To move nuclear as a primary energy source, uranium resources must be secured beyond what terrestrial reserves can provide. Given the vast quantity of uranium naturally found in the ocean, adsorbent materials have been investigated to recover this vital fuel source. Amidoxime (AO) has been found to be the state-of-theart functional group for this purpose, however, improvements must still be made to overcome the issues with selectively capturing uranium at such a low concentration found in the ocean. Herein, we report PAF-1 as a platform to study the effects of two amidoxime ligands. The synthesized adsorbents, PAF-1-CH 2 NHAO and PAF-1-NH(CH 2 ) 2 AO, with varying chain lengths and grafting degrees, were investigated for their uranium uptakes and kinetic efficiency. PAF-1-NH(CH 2 ) 2 AO was found to outperform PAF-1-CH 2 NHAO, with a maximum uptake capacity of 385 mg/g and able to reduce a uranium-spiked solution to ppb level within 10 min. Further studies with PAF-1-NH(CH 2 ) 2 AO demonstrated effective elution for multiple adsorption cycles and showed promising results for uranium recovery in the diverse composition of a spiked seawater solution. The work presented here moves forward design principles for amidoxime-functionalized ligands and provides scope for strategies to enhance the capture of uranium as a sustainable nuclear fuel source.

To offset the environmental impact of platinumgroup element (PGE) mining, recycling techniques are being explored. Porous organic polymers (POPs) have shown significant promise owing to their selectivity and ability to withstand harsh conditions. A series of pyridine-based POP nanotraps, POPPy , POP-pNH 2-Py, and POP-oNH 2-Py, have been designed and systematically explored for the capture of palladium, one of the most utilized PGEs. All of the POP nanotraps demonstrated record uptakes and rapid capture, with the amino group shown to be vital in improving performance. Further testing on the POP nanotrap regeneration and selectivity found that POP-oNH 2-Py outperformed POP-pNH 2-Py. Single-crystal X-ray analysis indicated that POP-oNH 2-Py provided a stronger complex compared to POP-pNH 2-Py owing to the intramolecular hydrogen bonding between the amino group and coordinated chlorine molecules. These results demonstrate how slight modifications to adsorbents can maximize their performance. Platinum-group elements (PGEs) are recognized for their unique properties such as corrosion resistance, high melting point, and catalytic qualities. These features have made them economically invaluable, with widespread use in a variety of industrial sectors. Elements in this category, namely platinum, palladium, rhodium, ruthenium, iridium, and osmium, are

To offset the environmental impact of platinumgroup element (PGE) mining, recycling techniques are being explored. Porous organic polymers (POPs) have shown significant promise owing to their selectivity and ability to withstand harsh conditions. A series of pyridine-based POP nanotraps, POPPy , POP-pNH 2-Py, and POP-oNH 2-Py, have been designed and systematically explored for the capture of palladium, one of the most utilized PGEs. All of the POP nanotraps demonstrated record uptakes and rapid capture, with the amino group shown to be vital in improving performance. Further testing on the POP nanotrap regeneration and selectivity found that POP-oNH 2-Py outperformed POP-pNH 2-Py. Single-crystal X-ray analysis indicated that POP-oNH 2-Py provided a stronger complex compared to POP-pNH 2-Py owing to the intramolecular hydrogen bonding between the amino group and coordinated chlorine molecules. These results demonstrate how slight modifications to adsorbents can maximize their performance. Platinum-group elements (PGEs) are recognized for their unique properties such as corrosion resistance, high melting point, and catalytic qualities. These features have made them economically invaluable, with widespread use in a variety of industrial sectors. Elements in this category, namely platinum, palladium, rhodium, ruthenium, iridium, and osmium, are

Through a systematic investigation … … of pyridine-based porous organic polymers, structural modifications of the monomer unit were found to create a nanotrap selectively capturing palladium in solution, as reported by Q. Sun, S. Ma, and co-workers in their Communication on page 19618. By creating a stronger complex with palladium through intramolecular hydrogen bonding, this vital element could be extracted through recycling plants and waste streams.

… von Pyridin-basierten porçsen organischen Polymeren ergab, dass Strukturmodifikationen der Monomereinheit eine Nanofalle für den selektiven Einfang von Platin in Lçsung erzeugen. Wie Q. Sun, S. Ma und Mitarbeiter in ihrem Forschungsartikel auf S. 19786 berichten, bildet die Falle einen starken Komplex mit Palladium über intramolekulare Wasserstoffbrücken, was die Palladiumextraktion in Recyclinganlagen und aus Abwässern ermçglicht.