期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 38, 页码 14997-15002出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b07854
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- Ontario government
- Mitacs JSPS
- Academy of Finland
- VaisalH Foundation
- Elements Strategy Initiative for Catalysts & Batteries (ESICB)
- Nanotechnology Platform from Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [12024046]
- Japan Society for the Promotion of Science (JSPS) [17H01182]
Gold superatom nanoclusters stabilized entirely by N-heterocyclic carbenes (NHCs) and halides are reported. The reduction of well-defined NHC-Au-Cl complexes produces clusters comprised of an icosahedral Au-13 core surrounded by a symmetrical arrangement of nine NHCs and three chlorides. X-ray crystallography shows that the clusters are characterized by multiple CH-pi and pi-pi interactions, which rigidify the ligand and likely contribute to the exceptionally high photoluminescent quantum yields observed, up to 16.0%, which is significantly greater than that of the most luminescent ligand-protected Au-13 superatom cluster. Density functional theory analysis suggests that clusters are 8-electron superatoms with a wide HOMO-LUMO energy gap of 2 eV. Consistent with this, the clusters have high stability relative to phosphine stabilized clusters.
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