Paper: Large Free Volume in Maximally Interpenetrating Networks:  The Role of Secondary Building Units Exemplified by Tb2(ADB)3[(CH3)2SO]4·16[(CH3)2SO]1

Authors: T. M. Reineke, M. Eddaoudi, D. Moler, M. O'Keeffe, and O. M. Yaghi

Citation: J. Am. Chem. Soc.2000122, 4843-4844

DOI: 10.1021/ja000363z

Abstract: The rapid growth in the area of metal-organic frameworks (MOFs) continues to provide open structures with interesting compositions, architectures and properties. However, this progress, although significant, has not witnessed many discussions on the relationship between porosity and interpenetration of open frameworks; a topic addressed here. We have recently used a synthetic strategy utilizing secondary building units (SBUs) for achieving stable, highly porous, and functionalized open networks. Here, the extended 3-D framework of crystalline MOF-9, Tb2(ADB)3[(CH3)2SO]4·16[(CH3)2SO], illustrates another aspect of SBUs:  namely, their ability to support the existence of large free volume in interpenetrating structures, which thus far have had the propensity to form assemblies containing very little or no free volume.