Enhancing ion selectivity by tuning solvation abilities of covalent-organic-framework membranes.

ABSTRACT: Understanding the molecular-level mechanisms involved in transmembrane ion selectivity is essential for optimizing membrane separation performance. In this study, we reveal our observations regarding the transmembrane behavior of Li⁺ and Mg²⁺ ions as a response to the changing pore solvation abilities of the covalent-organic-framework (COF) membranes. These abilities were manipulated by adjusting the lengths of the oligoether segments attached to the pore channels. Through comparative experiments, we were able to unravel the relationships between pore solvation ability and various ion transport properties, such as partitioning, conduction, and selectivity. We also emphasize the significance of the competition between Li⁺ and Mg²⁺ with the solvati

SUBMITTER: Meng QW 

PROVIDER: S-EPMC10895279 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature