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(A) Formation of a boroxine-linked COF as a monolayer when confined to a surface and annealed in the presence of H2O to yield large crystalline domains. (B) STM image of a BPDA COF monolayer grown by this method. (Inset is the Fourier transform of the STM image.) Adapted with permission from ref (107). Copyright 2011 The Royal Society of Chemistry.
