Metathesis cyclopolymerization of mono- or bissubstituted 1,6-heptadiynes is undergone to generate the ionic polyacetylenes (iPAs) with branched 1,2,3-ttriazolium pendants, which possess relatively high intrinsic ionic conductivities of 1.4 × 10 -2.1 × 10 S cm at 30 °C. The doping treatment with lithium bis(trifluoromethanesulfonyl)imide endows iPAs with enhanced ionic conductivities of 2.5 × 10 -4.3 × 10 S cm . Further doping with iodine, iPAs show ionic and electronic dual conductivities of 4.5 × 10 -7.1 × 10 and 1.5 × 10 -4.5 × 10 S cm , respectively. Therefore, the doped iPAs demonstrate the potential in the area of conducting polymers and polymeric electronics.
Ionic poly(bisnorbornene)-based ladderphane can self-assemble into a tree ring-like nanostructure, and exhibits a high dielectric constant, low dielectric loss, narrow hysteresis loop, and good energy density.
The ionic polyacetylenes (iPAs) with dendritic 1,2,3‐triazolium‐containing oligo(ethylene glycol) (OEG) pendants are prepared by metathesis cyclopolymerization. The dendritic triazolium and flexible OEG pendants endow the iPAs with low glass transition temperature of −29.0 °C and enhanced intrinsic ionic conductivity (σi) of 5.0 × 10−5 S cm−1 at 30 °C under anhydrous conditions. After solution doping with bis(trifluoromethane)sulfonimide lithium (LiTFSI), the σi of iPAs reaches up to 5.2 × 10−4 S cm−1. When doped with iodine (I2), the iPAs exhibit high electronic conductivity (σe) of 1.3 × 10−5 S cm−1. If doped with both LiTFSI and I2, the iPAs demonstrate the best dual σi and σe of 8.3 × 10−4 and 1.2 × 10−5 S cm−1, respectively. Therefore, the dendritic triazolium‐OEG pendants‐functionalized iPAs display an improved conductive performance compared with the corresponding iPAs bearing dendritic triazolium‐alkyl pendants, or branched triazolium‐OEG pendants, before and after doping with different dopants, and will have the potential applications in electronics as the dual conductive materials.
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