Leucoemeraldine state, poly aniline

PANl can be prepared by the polymerization of aniline in an oxidizing medium, and the resulting polymer is found to be in a partially oxidized state [295]. Its molecular constitution is intermediate between that of poly(para-phenylene amine), which represents the so-called leucoemeraldine form, and that of poly(par o-phenylenc imine), known as the pemi-graniline form (Figure 1.45). Since the polymer is prepared under acidic conditions (HCl), it is also partly... 

No protons were found to he involved in both the first and second redox reactions of poly(N-methylaniline), but two anions each were taken up for two electrons removed from four aniline units for the oxidation of leucoemeraldine to emeraldine and its further oxidation to the second oxidation state. 

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