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Development of polymer–dopant interactions during electropolymerization, a key factor in determining the redox behaviour of conducting polymers

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Abstract

Investigation of ionic motion in connection with the redox transformation of conjugated polymers (CP) has always been at the leading edge of research. Motivated by recent proofs for the chemical bond formation between chloride ion and α-positioned carbon in poly (3,4–ethylenedioxythiophene) (PEDOT), comprehensive studies have been extended to another strongly electronegative halide (F−) and to another CP, polypyrrole (PPy). As the electrochemical quartz crystal nanobalance (EQCN) results proved, the movement of the bulky Bu4N+ cations has been exclusively experienced during the redox processes of both systems. Moreover, the decisive role of the anions being present in the polymerization solution in determining the redox capacity and, consequently, the maximum doping level of the films was evidenced. On the grounds of the systematic experiments, the strong and permanent chemical interaction of highly electronegative anions and the polymer has been demonstrated as a general phenomenon. Importantly, this observation requires the necessary reconsideration of specific polymer–dopant interactions and calls attention to the necessity of careful design of the polymerization procedure.

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Acknowledgments

This work has been sponsored by the National Development Agency (NFÜ) under contract no. TÁMOP-4.2.2.A-11/1/KONV-2012-0047.

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Authors and Affiliations

  1. Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Square 1. Sq. Aradi vt., Szeged, 6720, Hungary

    Péter S. Tóth, Balázs Endrődi, Csaba Janáky & Csaba Visy

  2. MTA-SZTE “Lendület” Photoelectrochemistry Research Group, Rerrich Square 1, Szeged, 6720, Hungary

    Balázs Endrődi & Csaba Janáky

Authors
  1. Péter S. Tóth
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  2. Balázs Endrődi
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  3. Csaba Janáky
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  4. Csaba Visy
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Correspondence to Csaba Visy.

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Tóth, P.S., Endrődi, B., Janáky, C. et al. Development of polymer–dopant interactions during electropolymerization, a key factor in determining the redox behaviour of conducting polymers. J Solid State Electrochem 19, 2891–2896 (2015). https://doi.org/10.1007/s10008-015-2791-1

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  • DOI: https://doi.org/10.1007/s10008-015-2791-1

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