Fig. 1: MOCOFs.

a, Reaction scheme for the synthesis of MOCOF-1. Dmt, 4,4′-dimethoxytrityl group; X, variable counteranion. b, Schematic representation of MOCOFs by the double extension of metal–organic and covalent organic linkages, compared with conventional MOFs, COFs and previous MOF–COF fusion examples with single extension. c, SCXRD structure of MOCOF-1 (298 K). Hydrogen atoms and solvent molecules are omitted for clarity.