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Proc Natl Acad Sci U S A. 2008 Aug 19;105(33):11623-7. doi: 10.1073/pnas.0804900105. Epub 2008 Aug 18.

Metal-organic frameworks with high capacity and selectivity for harmful gases.

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Department of Chemistry and Biochemistry, Center for Reticular Materials Research at California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.


Benchmarks have been established for the performance of six metal-organic frameworks (MOFs) and isoreticular MOFs (IRMOFs, which have the same underlying topology as MOF-5), MOF-5, IRMOF-3, MOF-74, MOF-177, MOF-199, and IRMOF-62, as selective adsorbents for eight harmful gases: sulfur dioxide, ammonia, chlorine, tetrahydrothiophene, benzene, dichloromethane, ethylene oxide, and carbon monoxide. Kinetic breakthrough measurements are used to determine the calculated dynamic adsorption capacity of each "benchmark" MOF for each gas. The capacity of each MOF is compared to that of a sample of Calgon BPL activated carbon. We find that pore functionality plays a dominant role in determining the dynamic adsorption performance of MOFs. MOFs featuring reactive functionality outperform BPL carbon in all but one case and exhibit high dynamic adsorption capacities up to 35% by weight.

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