Synthesis and properties of chemically coupled poly(thiophene)

M. Kobayashi, J. Chen, T. C. Chung, F. Moraes, A. J. Heeger, F. Wudl

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Abstract

We describe the synthesis and physical properties of poly(thiophene) with a molecular weight of approximately 4000 consisting of 46 - 47 thiophene rings (184 - 188 carbons along the backbone). The pristine polymer exhibits an ESR line similar to that of cis-(CH)x; the small number of unpaired spins is consistent with relatively high-quality material. The electrical conductivity can be increased by nearly ten orders of magnitude to values in excess of 10 Ω-1 cm-1 upon partial oxidation by AsF5. The magnitude and temperature dependence of the thermopower of the doped polymer (24 mol%) are consistent with metallic behavior. The decrease in conductivity as the temperature is lowered and the magnitude of π at room temperature apparently result from the macroscopic transport being limited by interparticle contacts.

Original languageEnglish (US)
Pages (from-to)77-86
Number of pages10
JournalSynthetic Metals
Volume9
Issue number1
DOIs
StatePublished - Jan 1 1984

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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