(606g) Zr Metal–Organic Framework As a Catalyst Support for Solid Acid Catalyzed C-C Bond Isomerization and Disporportionation
We report on the use of Keggin polyoxometalate (POM) encapsulated within a stable Zr-based metalâorganic framework (MOF), NU-1000, as a catalyst for o-xylene isomerization and disproportionation. Extended X-ray absorption fine structure (EXAFS), 31P NMR, N2 physisorption, and XRD show that the catalyst is stable under the reaction condition. Initial rates over the MOF-supported catalyst were comparable to a control WOx-ZrO2, however the NU-1000 supported catalyst was unusually active toward the transmethylation pathway that requires two adjacent active sites within a pore, as created when POM is confined in the support. This work shows the promise of metalâorganic framework topologies in giving access to unique activity and selectivity, even for aggressive reactions such as hydrocarbon skeletal isomerization.