Hydroquinone is electro-oxidatively polymerized to poly(dihydroxyphenylene) on the Pt electrode, whose structure was confirmed by spectroscopic measurements. The polymerization proceeds via an oxidative and cationic mechanism. The poly(dihydroxyphenylene) thus formed is a Nernstian-type electro-active polymer (E°=0.7 V vs. Ag/AgCl in an acidic medium) and shows a redox reaction through two-electron transfer, accompanied by proton dissociation on the Pt electrode.
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Yamamoto et al. (1990) studied this question.
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