Metalo Hydrogen‐Bonded Organic Frameworks (MHOFs) as New Class of Crystalline Materials for Protonic Conduction. Issue 7 (2nd January 2019)

• Record Type: Journal Article
• Authors: Chand, Santanu; Pal, Shyam Chand; Pal, Arun; Ye, Yingxiang; Lin, Quanjie; Zhang, Zhangjing; Xiang, Shengchang; Das, Madhab C.
• Is Part Of: Chemistry. Volume 25:Issue 7(2019)
• Page Start: 1691
• Page End: 1695
• Publication Date: 2019-01-02
• Subjects: arene sulfonate -- imidazole -- metalo hydrogen-bonded organic frameworks (MHOFs) -- proton conduction; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201805177
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Recently, proton conduction has been a thread of high potential owing to its wide applications in fuel‐cell technology. In the search for a new class of crystalline materials for protonic conductors, three metalo hydrogen‐bonded organic frameworks (MHOFs) based on [Ni(Imdz)6 ] 2+ and arene disulfonates (MHOF1 and MHOF2) or dicarboxylate (MHOF3) have been reported (Imdz=imidazole). The presence of an ionic backbone with charge‐assisted H‐bonds, coupled with amphiprotic imidazoles made these MHOFs protonic conductors, exhibiting conduction values of 0.75×10 −3, 3.5×10 −4 and 0.97×10 −3 S cm −1, respectively, at 80 °C and 98 % relative humidity, which are comparable to other crystalline metal‐organic framework, coordination polymer, polyoxometalate, covalent organic framework, and hydrogen‐bonded organic framework materials. This report initiates the usage of MHOF materials as a new class of solid‐state proton conductors. Abstract : Conduct protons : Metalo hydrogen‐bonded organic frameworks (MHOFs) self‐assembled through charge‐assisted H‐bonding interactions between cationic metal‐imidazole and anionic diarene sulfonate/carboxylate exhibit super‐protonic conduction and inaugurate the usage of MHOFs as new class of solid‐state proton conductors.