fig4

Figure 4. Diagram of (A) linker function strategy, (B) opening the lock strategy, and (C) SALE strategy; (D) Topological structure changes with linker exchange. (A) Adapted with permission^[85]. Copyright 2008, American Chemical Society; (B) Adapted with permission^[135]. Copyright 2019, American Chemical Society; (C) Adapted with permission^[138]. Copyright 2012, American Chemical Society; (D) Adapted with permission^[139]. Copyright 2020, The Royal Society of Chemistry. SALE: Solvent-assisted linker exchange.