Confining H₃PO₄ network in covalent organic frameworks enables proton super flow.

ABSTRACT: Development of porous materials combining stability and high performance has remained a challenge. This is particularly true for proton-transporting materials essential for applications in sensing, catalysis and energy conversion and storage. Here we report the topology guided synthesis of an imine-bonded (C=N) dually stable covalent organic framework to construct dense yet aligned one-dimensional nanochannels, in which the linkers induce hyperconjugation and inductive effects to stabilize the pore structure and the nitrogen sites on pore walls confine and stabilize the H₃PO₄ network in the channels via hydrogen-bonding interactions. The resulting materials enable proton super flow to enhance rates by 2-8 orders of magnitude compared to other analogues. Temperature profile and molecular dynamics reveal proton hopping at low activation and reorganization energies with greatly enhanced mobility.

SUBMITTER: Tao S 

PROVIDER: S-EPMC7181855 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature