fig8

Figure 8. Different pore structures of COFs and the preparation process of COF nanosheets. (A) TP-COF. Figure reproduced with permission from Wan et al.^[96] (Copyright © 2008 Wiley). (B) 2,3‑DhaTph-COF. Figure reproduced with permission from Shinde et al.^[97] (Copyright © 2014 Royal Society of Chemistry). (C) Py‑azine-COF. Figure reproduced with permission from Dalapati et al.^[98] (Copyright © 2013 American Chemical Society). (D) TPE‑Ph-COF. Figure reproduced with permission from Dalapati et al.^[99] (Copyright © 2016 American Chemical Society). (E) TTF‑Ph-COF. Figure reproduced with permission from Jin et al.^[100] (Copyright © 2014 Wiley). (F) HBC-COF. Figure reproduced with permission from Dalapati et al.^[101] (Copyright © 2015 Nature). (G) D_CuPc-A_DI-COF. Figure reproduced with permission from Jin et al.^[102] (Copyright © 2013 Wiley). (H) D_TP-A_NDI-COF. Figure reproduced with permission from Jin et al.^[103] (Copyright © 2013 Royal Society of Chemistry). (I) TP-Por-COF. Figure reproduced with permission from Calik et al.^[104] (Copyright © 2014 American Chemical Society). (J) Preparation of COF nanosheets by mechanical exfoliation. Figure reproduced with permission from Berlanga et al.^[106] (Copyright © 2019 Wiley). COFs: Covalent organic frameworks.