Electrochemical preparation and properties of poly[N-(3,6-dioxaheptyl)aniline]

Electrochemical polymerization of N-(3,6-dioxaheptyl)aniline (NDHAn), which has two ethylene oxide units at N position, was performed to improve electrochemical redox activity of polyaniline. Poly-NDHAn showed reversible redox couple around 0.6 V (vs. SCE) based on the p-type doping and undoping reactions. Another irreversible redox couple was observed at −1.2 V and −0.1 V due to the n-type doping-undoping reactions of poly-NDHAn in acetonitrile solution containing Li cation. The molecular weight of poly-NDHAn was high (1,200,000) and the conductivity value was 9.4 × 10−4 Scm−1.