fig3

Figure 3. (A) Schematic diagram of the structures of PI-COFs for drug adsorption; (B) UV-vis spectra of ibuprofen in simulated body fluid at different concentrations; (C) Release profiles of ibuprofen -loaded 3D PI-COFs. Reproduced with permission from ref^[48], Copyright 2015 from American Chemical Society. COFs: Covalent organic frameworks; 3D: three-dimensional.