A negatively-charged supramolecular trap for precisely catching strontium ion.

ABSTRACT: Due to the analogous physicochemical properties and weak coordination ability of alkali and alkaline earth metals, accurate separation of radioactive ⁹⁰Sr from groundwater or seawater still presents a big challenge in environmental radioactivity remediation. Here we mimic the complexation behavior of molecular crown-ether carboxylic acids to construct an elegant negatively charged supramolecular trap in an anionic crown ether-based metal-organic framework (ZJU-X99) for precisely catching Sr²⁺. Owing to the synergistic effects of electrostatic interactions arising from the In(COO)₄^- nodes and supramolecular host-guest recognition from the 18-crown-6 rings, ZJU-X99 exhibits rapid adsorption kinetics (1 min), high adsorption capacity (263 mg/g), and

SUBMITTER: Li L 

PROVIDER: S-EPMC11914263 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature