Details

Autor(en) / Beteiligte

• Lei, Zhen
• Li, Jiao‐Jiao
• Wan, Xian‐Kai
• Zhang, Wen‐Han
• Wang, Quan‐Ming

Titel

Isolation and Total Structure Determination of an All‐Alkynyl‐Protected Gold Nanocluster Au144

Ist Teil von

• Angewandte Chemie International Edition, 2018-07, Vol.57 (28), p.8639-8643

Auflage

International ed. in English

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Total structure determination of a ligand‐protected gold nanocluster, Au144, has been successfully carried out. The composition of title nanocluster is Au144(C≡CAr)60 (1; Ar=2‐FC6H4‐). The cluster 1 exhibits a quasi‐spherical Russian doll‐like architecture, comprising a Au54 two‐shelled Mackay icosahedron (Au12@Au42), which is further enclosed by a Au60 anti‐Mackay icosahedral shell. The Au114 kernel is enwrapped by thirty linear ArC≡C‐Au‐C≡CAr staple motifs. The absorption spectrum of 1 shows two bands at 560 and 620 nm. This spectrum is distinctly different from that of thiolated Au144, which was predicted to have an almost identical metal kernel and very similar ligands arrangement in 1. These facts indicate the molecule‐like behavior of 1 and significant involvement of ligands in the electronic structure of 1. The cluster 1 is hitherto the largest coinage metal nanocluster with atomically precise molecular structure in the alkynyl family. The work not only addresses the concern of structural information of Au144, which had been long‐pursued, but also provides an interesting example showing ligand effects on the optical properties of ligand protected metal nanoclusters. Layer by layer: Total structure determination of a ligand‐protected gold nanocluster Au144, hitherto the largest coinage metal nanocluster in the alkynyl family, has been successfully conducted. This work not only addresses the concern of structural information of Au144, which had been long‐pursued, but also provides an interesting example of ligand effects on the optical properties of ligand‐protected metal nanoclusters.