Crystalline Order Yet Glass-Like Heat Transport Driven by Hidden Local Distortions as the Structural Origin of Ultralow Thermal Conductivity in AgErTe2来源：ACS PublicationsGiven their rich chemical diversity and the interplay among the p-, d-, and f-orbitals of chalcogens, transition metals, and lanthanides, respectively, rare-earth transition-metal chalcogenides exhibit a wide variety of structural, magnetic, and transport phenomena. As a result, they form a particularly appealing platform for investigating structure–property relationships, emergent electronic and magnetic behaviors, and therma...
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2025
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来源：ACS PublicationsRare-earth delafossites, ARCh2; A = alkali metal, R = rare-earth, Ch = chalcogen which consist of intercalated rare-earth metal dichalcogenides, host frustrated triangular lattices that are fertile ground for exotic phenomena. In most cases, the triangular rare-earth sublattice arises from R-3m (No. 166) structures with three layers of rare-earth metal dichalcogenide octahedra or P63/mmc (No. 194) structures with two such layers, analogous to those found in transition metal dichalcogenides. Substituting the alkali metal with Cu+ yields a distinct trigonal crystal symmetry─P-...
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2025
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A Trifunctional, Rare-Earth Theranostic Chelator Platform to Enable Diagnostic Nuclear Imaging, Surgical Resection, and Radiotherapy 来源：ACS PublicationsHere, we establish a single-molecule, trifunctional platform compatible with diagnostic positron emission tomography (PET), optical imaging-assisted intrasurgical resection, and chelation of radiotherapeutic rare-earth nuclides. Building on previous pyridylalkynylaryl (PEPA) antenna scaffolds, mono- and bisantenna analogs incorporating either PEPA or methoxy-substituted MEPA chromophores were prepared to assess the role of pyridylalkynylaryl nu...
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2025
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来源：ACS PublicationsDeveloping robust oxygen evolution reaction (OER) catalysts for proton exchange membrane water electrolysis (PEMWE) demands concurrent mitigation of insufficient activity and structural instability in acidic media. Herein, we propose a spin-state engineering strategy enabled by rare-earth doping to resolve the intrinsic activity-stability trade-off dilemma. Incorporation of rare-earth cations (Sm3+, Nd3+, Ho3+) into MnCo2O4.5 enhances Co–O covalency and 4f–3d coupling, increasing the crystal-field splitting and driving the Co sublattice from a purely high-spin Co2+/Mn4+ towa...
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2025
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