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Isolation and Total Structure Determination of an All‐Alkynyl‐Protected Gold Nanocluster Au144.
- Source :
- Angewandte Chemie International Edition; 7/9/2018, Vol. 57 Issue 28, p8639-8643, 5p
- Publication Year :
- 2018
-
Abstract
- Abstract: Total structure determination of a ligand‐protected gold nanocluster, Au<subscript>144</subscript>, has been successfully carried out. The composition of title nanocluster is Au<subscript>144</subscript>(C≡CAr)<subscript>60</subscript> (1; Ar=2‐FC<subscript>6</subscript>H<subscript>4</subscript>‐). The cluster 1 exhibits a quasi‐spherical Russian doll‐like architecture, comprising a Au<subscript>54</subscript> two‐shelled Mackay icosahedron (Au<subscript>12</subscript>@Au<subscript>42</subscript>), which is further enclosed by a Au<subscript>60</subscript> anti‐Mackay icosahedral shell. The Au<subscript>114</subscript> 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 Au<subscript>144</subscript>, 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 Au<subscript>144</subscript>, which had been long‐pursued, but also provides an interesting example showing ligand effects on the optical properties of ligand protected metal nanoclusters. [ABSTRACT FROM AUTHOR]
- Subjects :
- GOLD clusters
LIGANDS (Chemistry)
ELECTRONIC structure
NANOSTRUCTURES
ABSORPTION
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 57
- Issue :
- 28
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 130525280
- Full Text :
- https://doi.org/10.1002/anie.201804481