Porous Frustrated Lewis Pairs Catalyst Constructed\non Defective Zirconium-Based Metal–Organic Frameworks for Hydrogenation\nReactions with H<sub>2</sub>

A porous\nmetal–organic framework (MOF)-based frustrated\nLewis pairs (FLPs) were prepared via a ligand replacement strategy\nto generate organic linker defects in zirconium-based MOF (MOF-808),\nthereby exposing Zr sites as Lewis acid. Due to the rigid features\nof the MOF skeleton, the unsaturated metal cluster and the adjacent\nlattice oxygen (Lewis bases) are in sterically hindered positions,\nwhich formed FLP sites with efficient H<sub>2</sub> activation ability.\nThis porous heterogeneous FLP catalyst [MOF-808-OH (15%)] exhibits\nhigh performance styrene hydrogenation to ethylbenzene with 99% yield.\nThe high structural stability and reusability enabled the catalyst\nto maintain an over 98% activity after five cycles. This work provides\na defect modulation strategy to prepare MOF-based solid FLP catalysts.