A New Solid-State Proton Conductor: The Salt Hydrate Based on Imidazolium and 12-Tungstophosphate.

ABSTRACT: We report the structure and charge transport properties of a novel solid-state proton conductor obtained by acid-base chemistry via proton transfer from 12-tungstophosphoric acid to imidazole. The resulting material (henceforth named Imid₃WP) is a solid salt hydrate that, at room temperature, includes four water molecules per structural unit. To our knowledge, this is the first attempt to tune the properties of a heteropolyacid-based solid-state proton conductor by means of a mixture of water and imidazole, interpolating between water-based and ionic liquid-based proton conductors of high thermal and electrochemical stability. The proton conductivity of Imid₃WP·4H₂O measured at truly anhydrous conditions reads 0.8 × 10^-6 S cm^-1 at 322

SUBMITTER: Martinelli A 

PROVIDER: S-EPMC8414554 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature