Unblocking Ion-occluded Pore Channels in Poly(triazine imide) Framework for Proton Conduction.

ABSTRACT: Poly(triazine imide) or PTI is an ordered graphitic carbon nitride hosting Å-scale pores attractive for selective molecular transport. AA'-stacked PTI layers are synthesized by ionothermal route during which ions occupy the framework and occlude the pores. Synthesis of ion-free PTI hosting AB-stacked layers has been reported, however, pores in this configuration are blocked by the neighboring layer. The unavailability of open pore limits application of PTI in molecular transport. Herein, we demonstrate acid treatment for ion depletion which maintains AA' stacking and results in open pore structure. We provide first direct evidence of ion-depleted open pores by imaging with the atomic resolution using integrated differential phase-contrast scanning transmission electron microscopy. Dependin

SUBMITTER: Chi HY 

PROVIDER: S-EPMC9804837 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature