Synchrotron X-ray diffraction data of COF-300 powder: X-ray diffraction measurements were performed at XALOC-BL13 beamline at Alba synchrotron (Bellaterra (Barcelona), Spain), using a photon energy of 15 keV. The flocculated powder in ethanol solution was sealed in a glass capillary. The 2D Debye-Scherrer diffraction rings from powder measurements were collected on a PILATUS 6M DECTRIS detector and integrated using the Dioptas software package. Pawley refinements were performed using GSAS-II software. Field-Emission Scanning Electron Microscopy: Scanning electron microscopy (SEM, Zeiss ULTRA 55) images of the COFBOTs, COF-300 nanoparticles and nanorods were taken operating at 5 kV. The colloidal suspension was drop casted onto a silicon wafer and lightly washed with ethanol to remove the surfactants. After drying at ambient conditions, the samples were sputtered with Au/Pd. An energy-dispersive Xray (EDX) detector was used for elemental mapping analysis, operating at 20 kV.