Fig. 2: Material characterizations of Tp-Py-COF.

FTIR spectra of Tp, Py, and Tp-Py-COF (a), ¹³C NMR spectroscopy (b), N 1 s XPS spectrum (c), N₂ adsorption-desorption isotherm (d), SEM image (e), and TEM image (f). Source data are provided as a Source Data file.