Reticular design and synthesis of porous metal-organic frameworks

8 Reticular design and synthesis of porous metal-organic frameworks 

The design and synthesis of metal-organic frameworks (MOFs) has yielded a large number of solids that possess useful gas and liquid adsorption properties. In particular, highly porous structures constructures constructed from discrete 

Crystal structure of MOF-5. (a) Z114O tetrahedra joined by benzenedicarboxylate linkers. H atoms are omitted for clarity, (b) The topology of the framework (primitive cubic net) shown as an assembly of i/iu ( )()— clusters (represented as truncated tetrahedra) andp-phenylene (-CgFLj-) links (represented by rods). From O. M. Yaghi, M. O Keeffe, N. W. Ockwig, H. K. Chae, M. Eddaoudi, and J. Kim, Nature 423, 705-14 (2003). 

An example of a porous framework that is isoreticular, but not isostructural, with MOF-5 is MOF-177, which incorporates the extended organic linker 1,3,5-benzenetribenzoate (BTB). The framework of crystalline MOF-177, Zn40(BTB)2- (DEF)i5(H20)3, where DEF = diethyl formamide, has an ordered structure with an estimated surface area of4,500 m2 g-1, which greatly exceeds those of zeolite Y (904 m2g 1) and carbon (2,030 m2 g-1). 

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, 

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