Engineering the pore environment of antiparallel stacked covalent organic frameworks for capture of iodine pollutants.

ABSTRACT: Radioiodine capture from nuclear fuel waste and contaminated water sources is of enormous environmental importance, but remains technically challenging. Herein, we demonstrate robust covalent organic frameworks (COFs) with antiparallel stacked structures, excellent radiation resistance, and high binding affinities toward I₂, CH₃I, and I₃^- under various conditions. A neutral framework (ACOF-1) achieves a high affinity through the cooperative functions of pyridine-N and hydrazine groups from antiparallel stacking layers, resulting in a high capacity of ~2.16 g/g for I₂ and ~0.74 g/g for CH₃I at 25 °C under dynamic adsorption conditions. Subsequently, post-synthetic methylation of ACOF-1 converted pyridine-N sites to cationic p

SUBMITTER: Xie Y 

PROVIDER: S-EPMC10965901 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature