Cooperative defect tailoring: A promising protocol for exceeding performance limits of state-of-the-art MOF membranes

Ligand Defect Density Regulation in Metal–Organic Frameworks by Functional Group Engineering on Linkers

“…Metal–organic frameworks (MOFs) with periodic connection of inorganic metal nodes (also known as secondary building units, SBUs) and organic linkers are a relatively new family of porous crystalline materials, possessing great potential in multifunctional applications. − On the basis of in-depth experimental and theoretical studies, the application of MOFs heavily relies on their structural irregularities (i.e., defects). − It is reported that low-defect MOFs are favorable in gas separation, − where any short-range disordered defects would introduce additional pore structures and thereby significantly affect the selectivity or/and permeability. In contrast, the defects present a positive effect in catalytic reactions (e.g., Diels–Alder reactions, cyanosilylation, Knoevengel reaction, CO 2 cycloaddition, etc.…”

Complete twin suppression in oriented NH2-MIL-125 film via facile coordination modulation

“…3 Our recent study further indicated that maintaining preferred (111)-orientation was beneficial for improving gas separation performance of UiO-66/NH 2 -UiO-66 films due to significantly reduced density of grain boundary defects. 4…”

Titanium‐Oxo Cluster Assisted Fabrication of a Defect‐Rich Ti‐MOF Membrane Showing Versatile Gas‐Separation Performance

“…In particular, the ideal CO 2 /N 2 selectivity of the MIL-125-TG was the highest among all pristine polycrystalline MOF membranes (Figure 5j and Table S3) measured under comparable conditions. [9,20,21] It should be noted that besides the CO 2 /N 2 gas pair, MIL-125-TG membrane also exhibited excellent H 2 /N 2 and H 2 /CH 4 selectivity. In effect, many literatures have reported microporous materials with relatively large pores but enhancing H 2 /N 2 or H 2 /CH 4 separations.…”