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  • Title: Chemical and structural stability of zirconium-based metal-organic frameworks with large three-dimensional pores by linker engineering.
    Author: Kalidindi SB, Nayak S, Briggs ME, Jansat S, Katsoulidis AP, Miller GJ, Warren JE, Antypov D, Corà F, Slater B, Prestly MR, Martí-Gastaldo C, Rosseinsky MJ.
    Journal: Angew Chem Int Ed Engl; 2015 Jan 02; 54(1):221-6. PubMed ID: 25521699.
    Abstract:
    The synthesis of metal-organic frameworks with large three-dimensional channels that are permanently porous and chemically stable offers new opportunities in areas such as catalysis and separation. Two linkers (L1=4,4',4'',4'''-([1,1'-biphenyl]-3,3',5,5'-tetrayltetrakis(ethyne-2,1-diyl)) tetrabenzoic acid, L2=4,4',4'',4'''-(pyrene-1,3,6,8-tetrayltetrakis(ethyne-2,1-diyl))tetrabenzoic acid) were used that have equivalent connectivity and dimensions but quite distinct torsional flexibility. With these, a solid solution material, [Zr6 O4 (OH)4 (L1)2.6 (L2)0.4 ]⋅(solvent)x , was formed that has three-dimensional crystalline permanent porosity with a surface area of over 4000 m(2)  g(-1) that persists after immersion in water. These properties are not accessible for the isostructural phases made from the separate single linkers.
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