Covalent organic frameworks (COFs) have wide applications but are difficult to enhance crystallinity. Here, the authors show COFs with 2.5-dimensional skeletons. The COFs attain planar shapes useful for applications, large crystal sizes of above 0.1 mm, and better CO2 separation properties over previous organic porous materials.
- Tomoki Kitano
- Syunto Goto
- Yoichi Murakami
