M-MOF-74 series

This selectivity results from the UMCs (iron or copper) located in the active sites of metalloproteins. Similarly, the UMCs, especially unsaturated iron centers, will significantly facilitate this process in MOFs as well. The M-MOF-74 series are renowned for their high density of UMCs, and Fe-MOF-74 was reported as an efficient adsorbent for O2 storage and O2/N2 separation owing to the existence of unsaturated Fe(II) centers. This MOF was synthesized by air-free procedures, and it has a BET surface area of 1360m -g . After a full activation, Fe-MOF-74 [also known as Fe2(dobdc)] preferentially binds O2 over N2 at all temperatures. 

To investigate the role of OMSs in methane adsorption and the influence of the speciflc metal on the properties of the materials, in 2009, Zhou and coworkers studied methane adsorption in a series of MMOF-74 materials (M = Mg, Mn, Co, Ni, Zn), one of the most well-studied families of MOFs bearing the highest concentration of OMSs reported so far. ZnMOF-74 was... 

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