Fig. 5. FT-IR spectra of a thin film of the imine motor 2 (a) and m₂₀-COF (b) under prolonged irradiation at 365 nm (UV-LED). Grey area highlights appearing C O vibrations during irradiation of imine motor 2. Direct reflectance UV/vis spectra (c) and XRPD patterns (d) of m₂₀-COF before and during irradiation (>1.5 h) at 365 nm are shown. The patterns are stacked with an arbitrary offset to aid visibility.