Branched 1,2,3-Triazolium-Functionalized Polyacetylene with Enhanced Conductivity

Area of Science:

• Polymer Chemistry
• Materials Science
• Electrochemistry

Background:

• Ionic polyacetylenes (iPAs) are polymers with potential applications in electronics.
• Developing materials with high ionic conductivity is crucial for advanced energy storage and electronic devices.

Purpose of the Study:

• To synthesize novel ionic polyacetylenes (iPAs) with branched triazolium pendants.
• To investigate the ionic and electronic conductivity of synthesized iPAs before and after doping.
• To evaluate the potential of doped iPAs in conducting polymers and polymeric electronics.

Main Methods:

• Metathesis cyclopolymerization of mono- or bissubstituted 1,6-heptadiynes to form iPAs.
• Doping treatment with lithium bis(trifluoromethanesulfonyl)imide.
• Further doping with iodine to induce dual conductivity.

Main Results:

• Synthesized iPAs exhibit intrinsic ionic conductivities ranging from 1.4 × 10^-5 to 2.1 × 10^-5 S cm^-1 at 30 °C.
• Doping with lithium bis(trifluoromethanesulfonyl)imide enhanced ionic conductivities to 2.5 × 10^-5 -4.3 × 10^-5 S cm^-1.
• Iodine doping resulted in dual ionic and electronic conductivities (4.5 × 10^-5 -7.1 × 10^-4 S cm^-1 and 1.5 × 10^-6 -4.5 × 10^-6 S cm^-1, respectively).

Conclusions:

• Doped ionic polyacetylenes show promising ionic and electronic conducting properties.
• The synthesized materials demonstrate significant potential for applications in conducting polymers and polymeric electronics.
• The study highlights a viable route for creating functionalized polyacetylenes with tunable conductivity.