in polarized photoluminescence.

Original languageEnglish
Pages (from-to)15065-15072
Number of pages8
JournalChemistry - A European Journal
Volume18
Issue number47
DOIs
Publication statusPublished - 2012 Nov 19
Externally publishedYes

Keywords

  • electrochemistry
  • electrochromism
  • luminescence
  • nanostructures
  • polymerization

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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