A Flexible Phosphonate Metal-Organic Framework for Enhanced Cooperative Ammonia Capture.

Ammonia (NH) production in 2023 reached 150 million tons and is associated with potential concomitant production of up to 500 million tons of CO each year. Efforts to produce green NH are compromised since it is difficult to separate using conventional condensation chillers, but in situ separation with minimal cooling is challenging. While metal-organic framework materials offer some potential, they are often unstable and decompose in the presence of caustic and corrosive NH.

Trace benzene capture by decoration of structural defects in metal-organic framework materials.

Capture of trace benzene is an important and challenging task. Metal-organic framework materials are promising sorbents for a variety of gases, but their limited capacity towards benzene at low concentration remains unresolved. Here we report the adsorption of trace benzene by decorating a structural defect in MIL-125-defect with single-atom metal centres to afford MIL-125-X (X = Mn, Fe, Co, Ni, Cu, Zn; MIL-125, TiO(OH)(BDC) where HBDC is 1,4-benzenedicarboxylic acid).

High adsorption of ammonia in a titanium-based metal-organic framework.

We report the high adsorption of NH in a titanium-based metal-organic framework, MFM-300(Ti), comprising extended [TiO] chains linked by biphenyl-3,3',5,5'-tetracarboxylate ligands. At 273 K and 1 bar, MFM-300(Ti) shows an exceptional NH uptake of 23.4 mmol g with a record-high packing density of 0.

Exceptional capture of methane at low pressure by an iron-based metal-organic framework.

The selective capture of methane (CH) at low concentrations and its separation from N are extremely challenging owing to the weak host-guest interactions between CH molecules and any sorbent material. Here, we report the exceptional adsorption of CH at low pressure and the efficient separation of CH/N by MFM-300(Fe). MFM-300(Fe) shows a very high uptake for CH of 0.

Highly Efficient Proton Conduction in the Metal-Organic Framework Material MFM-300(Cr)·SO(HO).

The development of materials showing rapid proton conduction with a low activation energy and stable performance over a wide temperature range is an important and challenging line of research. Here, we report confinement of sulfuric acid within porous MFM-300(Cr) to give MFM-300(Cr)·SO(HO), which exhibits a record-low activation energy of 0.04 eV, resulting in stable proton conductivity between 25 and 80 °C of >10 S cm.

Lowland tapir distribution and habitat loss in South America.

The development of species distribution models (SDMs) can help conservation efforts by generating potential distributions and identifying areas of high environmental suitability for protection. Our study presents a distribution and habitat map for lowland tapir in South America. We also describe the potential habitat suitability of various geographical regions and habitat loss, inside and outside of protected areas network.