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 I 2 , CH 3 I, and I 3 − 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 I 2 and ~0.74 g/g for CH 3 I at 25 °C under dynamic adsorption conditions. Subsequently, post-synthetic methylation of ACOF-1…

• NS
  National Science Foundation
• NZ
  New Zealand Government
• RS
  Royal Society Te Apārangi
• NN
  National Natural Science Foundation of China

  Awards: 22006036, U2167218, 22276054, U2067215