Fig. 2: Structural characterization of TpAzo, TpAzo-Pd and TpAzo-CPd COFs.

a, Powder X-ray diffraction patterns, including a simulated TpAzo pattern. The inset graph shows a close-up of the region corresponding to the 001 reflection. b, N2 sorption isotherms. Pore size distributions are displayed in the inset graph. STP, standard temperature and pressure. c, 13C solid-state NMR. The shaded area highlights the C–Pd signal in TpAzo-CPd. d, Raman spectra after baseline correction. The shaded area highlights the emerging vibrations in TpAzo-CPd.