Control of random self-assembly of pyrogallol[4]arene-based nanocapsule or framework

The controlled self-assembly of discrete metal-organic nanocapsules (MONCs), and metal-organic frameworks (MOFs) based on the MONCs are achieved. Specifically, the solvothermal reaction of nickel nitrate hexahydrate and C-methylpyrogallolKarene in mixed DMF/MeOH solution leads to the unexpected form of discrete nickel-seamed hexameric pyrogallol[4]arene MONCs, and MONC-based three-dimensional (3D) MOF. Notably, the latter MOF is constructed from the aforementioned nickel-seamed MONC building blocks and formate linkers in-situ generated from the hydrolysis of DMF solvent. Interestingly, introducing pyridine and formic acid in the reaction conditions leads to the controlled assemblies of the discrete MONC and MONC-based 3D MOF structures. Moreover, the variable-temperature magnetic susceptibilities of both the abovementioned compounds have been investigated, indicating typical antiferromagnetic interactions between the metal centers. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.