Affiliation:
1. Department of Chemistry Tsinghua University 100084 Beijing P. R. China
2. Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials College of Chemistry Fuzhou University 350108 Fuzhou P. R. China
3. Research Center for Computational Science Institute for Molecular Science 444-8585 Myodaiji, Okazaki, Aichi Japan
Abstract
AbstractA ‘passivated precursor’ approach is developed for the efficient synthesis and isolation of all‐alkynyl‐protected gold nanoclusters. Direct reduction of dpa‐passivated precursor Au‐dpa (Hdpa=2,2’‐dipyridylamine) in one‐pot under ambient conditions gives a series of clusters including Au22(C≡CR)18 (R=−C6H4−2−F), Au36(C≡CR)24, Au44(C≡CR)28, Au130(C≡CR)50, and Au144(C≡CR)60. These clusters can be well separated via column chromatography. The overall isolation yield of this series of clusters is 40 % (based on gold), which is much improved in comparison with previous approaches. It is notable that the molecular structure of the giant cluster Au130(C≡CR)50 is revealed, which presents important information for understanding the structure of the mysterious Au130 nanoclusters. Theoretical calculations indicated Au130(C≡CR)50 has a smaller HOMO‐LUMO gap than Au130(S−C6H4−4−CH3)50. This facile and reliable synthetic approach will greatly accelerate further studies on all‐alkynyl‐protected gold nanoclusters.
Funder
Key Technologies Research and Development Program
National Natural Science Foundation of China