A Metal–Organic Framework with a Hierarchical System of Pores and Tetrahedral Building Blocks

The whole is greater than the sum of its parts: Linking the porous tetrahedra of IRMOP-51 (brown) by connecting their iron-trimer vertices (red) with bipyridine linkers leads to the new metal–organic framework MOF-500, which contains additional smaller (blue) and larger (green and yellow spheres) tetrahedral pores. The sorption capacity of MOF-500 is four times greater than that of the molecular compound IRMOP-51. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2006/z600175ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.