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A practical electrochemical method for the synthesis of β‐hydroxyselenides has been developed under an external oxidant‐free condition at room temperature under air from alkenes with diselenides and H2O. A radical mechanism is proposed for this transformation and the gram‐scale reactions demonstrate the practicability of this reaction. [ABSTRACT FROM AUTHOR]

In recent years, a variety of adsorbents have been developed for Hg2+ removal. However, these adsorbents are unsatisfactory for adsorption due to narrow and irregular pore channels or poor adsorption capacity and low stability. Therefore, it is worth exploring a porous Hg2+ adsorbent material with high adsorption performance and stability. In this study, a benzothiadiazole-based nonbranching functionalized covalent organic framework (COF) material (TPS-COF) by one-step synthesis was reported, which exhibited a high specific surface area of 1564 m2 g−1, high crystallinity and stability attributed to its high conjugated linkage structure of benzothiadiazole. In addition, due to the rich S and N elements of the benzothiadiazole unit, it exhibited excellent adsorption performance on Hg2+, including excellent adsorption amount (1040 mg g−1), high initial adsorption rate (448 mg g−1 min−1) and very short adsorption equilibrium time (10 min), with an efficient removal rate of Hg2+ in the pH range of 2–8. After desorption, the TPS-COF still retained good pore stability, adsorption capacity, and reusability. Such a one-step synthetic unbranched functionalization strategy provides further insights to achieve a good balance between the high crystallinity, functionality and stability of COFs. [ABSTRACT FROM AUTHOR]

With the advantages of facile one-pot synthesis and THF-irrigating purification, we first developed novel cyclic compounds with deep blue thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) dual emission even in the as-spun films. Careful crystal analysis, combined with theoretical calculations, reveal that abundant inter- and intra-molecular interactions, whatsoever the molecular packing, are obligated to unique RTP properties. These results open up a new study of compounds with multiple acceptors and donors, and represent an important step in the further development of deep blue TADF and easy RTP emission. [ABSTRACT FROM AUTHOR]

In recent years, a variety of adsorbents have been developed for Hg2+ removal. However, these adsorbents are unsatisfactory for adsorption due to narrow and irregular pore channels or poor adsorption capacity and low stability. Therefore, it is worth exploring a porous Hg2+ adsorbent material with high adsorption performance and stability. In this study, a benzothiadiazole-based nonbranching functionalized covalent organic framework (COF) material (TPS-COF) by one-step synthesis was reported, which exhibited a high specific surface area of 1564 m2 g−1, high crystallinity and stability attributed to its high conjugated linkage structure of benzothiadiazole. In addition, due to the rich S and N elements of the benzothiadiazole unit, it exhibited excellent adsorption performance on Hg2+, including excellent adsorption amount (1040 mg g−1), high initial adsorption rate (448 mg g−1 min−1) and very short adsorption equilibrium time (10 min), with an efficient removal rate of Hg2+ in the pH range of 2–8. After desorption, the TPS-COF still retained good pore stability, adsorption capacity, and reusability. Such a one-step synthetic unbranched functionalization strategy provides further insights to achieve a good balance between the high crystallinity, functionality and stability of COFs. [ABSTRACT FROM AUTHOR]

Selective removal of Ca 2+ and Mg 2+ ions using the 001 × 7 resin and Fe 3+ and Al 3+ ions using the S957 resin is able to achieve the deep purification of the phosphoric acid-nitric acid solution, but the adsorption behaviors of Fe 3+ and Al 3+ ions are seriously suppressed by phosphoric acid. In order to understand the interaction mechanism of separation processes and the influence of phosphoric acid, we first studied the bonding form of Ca 2+ , Mg 2+ , Fe 3+ , and Al 3+ ions on 001 × 7 and S957 resins using FT-IR and XPS techniques; subsequently, quantum chemistry computation was carried out to further explore the bonding mechanism between the functional groups on resins and metal ions. FT-IR and XPS results reveal that for the adsorption process on the 001 × 7 resin, hydroxyls from sulfonic acid groups combine with Ca 2+ and Mg 2+ ions. Whereas Fe 3+ and Al 3+ ions are adsorbed on the S957 resin through an exchange reaction with hydroxyls on the phosphonic acid group but not on the sulfonic acid group. Quantum chemistry computation results reveal that the phosphonic acid group has a larger binding energy with Fe 3+ and Al 3+ ions. Thus, the S957 resin still presents great adsorption performance for Fe 3+ and Al 3+ ions despite the influence of dihydrogen phosphate ions in the phosphoric acid-nitric acid solution., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)

In recent years, a variety of adsorbents have been developed for Hg 2+ removal. However, these adsorbents are unsatisfactory for adsorption due to narrow and irregular pore channels or poor adsorption capacity and low stability. Therefore, it is worth exploring a porous Hg 2+ adsorbent material with high adsorption performance and stability. In this study, a benzothiadiazole-based nonbranching functionalized covalent organic framework (COF) material (TPS-COF) by one-step synthesis was reported, which exhibited a high specific surface area of 1564 m 2 g -1 , high crystallinity and stability attributed to its high conjugated linkage structure of benzothiadiazole. In addition, due to the rich S and N elements of the benzothiadiazole unit, it exhibited excellent adsorption performance on Hg 2+ , including excellent adsorption amount (1040 mg g -1 ), high initial adsorption rate (448 mg g -1 min -1 ) and very short adsorption equilibrium time (10 min), with an efficient removal rate of Hg 2+ in the pH range of 2-8. After desorption, the TPS-COF still retained good pore stability, adsorption capacity, and reusability. Such a one-step synthetic unbranched functionalization strategy provides further insights to achieve a good balance between the high crystallinity, functionality and stability of COFs.