Synthesis and properties of the water-soluble self-acid-doped polypyrrole: poly[4-(3-pyrrolyl)butanesulfonic acid]

En Chung Chang, Mu Yi Hua, Show An Chen*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

12 Scopus citations

Abstract

The water-soluble polypyrrole, poly[4-(3-pyrrolyl)butanesulfonic acid] (P3PyBSH), in which the β-position of pyrrole ring is substituted with n-butanesulfonic acid group, is synthesized by oxidation polymerization of 3PyBSNa followed with an ion-exchange of Na+ with H+. It can be cast into free-standing film from its aqueous solution and has a conductivity of 4.0×10-4 S/cm, higher than that of its sodium salt (5.5×10-6 S/cm) by about 2 orders. The increase in conductivity is attributed to the self-doping by the protons originally on the side chains as supported by the absence of the anion FeCl4- (which generates during the polymerization) and the presence of polaron and bipolaron characteristics in its UV-Vis and IR spectra.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalJournal of Polymer Research
Volume5
Issue number4
DOIs
StatePublished - 10 1998
Externally publishedYes

Keywords

  • Self-acid-doped polypyrrole
  • Water-soluble conjugated conducting polymer

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