Abstract
A mesoporous metal-organic framework Cu 3 (PTB) 2 (H 2 O) 3 · guest (denoted as SUMOF-5) has been synthesized using a new tritopic linker pyridine-2,4,6-tribenzoic acid (H 3 PTB). SUMOF-5 is cubic with the space group Fm-3m and a = 47.272(3) Å. The framework is built of the dicopper paddle-wheel secondary building unit (SBU) [Cu 2 (OOC) 4 (H 2 O) 2 ] and contains two different äcavities of 1.22 and 2.33 nm in diameter, respectively. The framework topology follows the (3,4)-connected tbo net, and can be regarded as an extended version of Cu 3 (BTC) 2 (H 2 O) 3 · guest (HKUST-1, BTC = benzene tricarboxylate). The structure of SUMOF-5 is compared to other MOFs built from dicopper paddle-wheels and tritopic linkers. SUMOF-5 has permanent porosity with a Langmuir surface area of 1733 m 2 /g and is stable in various organic solvents, which makes this material potentially useful as a crystalline carrier for loading molecular catalysts or drugs.
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