NDLI: Controlled growth of molecularly pure Au$_{25}$(SR)$_{18}$ and Au$_{38}$(SR)$_{24}$ nanoclusters from the same polydispersed crude product

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Controlled growth of molecularly pure Au$_{25}$(SR)$_{18}$ and Au$_{38}$(SR)$_{24}$ nanoclusters from the same polydispersed crude product

Content Provider	Springer Nature Link
Author	Qian, HuiFeng Liu, Chao Jin, RongChao
Copyright Year	2012
Abstract	We report the controlled growth of Au$_{25}$(SR)$_{18}$ and Au$_{38}$(SR)$_{24}$ (where R = CH$_{2}$CH$_{2}$Ph) nanoclusters of molecular purity via size-focusing from the same crude product that contains a distribution of nanoclusters. In this method, gold salt was first mixed with tetraoctylammonium bromide (TOAB), and then reacted with excess thiol to form Au(I)-SR polymers in THF (as opposed to toluene in previous work), followed by NaBH$_{4}$ reduction. The resultant crude product contains polydisperse nanoclusters and was then used as the common starting material for controlled growth of Au$_{25}$(SR)$_{18}$ and Au$_{38}$(SR)$_{24}$, respectively. In Route I, Au$_{25}$(SR)$_{18}$ nanoclusters of molecular purify were produced from the crude product after 6 h aging at room temperature. In Route II, the crude product was isolated and further subjected to thermal thiol etching in a toluene solution containing excess thiol, and one obtained pure Au$_{38}$(SR)$_{24}$ nanoclusters, instead of Au$_{25}$(SR)$_{18}$. This work not only provides a robust and simple method to prepare both Au$_{25}$(SR)$_{18}$ and Au$_{38}$(SR)$_{24}$ nanoclusters, but also reveals that these two nanoclusters require different environments for the size-focusing growth process.
Starting Page	2359
Ending Page	2365
Page Count	7
File Format	PDF
ISSN	16747291
Journal	Science in China Series B: Chemistry
Volume Number	55
Issue Number	11
e-ISSN	18691870
Language	English
Publisher	SP Science China Press
Publisher Date	2012-07-13
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	gold nanoclusters nanoparticle atomic precision Au$_{25}$ Au$_{38}$ Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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