Khatua Sajal, Bar Arun Kumar, Sheikh Javeed Ahmad, Clearfield Abraham, Konar Sanjit
Department of Chemistry, IISER Bhopal, Bhopal By-Pass Road, Bhopal, 462066, Madhya Pradesh, India.
Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA.
Chemistry. 2018 Jan 19;24(4):872-880. doi: 10.1002/chem.201704088. Epub 2017 Dec 13.
Treatment of a pyrazine (pz)-impregnated Cu 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 S cm 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 S cm under humid conditions. The impregnated pyrazinium ions play a crucial role in protonic conductivity, which occurs through a Grotthuss mechanism.
用HCl蒸汽处理浸渍有吡嗪（pz）的铜金属有机框架（MOF）（[1⊃pz]），得到一种间隙氯化吡嗪鎓盐杂化MOF（[1⊃pz⋅6 HCl]），该MOF在无水和潮湿条件下均表现出超过10 S cm的质子传导率。在已知的在无水和潮湿条件下均表现出质子传导率的基于MOF的材料中，框架[1⊃pz⋅6 HCl]具有最高的无水质子传导率。此外，[1⊃pz]以及相应的硫酸吡嗪鎓和磷酸吡嗪鎓杂化MOF在潮湿条件下也表现出超过10 S cm的超质子传导率。浸渍的吡嗪鎓离子在质子传导中起关键作用，质子传导通过Grotthuss机制发生。
