来源：ACS PublicationsA catecholate proligand, 2,3–dihydroxy–4,6–di–tert–butyl–benzaldehyde ([trenHC═N(H2tBu2cat)3]), capable of binding two metal cations, and its complexes RE2[trenHC═N(tBu2cat)3], RE = La, Nd, and Dy were synthesized. X-ray structures of the complexes showed that C–O bond lengths, ranging from 1.317(4) to 1.334(3) Å, and C–C bond lengths, ranging from 1.426(3) to 1.443(3) Å, of the complexes were consistent with the catecholate form of the ligand in all cases. Cyclic voltammetry (CV) measurements revealed the oxidation of the catecholate ligand arms to the semiquinona...
Release time:
2026
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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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05
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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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