Achieving Amphibious Superprotonic Conductivity in a CuI Metal–Organic Framework by Strategic Pyrazinium Salt Impregnation Academic Article uri icon

abstract

  • Treatment of a pyrazine (pz)-impregnated CuI metal-organic framework (MOF) ([1⊃pz]) with HCl vapor renders an interstitial pyrazinium chloride salt-hybridized MOF ([1⊃pz⋅6 HCl]) that exhibits proton conductivity over 10-2  S cm-1 both in anhydrous and under humid conditions. Framework [1⊃pz⋅6 HCl] features the highest anhydrous proton conductivity among the lesser-known examples of MOF-based materials exhibiting proton conductivity under both anhydrous and humid conditions. Moreover, [1⊃pz] and corresponding pyrazinium sulfate- and pyrazinium phosphate-hybridized MOFs also exhibit superprotonic conductivity over 10-2  S cm-1 under humid conditions. The impregnated pyrazinium ions play a crucial role in protonic conductivity, which occurs through a Grotthuss mechanism.

altmetric score

  • 0.25

author list (cited authors)

  • Khatua, S., Bar, A. K., Sheikh, J. A., Clearfield, A., & Konar, S.

citation count

  • 14

publication date

  • December 2017

publisher