Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, 100084, P.R. China.
Angew Chem Int Ed Engl. 2023 Jul 17;62(29):e202304134. doi: 10.1002/anie.202304134. Epub 2023 Jun 7.
The reduction of alkynyl-silver and phosphine-silver precursors with a weak reducing reagent Ph SiH led to the formation of a novel silver nanocluster [Ag (PPh ) (C≡CR) ] (R=4-CH OC H ), which is the largest structurally characterized cluster of clusters. This disc-shaped cluster has a Ag kernel consisting of a bicapped hexagonal prismatic Ag unit wrapped by six Ino decahedra through edge-sharing. This is the first time that Ino decahedra are used as a building block to assemble a cluster of clusters. Moreover, the central silver atom has a coordination number of 14, which is the highest in metal nanoclusters. This work provides a diverse metal packing pattern in metal nanoclusters, which is helpful for understanding metal cluster assembling mechanisms.
用弱还原剂 PhSiH 还原炔基-银和膦-银前体，得到了一种新型的银纳米团簇[Ag(PPh3)(C≡CR)]（R=4-CHOC6H4），这是结构上最大的簇状簇。这个盘形团簇具有一个由 bicapped 六边形棱柱 Ag 单元组成的 Ag 核，该单元通过边缘共享被六个 Ino icositetrahedra 包裹。这是第一次使用 Inoicositetrahedra 作为构建块来组装簇状簇。此外，中心银原子的配位数为 14，在金属纳米团簇中是最高的。这项工作为金属纳米团簇提供了多样化的金属堆积模式，有助于理解金属团簇组装机制。
