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Per‐ and polyfluoroalkyl substances (PFAS) are a group of recalcitrant molecules that have been used since the 1940s in a variety of applications. They are now linked to a host of negative health outcomes and are extremely resistant to degradation under environmental conditions. Currently, membrane technologies or adsorbents are used to remediate contaminated water. These techniques are either inefficient at capturing smaller PFAS molecules, have high energy demands, or result in concentrated waste that must be incinerated at high temperatures. This Review focuses on what role metal‐organic frameworks (MOFs) may play in addressing the PFAS problem. Specifically, how the unique properties of MOFs such as their well‐defined pore sizes, ultra‐high internal surface area, and tunable surface chemistry may be a sustainable solution for PFAS contamination. [ABSTRACT FROM AUTHOR]

Non‐porous small molecule adsorbents such as {[3,5‐(CF3)2Pz]Cu}3 (where Pz=pyrazolate) are an emerging class of materials that display attractive features for ethene−ethane separation. This work examines the chemistry of fluorinated copper(I) pyrazolates {[3,5‐(CF3)2Pz]Cu}3 and {[4‐Br‐3,5‐(CF3)2Pz]Cu}3 with much larger 1‐butene in both solution and solid state, and reports the isolation of rare 1‐butene complexes of copper(I), {[3,5‐(CF3)2Pz]Cu(H2C=CHC2H5)}2 and {[4‐Br‐3,5‐(CF3)2Pz]Cu(H2C=CHC2H5)}2 and their structural, spectroscopic, and computational data. The copper−butene adduct formation in solution involves olefin‐induced structural transformation of trinuclear copper(I) pyrazolates to dinuclear mixed‐ligand systems. Remarkably, larger 1‐butene is able to penetrate the dense solid material and to coordinate with copper(I) ions at high molar occupancy. A comparison to analogous ethene and propene complexes of copper(I) is also provided. [ABSTRACT FROM AUTHOR]

Keywords: adsorption; metal-organic frameworks; photocatalysis; remediation; sensors EN adsorption metal-organic frameworks photocatalysis remediation sensors 1 1 1 10/13/22 20221010 NES 221010 B The Cover Feature b shows an enzyme encapsulated with a metal-organic framework (MOF) degrading a perfluoroalkyl and polyfluoroalkyl substance (PFAS). Cover Feature: Towards Solving the PFAS Problem: The Potential Role of Metal-Organic Frameworks (ChemSusChem 19/2022) Adsorption, metal-organic frameworks, photocatalysis, remediation, sensors. [Extracted from the article]

Cover Feature: Isolable 1-Butene Copper(I) Complexes and 1-Butene/Butane Separation Using Structurally Adaptable Copper Pyrazolates (3/2021) Adsorption, alkene ligands, butene, copper, separation Keywords: adsorption; alkene ligands; butene; copper; separation EN adsorption alkene ligands butene copper separation 349 349 1 03/29/21 20210301 NES 210301 B The Cover Feature b shows that 1-butene molecules can penetrate into a dense crystalline solid and drive the transformation of planar trinuclear fluorinated copper(I) pyrazolate complexes toward boat-shaped, dinuclear copper-butene adducts. [Extracted from the article]