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Title: Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster
Authors: Li, Ying-Zhou
Ganguly, Rakesh
Hong, Kar Yiu
Li, Yongxin
Tessensohn, Malcolm Eugene
Webster, Richard
Leong, Weng Kee
Keywords: DRNTU::Science::Chemistry
Stibine-protected Au13
Issue Date: 2018
Source: Li, Y.-Z., Ganguly, R., Hong, K. Y., Li, Y., Tessensohn, M. E., Webster, R., & Leong, W. K. (2018). Stibine-protected Au13 nanoclusters: syntheses, properties and facile conversion to GSH-protected Au25 nanocluster. Chemical Science, 9(46), 8723-8730. doi:10.1039/C8SC03132K
Series/Report no.: Chemical Science
Abstract: Monostibine-protected ionic Au13 nanoclusters, namely, [Au13(L)8(Cl)4][Cl] (L= SbPh3, 2a·Cl; Sb(p-tolyl)3, 2b·Cl) were prepared by the direct reduction of Au(L)Cl with NaBH4 in dichloromethane. Anion exchange with 2a·Cl afforded [Au13(SbPh3)8(Cl)4][X] (X = PF6, 2a·PF6; BPh4, 2a·BPh4). All these have been characterized by multinuclear NMR, ESI-MS and UV-Vis spectroscopy. Crystallographic analysis of 2a·BPh4 reveals that the cation possesses C2v symmetry and the tridecagold core adopts a closed icosahedron configuration. The weaker coordinating ability of the stibine ligands leads to the ready reaction of 2b·Cl with PPh3 or glutathione (GSH) to form the smaller phosphine-protected cluster [Au11(PPh3)8Cl2][Cl] or larger thiolate-protected cluster Au25(SG)18, respectively. In the latter reaction, the addition of a small amount (0.5 to 3.5 equivalents) of a suitable oxidant such as K3(Fe(CN)6 accelerates the conversion rate significantly.
ISSN: 2041-6520
DOI: 10.1039/C8SC03132K
Rights: © 2018 The Author(s) (published by Royal Society of Chemistry). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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