fig9

Figure 9. The schematic diagram of (A) the surface cation exchange, (B) free cation exchange, and (C) destructive cation exchange with an example of Ag⁺ replacing Zn²⁺; The schematic diagram of (D) shows a new structure in MTV-ZIFs. (A) Adapted with permission^[183]. Copyright 2020, The Royal Society of Chemistry; (B) Adapted with permission^[184]. Copyright 2022, Elsevier; (C) Adapted with permission^[185]. Copyright 2020, American Chemical Society; (D) Adapted with permission^[186]. Copyright 2022, American Chemical Society. MTV: Multivariate; ZIFs: zeolitic imidazolate frameworks.