Clusters have proven useful models to elucidate the correlation between macroscopic properties and microstructures. However, the actinide clusters still remain much less developed compared to the splendid and systematic works of other members of this family. Here we show the synthesis of a tetra-shell mixed-metal cluster [ThO 8 @Th 12 (OH) 24 @Ni 6 (H 2 O) 18 @(sba) 12 ] (IHEP-25, H 2 sba: 2-sulfobenzoic acid) with the strategic introduction of competitive Ni 2+ ions. A cluster-based framework (IHEP-28), featuring a 2D honeycomb network and demonstrating excellent stability, has been constructed through the multistage assembly of IHEP-25, facilitated by the introduction of cationic cluster [Na 4 (OH) 3 (H 2 O) 3 ] + . IHEP-28 acts as a highly effective visible light-driven photocatalyst for CO 2 reduction. This study demonstrates that the incorporation of heterometal ions not only alters the hydrolysis patterns of actinide metal ions, resulting in the formation of new actinide clusters, but also broadens their potential applications.
Ma Jingqi,Yang Junpu,Lu Huangjie,Xu Tingrui,Hou Huiliang,Scalia Raffaele,Lin Jian
Understanding the fundamental properties of actinide-based materials is pivotal in unlocking new solutions for challenges in nuclear waste management. In this work, we showcase a novel thorium cluster ( Th-npc ) that exhibits an extremely rare Th–N bond capping the square antiprismatic Th 4+ metal center. Remarkably, Th-npc exhibits both photochromic and radiochromic behaviors under UV and X-ray radiation, respectively, allowing for distinct, measurable colorimetric shifts that facilitate a red-green-blue (RGB) radiation dosimetry method. The integration of Th-npc with a custom-built optoelectronic device enables on-site radiation dosimetry, offering the advantages of simple operation and rapid data acquisition. Additionally, this work pioneers the application of actinide materials in photothermal conversion, opening new avenues for the strategic utilization of thorium-based compounds.
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