The significance of bromide in the Brust-Schiffrin synthesis of thiol protected gold nanoparticles.
The significance of bromide in the Brust-Schiffrin synthesis of thiol protected gold nanoparticles.
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DOI:
10.1039/c7sc03266h
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发表时间:
2017-12-01
期刊:
影响因子:
8.4
通讯作者:
Dryfe RAW
中科院分区:
文献类型:
--
作者:
Booth SG;Uehara A;Chang SY;La Fontaine C;Fujii T;Okamoto Y;Imai T;Schroeder SLM;Dryfe RAW
The mechanism of the two-phase Brust–Schiffrin synthesis of alkane thiol protected metal nanoparticles has been shown to be highly sensitive to the precursor species and reactant conditions. The mechanism of the two-phase Brust–Schiffrin synthesis of alkane thiol protected metal nanoparticles is known to be highly sensitive to the precursor species and reactant conditions. In this work X-ray absorption spectroscopy is used in conjunction with liquid/liquid electrochemistry to highlight the significance of Br– in the reaction mechanism. The species [AuBr4]– is shown to be a preferable precursor in the Brust–Schiffrin method as it is more resistant to the formation of Au(i) thiolate species than [AuCl4]–. Previous literature has demonstrated that avoidance of the Au(i) thiolate is critical to achieving a good yield of nanoparticles, as [Au(i)X2]– species are more readily reduced by NaBH4. We propose that the observed behavior of [AuBr4]– species described herein explains the discrepancies in reported behavior present in the literature to date. This new mechanistic understanding should enable nanoparticle synthesis with a higher yield and reduce particle size polydispersity.
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影响因子:
4.9
作者:
Li, Ying;Zaluzhna, Oksana;Tong, YuYe J.
通讯作者:
Tong, YuYe J.
影响因子:
8.6
作者:
Foos, EE;Snow, AW;Ancona, MG
通讯作者:
Ancona, MG
影响因子:
7.4
作者:
Haiss, Wolfgang;Thanh, Nguyen T. K.;Fernig, David G.
通讯作者:
Fernig, David G.
DOI:
10.1039/dt9730001845
发表时间:
1973-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子:
--
作者:
BRAUNSTE.P;CLARK, RJH
通讯作者:
CLARK, RJH
影响因子:
4
作者:
Kasuno, Megumi;Matsuyama, Yuki;Iijima, Misaki
通讯作者:
Iijima, Misaki