Dimerization, Disproportionation and Ion Association Equilibria Within the Polymer Phase

3 Dimerization, Disproportionation and Ion Association Equilibria Within the Polymer Phase 

Based on the results of simultaneous measurements of electron spin resonance and ultraviolet-visible spectroscopy, it was suggested by Dunsch et al. [26] that the electrochemical transformations of PANl take place via an EE mechanism that include a disproportionation equilibrium  

The effect of ion association has also been considered by Vorotyntsev et al. in order to explain the splitting of the voltarmnetric waves [28]. It was assumed that ions inside the polymer film exist in two different forms free and bound. The bound ions may be associated with neutral sites of the polymer matrix, resulting from the formation of a bond or ion binding by microcavities or they may be due to the formation of P+C , B +C -type complexes. However, the results from cychc voltammetric and EQCM experiments on PP and PANI cannot be explained by the hypothesis based on complex formation, while the bound ion theory is appropriate for interpreting the unusual behavior observed [28]. 

Rishpon J, Redondo A, Derouin C, Gottesfeld S (1990) J Electroanal Chem 294 73 

Doblhofer K (1994) Thin polymer films on electrodes. In Lipkowski J, Ross PN (eds) Electrochemistry of novel materials. VCH, New York, p 141 

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