Microporous membrane with ionized sub-nanochannels enabling highly selective monovalent and divalent anion separation.

ABSTRACT: Membranes tailored for selective ion transport represent a promising avenue toward enhancing sustainability across various fields including water treatment, resource recovery, and energy conversion and storage. While nanochannels formed by polymers of intrinsic microporosity (PIM) offer a compelling solution with their uniform and durable nanometer-sized pores, their effectiveness is hindered by limited interactions between ions and nanochannel. Herein, we introduce the randomly twisted V-shaped structure of Tröger's Base unit and quaternary ammonium groups to construct ionized sub-nanochannel with a window size of 5.89-6.54 Å between anion hydration and Stokes diameter, which enhanced the dehydrated monovalent ion transport. Combining the size sieving and electrostatic interaction effects

SUBMITTER: Liu ML 

PROVIDER: S-EPMC11344077 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature