Reversible iodine capture by nonporous adaptive hybrid[3]arene crystals

, respectively. The adsorption of iodine molecules by 1α is driven by C-H⋯I and O-H⋯I interactions. Notably, 1α can be effectively recycled at least 10 times without a significant reduction of iodine capture capacity. It is anticipated that this work will provide valuable insights into the design of nonporous adaptive crystals as versatile platforms for radioactive iodine capture with recyclability.