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An efficient strategy towards small bandgap polymers: The rigidification of the π-conjugated system

Authors

  • Dr. Jean Roncali,

    Corresponding author
    1. Ingénierie Moléculaire et Matériaux Organiques CNRS EP 66, Université d'Angers 2 Bd Lavoisier, F-49045 Angers (France)
    • Ingénierie Moléculaire et Matériaux Organiques CNRS EP 66, Université d'Angers 2 Bd Lavoisier, F-49045 Angers (France)
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  • Dr. Christine Thobie-Gautier

    1. Ingénierie Moléculaire et Matériaux Organiques CNRS EP 66, Université d'Angers 2 Bd Lavoisier, F-49045 Angers (France)
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Abstract

The design of narrow bandgap polymers remains a major challenge in the field of organic conductors. An alternative scheme is proposed for reducing the bandgap, namely the construction of a one-dimensional graphitelike chain. Terthienyl frozen in a fully planar syn conformation is used as a simplified model compound for rigidified polythiophene. Its synthesis, cyclic voltammetry results, and electropolymerization are reported, which suggest that even smaller bandgaps could be produced in polythiophenes using this strategy.

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