IRMOF

Bae et al. [114] performed a study to modify Ni-DOBDC with pyridine molecules. The study showed that pyridine molecule made the normally hydrophilic internal surface more hydro-phobic as a result, water absorption was reduced, while substantial C02 capture capacity was retained to a certain level. Fracaroli et al. [132] improved the interior of IRMOF-74TII by covalently functionalizing it with a primary amine, and used a MOF, IRMOF-74-IIICH2NFI2, for the selective capture of C02 in 65% relative humidity. 

IRMOF-m Isoreticular MOF (with n an integer referring to a member of the series). 

Figure 9.43 Single crystal X-ray structures of IRMOF-n (n = 1 — 7,8,10,12,14, and 16), labelled respectively. MOF-5 is re-designated IRMOF-1 as part of this series. IRMOFs 9,11,13, and 15 are doubly interpenetrated. Zn (II) tetrahedral shown as polyhedra. The large spheres represent the largest van der Waals spheres that fit in the cavities without touching the frameworks (reprinted from [47] with permission from AAAS).

Figure 7.3 Single-crystal X-ray structures of IRMOF-n (n — 1-8, 10, 12, 14, and 16). All the hydrogen atoms have been omitted, and only one orientation of the disordered atoms is shown for clarity.74 (Reprinted with permission from M. Eddaoudi et al., Science 2002, 295, 469-472. Copyright AAAS.)...

Comparison of cubic fragments in the respective three-dimensional extended structures of IRMOF-1 (= MOF-5), IRMOF-6, IRMOF-8, IRMOF-11, and IRMOF-16. From M. Eddaoudi, J. Kim, N. Rosi, D. Vodak, J. Wachter,... 

The isoreticular MOFs based on the Zn40(C0i)6 SBU also possesses favorable sorption properties for the storage of molecular hydrogen. At 77 K, microgravimetric sorption measurements gave H2 (mg/g) values of 13.2,15.0, 16.0, and 12.5 for IRMOF-1, IRMOF-8, IRMOF-11, and MOF-177, respectively. At the highest pressures attained in the measurements, the maximum uptake values for these frameworks are 5.0, 6.9, 9.3, and 7.1 molecules of H2 per Zn4OI unit where L stands for a linear dicarboxylate. 

In other similar structures, such as IRMOF-6 and IRMOF-8, the specific hydrogen uptake is approximately doubled and quadrupled, respectively, compared to MOF-5 at room temperature and 2.0MPa pressure [244], The hydrogen absorption capacity of these structures at room temperature is comparable to that of carbon nanotubes at cryogenic temperatures and can be fine-tuned by modifying the porosity of the structure with suitable linkers [244],... 

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