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Three-Dimensional Metal-Organic Frameworks Based on Functionalized Tetracarboxylate Linkers: Synthesis, Strucures, and Gas Sorption Studies
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posted on 2009-03-16, 00:00 authored by Shuting Wu, Liqing Ma, La-Sheng Long, Lan-Sun Zheng, Wenbin LinNew tetracarboxylate ligands with dihydroxy (L1) and crown ether functionalities (L2) have been synthesized and treated with CuII and ZnII ions to generate three-dimensional (3D) metal-organic frameworks (MOFs) with the compositions of [Cu2(L1)(H2O)2]·14DMF·10H2O, 5, [Cu2(L2)(H2O)2]·12DMF, 6, [Zn6(μ4-O)(L1)2(L1-H2)]·35DMF·27H2O, 7, and [Zn3Na2(L2)2(DMF)2]·7DMF·14H2O, 8. The four compounds show different framework structures with different connectivities. Compound 5 exhibits the PtS topology whereas compound 6 has a [64.82]3[66] topology. Compound 7 adopts a new [4.65][42.68][44.62][45.6][48.610.83] topology while compound 8 exhibits the Flu topology. The porosity and H2 uptake were studied by gas sorption experiments and grand canonical Monte Carlo (GCMC) simulations. Compound 5 shows a high H2 uptake of up to 1.11 wt % at 77 K.
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H 2 uptakecompound 6Flu topologyframework structuresGCMCFunctionalized Tetracarboxylate Linkerscanonical Monte Carlogas sorption experimentsCompound 5 exhibitsCompound 5Compound 7MOFGas Sorption StudiesNew tetracarboxylate ligandsZnII ionscompound 8 exhibitsCucompounds showcrown ether functionalities77 KZn 3Na 8.PtS topology
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