Homoleptic Alkynyl‐Protected Gold Nanoclusters: Au44(PhC≡C)28 and Au36(PhC≡C)24

For the first time total structure determination of homoleptic alkynyl‐protected gold nanoclusters is reported. The nanoclusters are synthesized by direct reduction of PhC≡CAu, to give Au44(PhC≡C)28 and Au36(PhC≡C)24. The Au44 and Au36 nanoclusters have fcc‐type Au36 and Au28 kernels, respectively,...

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Published inAngewandte Chemie International Edition Vol. 56; no. 38; pp. 11494 - 11497
Main Authors Wan, Xian‐Kai, Guan, Zong‐Jie, Wang, Quan‐Ming
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 11.09.2017
EditionInternational ed. in English
Subjects
alkynyl ligands
cluster compounds
Direct reduction
Gold
Kernels
Nanoclusters
nanostructures
optical properties
Staples
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Summary:For the first time total structure determination of homoleptic alkynyl‐protected gold nanoclusters is reported. The nanoclusters are synthesized by direct reduction of PhC≡CAu, to give Au44(PhC≡C)28 and Au36(PhC≡C)24. The Au44 and Au36 nanoclusters have fcc‐type Au36 and Au28 kernels, respectively, as well as surrounding PhC≡C‐Au‐C2(Ph)Au‐C≡CPh dimeric “staples” and simple PhC≡C bridges. The structures of Au44(PhC≡C)28 and Au36(PhC≡C)24 are similar to Au44(SR)28 and Au36(SR)24, but the UV/Vis spectra are different. The protecting ligands influence the electronic structures of nanoclusters significantly. The synthesis of these two alkynyl‐protected gold nanoclusters indicates that a series of gold nanoclusters in the general formula Aux(RC≡C)y as counterparts to Aux(SR)y can be expected. All alkynyl: The structure determinations of Au44(PhC≡C)28 and Au36(PhC≡C)24 are the first of homoleptic alkynyl‐protected gold nanoclusters. The structures are similar to those of Au44(SR)28 and Au36(SR)24, respectively, but the UV/Vis spectra are distinctly different.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201706021