Fig. 1: Synthesis, chemical structure, and morphology of the TG-PD COF.

a Sonochemical synthesis of TG-PDCOF, b, c SEM and HRTEM images of TG-PD COF, d Experimental (black) and simulated PXRD (red) patterns of TGH⁺-PD COF, e Geometrically optimized crystal structure of TG-PDCOF.