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[摘要]：Synthesis, structure, and gas adsorption properties of three Metal Organic Frameworks (MOFs) synthesized from predesigned ligands 4-(1H-tetrazole-5-yl)benzoic acid (4-TBA) and 2-fluoro-4-(1H-tetrazole-5-yl)benzoic acid (2F-4-TBA) along with Cu(II) as an metal precursor has been reported. Among these MOFs, Cu(9)(4-TBA)(10)(C(2)H(5)OH)(2) (Cu-TBA-1) and Cu(2)(4-TBA)(2)(DMF)(C(2)H(5)OH) (Cu-TBA-2) are structural isomers. Whereas, Cu(2)(4-TBA)(2)(DMF)(C(2)H(5)OH) (Cu-TBA-2) and Cu(2)(2-F-4-TBA)(2)(DMF)(2) (Cu-TBA-2F) have similar crystal structure. N(2) adsorption isotherms of the activated sample of Cu-TBA-1 and -2 exhibit types-I sorption behavior with a Langmuir and Brunauer-Emmett-Teller (BET) surface area of 686, 402 m(2)/g and 616, 356 m(2)/g, respectively. It is noteworthy that Cu-TBA-1 and -2 adsorbs 1.16 and, 1.54 wt % H(2), while Cu-TBA-2F adsorbs 0.67 wt % at 77 K and 1 atm. On the other hand, Cu-TBA-1 and -2 adsorb 3.08 and 2.54 mmol/g, while Cu-TBA-2F adsorbs 1.27 mmol/g of CO(2) at 298 K and 1 bar pressure. H(2) adsorption sites in Cu-TBA-2 and -2F have been analyzed by molecular simulation. |
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