Fig. 21. (a) Schematic illustration of the synthesis of different HCPs for benzylamine oxidation and H₂O₂ production. (Reprinted with permission from ref. 204. Copyright 2024, Wiley-VCH GmbH.) (b) Schematic of the synthesis of POP-DT and POP-DF. (Reprinted with permission from ref. 205. Copyright 2024, Royal Society of Chemistry.) (c) Structural representation of TpMaTAE. (d) Surface potential values of TpMa, TpTAE, and TpMaTAE. (e) Photocatalytic H₂O₂ production with TpMa, TpTAE, and TpMaTAE when light is on and off. (f) Mechanism of H₂O₂ production and the built-in an electric field and the schematic of the synthesis of POP-DT and POP-DF. (Reprinted with permission from ref. 208. Copyright 2024, Wiley-VCH GmbH.).