LAUSR

In a recent issue of Chem, Towsif Abtab et al. describe a Cr3+-based metal-organic framework (MOF) that can capture a record-shattering 200% of its weight in water. Remarkably, whereas the Fe3+ and Al3+ variants of the framework collapse upon water exposure, the Cr3+ version shows no decline in crystallinity or capacity after 100 cycles of water uptake. Synthesized via a cation exchange process of Cr2+ for Fe3+, the achievement of the highly porous Cr3+ structure points the way toward additional MOF topologies with exceptional stability enabled by inert metals.