fig3
![Molecular engineering toward large pore-sized covalent organic frameworks](https://image.oaes.cc/fb361da7-32a2-4393-ae05-1da30b195551/cs3063.fig.3.jpg)
Figure 3. Comparison of naphthalene diimide units with (A) boronate ester linkage, (B) imide linkage, and imine-linked structures.
Figure 3. Comparison of naphthalene diimide units with (A) boronate ester linkage, (B) imide linkage, and imine-linked structures.
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