Fig. 8
From: Sub-stoichiometric 2D covalent organic frameworks from tri- and tetratopic linkers
Summary of the unique features of the sub-stoichiometric and the three-component COFs. a bex network topology. b Supramolecular ribbon-like motifs as secondary building units for hierarchical design. c Highly crystalline and porous, dual pore COFs. d Free functional groups by sub-stoichiometric design—free amines in an imine-linked COF, functionalizable, and catalytically active. e Combination of tetratopic and triangular linkers—dual linking mode of tetratopic molecule. f Combination of di-, tri-, and tetratopic linkers
