Abstract
The counter-anion doping states of poly(N-methylpyrrole) (PNMP) were studied by elemental analysis, mass analysis, cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM) and Vis-NIR spectra measurement. A part of counter anions and H+ cations left the PNMP film when it was immersed in distilled water, leading to the mass loss of the film, and the pH value drop of the water. The electro-chemical activity and doping level of the polymer in aqueous solution decreased with the increase of the solution pH value. The protonic acid doping form is proposed as one of the doping forms in PNMP, and deprotonation takes place in neutral and basic aqueous solutions.
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Ouyang, J., Li, Y. Protonic Acid Doping Form in Poly(N-methylpyrrole). Polym J 28, 742–746 (1996). https://doi.org/10.1295/polymj.28.742
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DOI: https://doi.org/10.1295/polymj.28.742