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. 2022 Dec 1;15(3):413–423. doi: 10.1038/s41557-022-01094-w

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© The Author(s) 2022, corrected publication 2023

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Fig. 1 — a, Schematic representation of the acid-catalysed 24-fold imine condensation of chiral triamino-TBTQ 1 and 2,5-dihydroxy-terephthalaldehyde 2 to OH-cube. Note that the alkyl substituents of TBTQ are omitted from the cubic structure of OH-cube for clarity. Reactants and cube are also drawn as cartoons. Red balls represent the TBTQ units and blue struts the aldehyde or imine linker units. b, ¹H NMR spectrum (500 MHz, CD₂Cl₂, r.t.) of pure OH-cube. For assignment, see atom labels in the molecular structure of OH-cube in a and Supplementary Information, section 2. c, MALDI–TOF mass spectrum (DCTB) of pure OH-cube. Inset: comparison of measured and calculated isotopic patterns for OH-cube.