Abstract
Conductivity and Vis-NIR absorption spectra of polypyrrole films, doped with TsO−, ClO4−, Cl−, NO3−, were measured from room temperature to over 200°C. The conductivity behavior of the PPy films with the increase of temperature much depends on the nature of the counter-anions. For PPy(TsO−) film, there seems a phase transition at ca. 363 K, over which the conductivity increases with temperature more quickly and a red shift of its absorption peak in the NlR region occurs.
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Li, Y., Imaeda, K. & Inokuchi, H. Conductivity Characteristics and Vis-NIR Absorption Spectra of Polypyrrole Films at Higher Temperatures. Polym J 28, 559–562 (1996). https://doi.org/10.1295/polymj.28.559
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DOI: https://doi.org/10.1295/polymj.28.559