Functionalized PCN-6 metal-organic frameworks

• Metal-organic frameworks.
• MOFs.
• PCN-6.
• Functionalized triazine.
• Stability.

Mono-substituted triangular linker molecules for metal-organic frameworks (MOFs) based on triazine-2,4,6-triyl-tribenzoate (TATB) were successfully synthesized with a nitro group in ortho (5a) and in meta (5b) position, as well as with an amino group (5c) in meta positon to the carboxylic acid. The synthetic route starts from substituted benzoyl chlorides 2 and the corresponding unsubstituted nitriles 1. Furthermore, the novel functionalized TATB-R linkers 5a-c were successfully used for the synthesis of microporous metal-organic frameworks based on the PCN-6 structure. Powder X-ray diffraction revealed identical high crystallinity of the PCN-6-R [R = –H, –NO2 (ortho or meta), -NH2 (meta)] structures. These MOF structures were found to exhibit different porosity, stability and color depending on the substitution of the linker.

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