Kordan Mike Alexander, Schrenk Claudio, Schnepf Andreas
Chemistry Department, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.
Chemistry. 2024 Dec 13;30(70):e202403838. doi: 10.1002/chem.202403838. Epub 2024 Nov 16.
The ligands used for the protection of metalloid clusters heavily influence the resulting structure and shape. For silver, thiolate and alkynyl ligands are commonly used, while phosphines usually play a minor role as co-ligands. Herein, we report the synthesis and structural characterization of Ag(PEt)Cl (1), the largest structurally characterized metalloid silver cluster with phosphines and halides as sole ligands. Instead of the frequently observed spherical shape of metalloid clusters, 1's structure resembles a hexagonal prism. The highly light and temperature sensitive compound features many similarities to its smaller congener Ag(PBu)Cl, though there are distinct structural and electronic differences present. Within 1, a Ag subunit can be found, which identifies these clusters as molecular seeds for the formation of faceted nanoparticles.
用于保护类金属簇的配体对所得结构和形状有很大影响。对于银来说，硫醇盐和炔基配体是常用的，而膦通常作为共配体起次要作用。在此，我们报道了Ag(PEt)Cl（1）的合成与结构表征，它是最大的以膦和卤化物作为唯一配体的经结构表征的类金属银簇。与类金属簇常见的球形不同，1的结构类似一个六棱柱。这种对光和温度高度敏感的化合物与其较小的同系物Ag(PBu)Cl有许多相似之处，不过也存在明显的结构和电子差异。在1中，可以发现一个银亚基，这表明这些簇是形成多面体纳米颗粒的分子种子。
