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. 2017 Feb 15;8:14442. doi: 10.1038/ncomms14442

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(a) Schematic illustration of the formation of molecular weaving in the active MOF layer constructed by BAB-TPDC quadritopic (4t) organic linker. (b) IRRAS, (c) Raman and (d) XRD results collected from the samples with 10 cycles ABAB-SURMOF system with a repeated growth of one layer of BAB-TPDC SURMOFs (MOF-A) and one layer of BMB-TPDC SURMOFs (MOF-B), here one cycle includes one layer of A and one layer of B. In b–d, the initial spectrum is black, the spectrum after coupling is red, and spectrum after acid treatment is blue.