Abstract
A new anionic metal-organic framework, {[H3O]2[Zn4(μ4-O)(NSBPDC)4]·16(H2O)]}n (1), was synthesized under solvothermal conditions using a predesigned multifunctional dicarboxylic acid (H2NSBPDC = 6-nitro-2,2′-sulfone-4,4′-dicarboxylic acid). Complex 1 contains 4-connected tetrahedral [Zn4(μ4-O)(CO2)8] clusters, which are further linked by the bridging ligands, generating a threefold interpenetrated diamond-like network with ultra-microporous channels. Gas adsorption studies reveal that 1 has good adsorption selectivity for CO2 over CH4 and N2. In addition, 1 can serve as a host to incorporate lanthanide cations via a targeted ion-exchanged process. Notably, the structure of 1 can be dehydrated and rehydrated reversibly.
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