Precise modulation of MOF pore structures via functional group dimensions and spatial configuration for membrane separation.

ABSTRACT: Traditional petroleum distillation faces high energy demands, necessitating innovative alternatives like membrane separation. This study presents a breakthrough in dual-range and precise pore size modulation of metal-organic frameworks (MOFs) through a ligand functionalization strategy. By tailoring steric configurations and spatial orientations of light-responsive azobenzene groups, we achieved broad-range pore tuning (0.41 to 0.68 nanometers) via functional group length variation, coupled with subnanometer precision through reversible trans-to-cis photoisomerization. Four representative branched alkanes were selected to validate the MOF's high selectivity. Results showed its capacity to generate a constant carbon-atom-count-dependent permeation gradient, realizing a four-step sequential

SUBMITTER: Sun W 

PROVIDER: S-EPMC12922737 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature