Recent Progress in the Fabrication of Low Dimensional Nanostructures via Surface-Assisted Transforming and Coupling

Figure 6

(a) Reaction scheme of the self-condensation of para-diboronic acids into 2-dimensional (2D) COFs. (b) The methodology about different monomers used for the self-condensation ending in forming 2D nanonet with diversified size of porous structure inside. (c) The process of self-condensation of para-diboronic acids controlled and regulated by means of water released or obtained to gain large-scale and high-ordered 2D nanosheet. (d) Another type of condensation of boronic acids occurred between diboronic acid BDBA and hexahydroxytriphenylene HHTP simultaneously generating a five-membered ring. Figures are adopted with permission from [13].

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