Stibine-protected Au13 nanoclusters: Syntheses, properties and facile conversion to GSH-protected Au25 nanocluster

Ying Zhou Li; Rakesh Ganguly; Kar Yiu Hong; Yongxin Li; Malcolm Eugene Tessensohn; Richard Webster; Weng Kee Leong

doi:10.1039/c8sc03132k

Stibine-protected Au₁₃ nanoclusters: Syntheses, properties and facile conversion to GSH-protected Au₂₅ nanocluster

Ying Zhou Li, Rakesh Ganguly, Kar Yiu Hong, Yongxin Li, Malcolm Eugene Tessensohn, Richard Webster, Weng Kee Leong^*

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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 C_2v 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.

Original language	English
Pages (from-to)	8723-8730
Number of pages	8
Journal	Chemical Science
Volume	9
Issue number	46
DOIs	https://doi.org/10.1039/c8sc03132k
Publication status	Published - 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 The Royal Society of Chemistry.

ASJC Scopus Subject Areas

General Chemistry

Access to Document

10.1039/c8sc03132k

Cite this

@article{3684e54c4a004541adc54d89783bedc7,

title = "Stibine-protected Au13 nanoclusters: Syntheses, properties and facile conversion to GSH-protected Au25 nanocluster",

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.",

author = "Li, {Ying Zhou} and Rakesh Ganguly and Hong, {Kar Yiu} and Yongxin Li and Tessensohn, {Malcolm Eugene} and Richard Webster and Leong, {Weng Kee}",

note = "Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry.",

year = "2018",

doi = "10.1039/c8sc03132k",

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T2 - Syntheses, properties and facile conversion to GSH-protected Au25 nanocluster

AU - Li, Ying Zhou

AU - Ganguly, Rakesh

AU - Hong, Kar Yiu

AU - Li, Yongxin

AU - Tessensohn, Malcolm Eugene

AU - Webster, Richard

AU - Leong, Weng Kee

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

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