Starting with the measured IR spectra displayed in Figure , we observe additional bands for the wet sample at following three wavenumbers 800 -900 cm -1 , 1600 cm -1 , and, arguably, at 2850 -3050 cm -1 , which are not present in the spectrum of the dry COF-1 sample. These bands are highlighted in yellow, green, and blue, respectively, in Figure . Otherwise, both measured spectra are very similar.