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  • Title: Symmetry-guided synthesis of highly porous metal-organic frameworks with fluorite topology.
    Author: Zhang M, Chen YP, Bosch M, Gentle T, Wang K, Feng D, Wang ZU, Zhou HC.
    Journal: Angew Chem Int Ed Engl; 2014 Jan 13; 53(3):815-8. PubMed ID: 24218230.
    Abstract:
    Two stable, non-interpenetrated MOFs, PCN-521 and PCN-523, were synthesized by a symmetry-guided strategy. Augmentation of the 4-connected nodes in the fluorite structure with a rigid tetrahedral ligand and substitution of the 8-connected nodes by the Zr/Hf clusters yielded MOFs with large octahedral interstitial cavities. They are the first examples of Zr/Hf MOFs with tetrahedral linkers. PCN-521 has the largest BET surface area (3411 m(2) g(-1)), pore size (20.5×20.5×37.4 Å) and void volume (78.5%) of MOFs formed from tetrahedral ligands. This work not only demonstrates a successful implementation of rational design of MOFs with desired topology, but also provides a systematic way of constructing non-interpenetrated MOFs with high porosity.
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