Fig. 2: Porous properties, crystallinity and stacking structure.

a N2 adsorptionâdesorption isotherm and pore size distribution profile (inset) of DEG-HEP-COF. b PXRD profiles of DEG-HEP-COF of the experimentally observed (red), Pawley refined (black), their difference (orange), simulated (cyan) using the contorted AA stacking mode, and the observed reflections (green). c Side and top view of the contorted eclipsed (AA) structure of DEG-HEP-COF (gray: C, blue: N, red: O, white: H). d HR-TEM image of DEG-HEP-COF. (The three independent samples were recorded, and 1 representative image is shown). Source data are provided as a Source Data file.