Introduction to Metal-Organic Frameworks MOFs

Adapted with permission from ref. 7. Copyright 2012 American Chemical Society. 

Pillar[5]arenes can rotate freely around every terphenylene linker, which results in the disorder within P5A-MOF-1 itself. On the other hand, the random distribution of enantiomeric pillar[5]arenes corresponding to their planar chirality also contributes to the disorder. Therefore, singlecrystal X-ray data is unable to discern the solid structure of P5A-MOF-1 as the extended framework. Non-interpenetrated IRMOF-16, incorporated with pillar[5]arenes with randomly distributed chirality and orientations around 

Further experiments have been carried out to investigate the ability of P5A-MOF-1 to take up guests. First of all, the association constants (/Ta) of the strut 1 with three guests, e.g., N-hejylpyridinium cation (Gl ), N,N -dihexyl-4,4-bipyridinium dication (G2 ), and the neutral 1,4-dinitrobenzene (G3), were determined by NMR titrations in CD3COCD3. They are 43.2 2.9 (Gl ), 170 50 (G2 ), and 66.2 1.9 (G3), respectively. Second, the 

Many examples of homochiral MOFs, with either stereogenic centers or axes of chirality, have been reported. In this field, the incorporation of planar chirality into homochiral MOFs is a relatively unexplored area. Stoddart et al. 

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