来源：ACS PublicationsRegioselective polymerization of isoprene enables the synthesis of polymers with well-defined microstructures, in which the ancillary ligand at the metal center plays a critical role in modulating polymerization performance. To investigate the effect of the ligand framework on polymerization reactivity, in this work, a series of guanidinate rare-earth metal bis(silylamide) complexes {(2,6-iPr2C6H3NH)[PhNC(2,6-iPr2C6H3N)]}Ln[N(SiHMe2)2]2(THF) (Ln = Sc (1), Y (2), Lu (3), Sm (4), Nd (5)), {(2,6-iPr2C6H3NH)[(2-OMe-C6H4)NC(2,6-iPr2C6H3N)]Nd[N(SiHMe2)2]2(THF) (6), and {(2,6-iPr2C...
Release time:
2026
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来源：ACS PublicationsSiloxane and aluminol surfaces, ubiquitous in Earth’s system, regulate the adsorption of economically vital elements such as rare earth elements (REEs), yet their atomic-scale reactivity remains unclear. Using in situ atomic force microscopy (AFM), we directly probed atomic-scale reactivity of siloxane and aluminum surfaces for REEs (La, Y, and Yb) on illite and gibbsite. We reveal unexpectedly higher reactivity of siloxane over aluminol surface, with marked preference for heavy-REEs (Y, Yb) over light-REEs (La) in weak-acid environments (pH = 5.5–6.0). Atomic-scale imaging ...
Release time:
2026
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来源：ACS PublicationsRare-earth-doped glasses have great potential in magneto-optical applications due to their high transparency and Verdet constant. However, their synthesis not only requires a high-temperature treatment over 1000 °C, but also involves the use of many expensive heavy rare-earth elements, which significantly increases the manufacturing cost. In this work, a desolvation method is used to synthesize a hybrid glass using a cost-effective Ce element. The use of ethanol as a solvent not only lowers the synthesis temperature down to 90 °C, but also avoids the hydrolysis of ...
Release time:
2026
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来源：ACS PublicationsStrong demand for rubber, coupled with limited natural rubber supply, has accelerated the development of synthetic alternatives. Metal-catalyzed polymerization is a key route to highly stereoregular rubber materials. Among the developed catalysts, rare-earth metal catalytic systems have attracted attention because of their relatively low toxicity, high catalytic activity, and pronounced stereoselectivity. A series of quinolyl-based pincer rare-earth chlorides was synthesized through the reactions of quinolyl-based lithium of the ligands with RECl3. The products obtained from...
Release time:
2026
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