Synthesis and characterization of a conjugated polymer with the long alkyl substituents: Poly(2-ethynyl-N-octadecylpyridinium bromide)

► Synthesis of a conjugated ionic polymer with long alkyl substituents with high yield ► The conjugated polymer backbone system was confirmed by instrumental analysis data. ► The photoluminescence peak at 596 nm corresponds to photon energy of 2.08 eV. ► This material showed well-defined and stable redox process.