Abstract
A mesoporous metal-organic framework Cu3(PTB)2(H2O)3 · guest (denoted as SUMOF-5) has been synthesized using a new tritopic linker pyridine-2,4,6-tribenzoic acid (H3PTB). 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) [Cu2(OOC)4(H2O)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 Cu3(BTC)2(H2O)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 m2/g and is stable in various organic solvents, which makes this material potentially useful as a crystalline carrier for loading molecular catalysts or drugs.
© by Oldenbourg Wissenschaftsverlag, München, Germany