A carbazole N-substituted by an oxyethylene group was polymerized using oxidative electro-polymerization.Due to the hydrophilic properties of the oligooxyethylene substituent,this monomer can be electropolymerized in aqueous solution.An acidic medium is particularly appropiriate in order to decrease the oxidation potential of the monomer and to obtain films mainly composed of oligomers as revealed by SEC analysis.More particularly interesting is the stability of such material during polarization.In acidic medium 1.25 mol·L~(-1) HClO_4,95% of the charge density was maintained after polarization for 7000 cycles which shows the good electrochemical stability of this material compared to other polycarbazoles.Moreover,films are electroactive in aqueous electrolytes and would be well-compatible with polyethylene-oxide solid electrolytes.
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