fig4

Figure 4. (A-F) Conjugated ligands (left), TEM images (middle) and the corresponding EELS mapping (right). Scale bars represent 500 nm for middle TEM images and 200 nm for right TEM images. Reproduced with permission from ref.^[36]. Copyright 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH; (G) Schematic overview of the two-stepped transformation mechanism of ZIF-8 NPs to hollow Zn-HHTP NPs. Reproduced with permission from ref.^[36]. Copyright 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH; (H) The synthesis of hollow SBP colloidal microspheres; Reproduced with permission from ref.^[37] Copyright 2022 American Chemical Society; (I) TEM images of SBP-0, SBP-0.05, SBP-0.2, SBP-0.5, and SBP-1. Reproduced with permission from ref.^[37] Copyright 2022 American Chemical Society; (J and K) TEM and HAADF-STEM images of the benzene-bridged HMOSNs synthesized via the in situ dissolution and reassembly strategy. Reproduced with permission from ref.^[59]. Copyright 2019 American Chemical Society; (L) Schematic illustration for the fabrication of MCMOS. SEM (M) and TEM (N and O) images of DMSNs. Reproduced with permission from ref.^[60]. Copyright 2021 Springer Nature. TEM: Transmission electron microscope; EELS: electron energy loss spectroscopy; HHTP: 2,3,6,7,10,11-hexahydroxytriphenylen; NP: nanoparticle; SBP: Schiff base polymer; HAADF-STEM: high angle angular dark field-scanning transmission election microscope; HMOSN: hybrid silica nanoparticle; MCMOS: multicompartmentalized mesoporous organosilica; SEM: scanning electron microscope; DMSN: dendritic mesoporous silica nanoparticle.