fig1
![Molecular engineering toward large pore-sized covalent organic frameworks](https://image.oaes.cc/fb361da7-32a2-4393-ae05-1da30b195551/cs3063.fig.1.jpg)
Figure 1. Schematics for the synthesis of Py-MV-DBA-COF and Py-DBA-COF 2. (i) 3-Pentanone/Mesitylene = 2/1 (v/v), 105 °C and 3 days; (ii) 3-Pentanone/Mesitylene = 2/1 (v/v), 105 °C and 3 days. DBA: Dehydrobenzoannulene; COF: covalent organic framework.