Modular Synthesis of Highly Porous Zr-MOFs Assembled from Simple Building Blocks for Oxygen Storage

The
last decade has witnessed significant advances in the scale-up
synthesis of metal–organic frameworks (MOFs) using commercially
available and affordable organic linkers. However, the synthesis of
MOFs using elongated and/or multitopic linkers to access MOFs with
large pore volume and/or various topologies can often be challenging
due to multistep organic syntheses involved for linker preparation.
In this report, a modular MOF synthesis strategy is developed by utilizing
the coordination and covalent bonds formation in one-pot strategy
where monoacid-based ligands reacted to form ditopic ligands, which
then assembled into a three-dimensional MOF with Zr6 clusters.
Chemical stability of the resulting materials was significantly enhanced
through converting the imine bond into robust linkage via cycloaddition
with phenylacetylene. Oxygen storage capacities of the MOFs were measured,
and enhanced volumetric O2 uptake was observed for the
stabilized MOF, NU-401-Q.