Interestingly, the best material in terms of the process performance is also a small-pore MOF, according to Figure . In general, out of the shortlisted MOFs, only 4 belong to the small-pore group shown in Figure as blue symbols. The best material, hjm+N387+E44, has LCD of 4.5 Å and PLD of 2.7 Å, comparable to CALF-20. In Figure we show molecular structure of