Two-in-one tecton strategy to construct single crystalline hydrogen-bonded organic framework with high proton conductivity above 100 °C

By tactically integrating two different kinds of proton donors and acceptors into one supramolecular tecton, a new crystalline hydrogen-bonded organic framework ( HOF-SXU-1 ) has been developed. HOF-SXU-1 features a remarkable proton conductivity as high as 6.32 mS cm −1 and an extremely low activation energy of 0.16 eV at 160 °C under anhydrous N 2 conditions. By contrast, under identical conditions, the organic precursors of HOF-SXU-1 only exhibit negligible proton conduction performance, demonstrating that the formation of HOF is crucial for excellent proton conduction performance.