来源：ACS PublicationsChain dynamics govern the intricate behaviors of proteins, underpinning functions such as catalysis, recognition, and stimulus response, and are an increasingly appreciated aspect of structure–function relationships. Analogously, manipulating chain dynamics and structure in abiotic polymers via sequence control is an exciting, yet underexplored, strategy for improving material functions. Here, we report a systematic study relating the sequence of polymeric sequestrants to their structure and dynamics, as well as to their binding affinity and selectivity for model substrates,...
Release time:
2026
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05
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来源：ACS PublicationsRare earth elements (REEs) are emerging contaminants with escalating environmental releases. However, REE health risk assessment faces critical challenges due to inconsistent cytotoxicity benchmarks and complex multielement exposures. Here, we developed a comprehensive framework to systematically assess the cytotoxic risks of 16 rare earth ions (REIs). The framework integrates single and binary exposures of 16 REIs across eight human cell lines, machine learning models, and population exposure scenario predictions. The high-throughput screening of single exposure on three en...
Release time:
2026
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05
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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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05
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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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