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A new polyacetylene-based polyelectrolyte with the ferrocene-containing pyridinium substituents was synthesized by the quaternization polymerization of 2-ethynylpyridine using (6-bromo-1-oxohexyl)ferrocene. The analysis results on the chemical structure of the resulting polymer revealed that it contains the conjugated polymer backbone system with the bulky N-(6-ferrocenyl-6-oxohexyl)pyridinium bromide substituents. The absorption spectrum exhibited the maximum peak of 519 nm which comes from the π → π∗ transition of the conjugated polyene group. The overall redox current shape showed irreversible results and the related values were very stable in the range of −1.5 V to 1.5 V under up to 50 cycles. The oxidation peak value was 0.5 V and 1.25 V and the reduction peak value was −1.3 V.

Polyacetylene-based polyelectrolyte by the quaternization polymerization of 2-ethynylpyridine using (6-bromo-1-oxohexyl)ferrocene