01776nas a2200205   4500008004100000245010200041210006900143260000800212300001600220490000600236520104000242100002001282700002101302700002501323700002601348700002201374700002401396700002101420856012901441       2017                        eng d00aEnhanced proton conduction by post-synthetic covalent modification in a porous covalent framework0 aEnhanced proton conduction by postsynthetic covalent modificatio  cJUL  a13659-136640 v53 aA highly chemically stable porous covalent framework (PCF-1) based on ether linkages has been synthesized, which exhibits no loss up to similar to 500 degrees C along with retention of integrity under acidic, basic and oxidative reagent conditions. Owing to its thermal and chemical stability, post-synthetic covalent modification was executed for the introduction of pendant sulphonic acid (-SO3H) groups. The covalently modified compound (PCF-1-SO3H) presents a remarkably high conductivity (ca. 0.026 S cm(-1)), with an similar to 130 fold enhancement in proton conductivity over the parent compound. This value is comparable with those of commercially used Nafion-based proton conducting materials and stands as the highest known value in the regime of post-synthetically modified porous organic frameworks. It is noteworthy to mention that PCF-1 is stable in both acidic and alkaline media, which is not commonly observed for most of the porous materials trialed as proton conducting materials, including metal organic frameworks.1 aSamanta, Partha1 aDesai, Aamod, V.1 aAnothumakkool, Bihag1 aShirolkar, Mandar, M.1 aKarmakar, Avishek1 aKurungot, Sreekumar1 aGhosh, Sujit, K.  uhttps://library.ncl.res.in/content/enhanced-proton-conduction-post-synthetic-covalent-modification-porous-covalent-framework