Cavity-size-directed supramolecular assembly of AIEgen networks for aqueous white-light emission

We demonstrate a cucurbit[<i>n</i>]urils (CB[<i>n</i>])-based strategy to direct the emission of AIEgens. While CB[7] enhances fluorescence <i>via</i> molecular motion restriction, the larger CB[8] induces a blue shift and enables co-encapsulation for an efficient FRET system with an anthracene guest, achieving white-light emission in water. This work establishes host size and guest alignment as key determinants for designing aqueous AIEgen materials.