Shen Hui, Mizuta Tsutomu
Department of Chemistry, Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-hiroshima, 739-8526, Japan.
Chem Asian J. 2017 Nov 16;12(22):2904-2907. doi: 10.1002/asia.201701337. Epub 2017 Oct 25.
The synthesis and structure determination of an alkynyl-protected Pt-doped Ag superatom nanocluster, PtAg (C≡CC H CH ) (1), are reported. The metallic core of this cluster can be viewed as a concentric three-shell Russian doll comprising Pt@Ag @Ag , in which the missing icosidodecahedral Ag shell and a new structural unit, M , have been observed. On the surface of 1, 28 alkynyl groups and 4 SbF anions were found co-protecting it. The protective role of SbF in nanoclusters is unprecedented. Moreover, of the 28 alkynyl ligands, 12 are connected not only with the outermost Ag shell, but also the inner Ag shell through the twelve pentagonal faces of the outermost icosidodecahedral Ag shell. Overall, by determining the crystal structure of 1, we discovered the missing icosidodecahedral Ag shell and the protective effect of SbF anions and demonstrated a novel M structural unit and the unique penetrability of pentagonal faces.
报道了一种炔基保护的掺铂银超原子纳米团簇PtAg(C≡CCH₂CH₃)₃₀₂ (1)的合成与结构测定。该团簇的金属核可看作是一个由Pt@Ag₁₃@Ag₁₂构成的同心三壳俄罗斯套娃，其中观察到缺失的icosidodecahedral银壳层和一个新的结构单元M₂。在1的表面，发现28个炔基和4个SbF₆⁻阴离子共同保护着它。SbF₆⁻在纳米团簇中的保护作用是前所未有的。此外，在28个炔基配体中，有12个不仅与最外层的银壳相连，还通过最外层icosidodecahedral银壳的十二个五边形面与内层银壳相连。总体而言，通过确定1的晶体结构，我们发现了缺失的icosidodecahedral银壳层以及SbF₆⁻阴离子的保护作用，并展示了一种新型的M₂结构单元和五边形面的独特穿透性。
Zotero 插件