Abstract
In this paper, a convenient oxidants free acid polymerization method is developed to synthesize poly(3,4-ethylenedioxythiophene) (PEDOT). p-Toluenesulfonic acid (p-TsOH) is served as catalyst to direct polymerization of EDOT. The electron spin resonance spectra revealed that EDOT was protonated into radical species under p-TsOH. As-obtained PEDOT has a highest average degree of polymerization of 11.3 and the structure details are characterized by 1H NMR, GPC and FTIR. An acid promoted EDOT protonation polymerization mechanism is proposed and clarified.
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