Ordered Macro–Microporous Single Crystals of Covalent Organic Frameworks with Efficient Sorption of Iodine

Fashioning microporous covalent organic frameworks (COFs) into single crystals with ordered macropores allows for an effective reduction of the mass transfer resistance and the maximum preservation of their intrinsic properties but remains unexplored. Here, we report the first synthesis of three-dimensional (3D) ordered macroporous single crystals of the imine-linked 3D microporous COFs (COF-300 and COF-303) via a template-assisted modulated strategy. In this strategy, COFs crystallized within the sacrificial colloidal crystal template, assembled from monodisperse polystyrene microspheres, and underwent an aniline-modulated amorphous-to-crystalline transformation to form large single crystals with 3D…

• NN
  National Natural Science Foundation of China

  Awards: 22161132026, 21971184, 51821002
• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions
• CI
  Collaborative Innovation Center of Suzhou Nano Science and Technology
• HE
  Higher Education Discipline Innovation Project