Crystal Engineering of a Microporous, Catalytically Active fcu Topology MOF Using a Custom-Designed Metalloporphyrin Linker

A 12‐connected fcu metal–organic framework (MOF), MMPF‐3, has been prepared using a CoII metalloporphyrin. MMPF‐3 is comprised of the same polyhedral supermolecular building blocks as the prototypal fcu‐MOF, fcu‐MOF‐1, and its nanoscale cavities feature 18 catalytically active cobalt centers. The high density (ca. 5 cobalt sites/nm3) affords MMPF‐3 superior performance in catalytic epoxidation of trans‐stilbene compared to other MOFs.