Journal
MACROMOLECULES
Volume 51, Issue 5, Pages 1681-1687Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.7b02546
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Funding
- National Science Foundation [NSF CAREER DMR-1351293, DMR-1506726]
- Army Research Office [W911NF-13-1-0363]
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Ion transport in polymerized ionic liquids (poly-ILs) occurs via a fundamentally different mechanism than in monomeric ionic liquids, and recently progress has been made toward understanding ion conduction in poly-ILs. To gain insight into the nature of ionic conductivity in ionic polymers, we investigate the physical properties of the trisaminocyclopropenium (TAC) ion, as it is an aromatic carbocation with unique structural and electronic properties. Herein, we characterize the thermal properties, local morphology, and dielectric response of a series of monomeric and polymeric TAC ionic liquids with different counterions. We have found that the extent of a superionic mechanism depends on the nature of the ion pair and can result in anomalously high conductivity at the calorimetric T-g. Our results suggest that the molecular volumes of the cationic and anionic species are important parameters that impact ion conductivity inpolymerized ionic liquids.
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