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Achieving Amphibious Superprotonic Conductivity in a Cu I Metal–Organic Framework by Strategic Pyrazinium Salt Impregnation
Author(s) -
Khatua Sajal,
Bar Arun Kumar,
Sheikh Javeed Ahmad,
Clearfield Abraham,
Konar Sanjit
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201704088
Subject(s) - anhydrous , conductivity , inorganic chemistry , salt (chemistry) , pyrazine , chemistry , metal organic framework , chloride , proton , metal , organic chemistry , adsorption , physics , quantum mechanics
Treatment of a pyrazine (pz)‐impregnated Cu I 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.