Developments of Anhydrous Proton-Conducting Organic Crystals by Exploiting the Molecular Rotational Motions of Pentagonal Azolium Molecules

Despite many attempt to realize efficient anhydrous organic proton conductors, materials design guidelines have yet been established because of the lack of our knowledge about the mechanism. In this paper, our recent progress on understanding anhydrous proton conduction focusing on molecular rotational motions in organic crystalline solids is introduced.