Metalo Hydrogen-Bonded Organic Frameworks (MHOFs) as New Class of Crystalline Materials for Protonic Conduction |
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Authors: | Santanu Chand Shyam Chand Pal Arun Pal Yingxiang Ye Quanjie Lin Prof Zhangjing Zhang Prof Shengchang Xiang Dr Madhab C Das |
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Institution: | 1. Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302 India;2. College of Materials Science and Engineering, Fujian Provincial Key Laboratory of Polymer Materials, Fujian Normal University, 32 Shangsan Road, Fuzhou, 350007 PR China |
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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. |
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Keywords: | arene sulfonate imidazole metalo hydrogen-bonded organic frameworks (MHOFs) proton conduction |
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