fig3

Figure 3. (A) FTIR spectra of PAF-1 (black), PAF-1-Cl (red), PAF-1-NH-Boc (blue) and PAF-1-NH2 (green); (B) The TEM image of PAF-1-NH2; (C-E) EDS maps of S, N and corresponding to (C). FTIR: Fourier transform infrared spectroscopy; PAF-1: porous aromatic framework-1; TEM: transmission electron microscopy; EDS: energy-dispersive X-ray spectroscopy.