Dual-regulated covalent organic framework membranes with near-theoretical pore sizes for angstrom-scale ion separations.

ABSTRACT: Fabricating covalent organic framework (COF) membranes with molecular size cutoffs matching theoretical pore sizes is essential for selective angstrom-scale aqueous separations. We report a dual-regulation interfacial polymerization strategy to fabricate COF membranes with pore sizes approaching theoretical values, using Brønsted acid and organobase in separate phases to synchronously control polymerization and self-healing, as supported by molecular simulations of monomer diffusion and liquid chromatography-mass spectrometry analysis for component tracing. The dual-regulation COF membranes achieve a selectivity of 267 in single-salt test and an actual selectivity of 234 for K⁺/Mg²⁺ in binary systems, demonstrating a threefold increase in mono/divalent cation separati

SUBMITTER: Hu XF 

PROVIDER: S-EPMC12609051 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature