
%0 Journal Article
%A Baker, P 
%A Matthews, D 
%A Hope, A 
%T The Preparation and Characterization of Colloidal Polypyrrole
%J Australian Journal of Chemistry
%D 1994/01/01
%V 47
%N 1
%P 1-6
%K 
%R https://doi.org/10.1071/CH9940001
%U https://www.publish.csiro.au/paper/CH9940001 
%X This paper describes the preparation and properties of colloidal polypyrrole. The polypyrrole was prepared by the oxidation of pyrrole with potassium persulfate in acidic, 25% aqueous, ethanol at 95&#176;C. Absorption spectra showed that the reaction produced both unoxidized  polypyrrole (ppy0) and oxidized polypyrrole ( ppy +), which were separated by precipitating the ppy + with water. The resulting ppy + was readily redispersed in ethanol to yield a strongly coloured , transparent, dispersion. Cyclic voltammetry of the dispersion yielded well defined peaks for reduction and reoxidation with a standard reduction potential of approximately -0.39 V v . s.c.e . The ppy + was also characterized by fluorescence spectroscopy, proton magnetic resonance spectroscopy and electron microscopy. 
