Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster
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...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/89306 http://hdl.handle.net/10220/47696 |
| _version_ | 1811685470872010752 |
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| author | Li, Ying-Zhou Ganguly, Rakesh Hong, Kar Yiu Li, Yongxin Tessensohn, Malcolm Eugene Webster, Richard Leong, Weng Kee |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Li, Ying-Zhou Ganguly, Rakesh Hong, Kar Yiu Li, Yongxin Tessensohn, Malcolm Eugene Webster, Richard Leong, Weng Kee |
| author_sort | Li, Ying-Zhou |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T04:45:02Z |
| format | Journal Article |
| id | ntu-10356/89306 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:45:02Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/893062023-02-28T19:36:05Z Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster Li, Ying-Zhou Ganguly, Rakesh Hong, Kar Yiu Li, Yongxin Tessensohn, Malcolm Eugene Webster, Richard Leong, Weng Kee School of Physical and Mathematical Sciences DRNTU::Science::Chemistry Diphosphine Stibine-protected Au13 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. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2019-02-18T08:12:37Z 2019-12-06T17:22:29Z 2019-02-18T08:12:37Z 2019-12-06T17:22:29Z 2018 Journal Article 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 2041-6520 https://hdl.handle.net/10356/89306 http://hdl.handle.net/10220/47696 10.1039/C8SC03132K en Chemical Science © 2018 The Author(s) (published by Royal Society of Chemistry). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. 8 p. application/pdf |
| spellingShingle | DRNTU::Science::Chemistry Diphosphine Stibine-protected Au13 Li, Ying-Zhou Ganguly, Rakesh Hong, Kar Yiu Li, Yongxin Tessensohn, Malcolm Eugene Webster, Richard Leong, Weng Kee Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title | Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title_full | Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title_fullStr | Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title_full_unstemmed | Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title_short | Stibine-protected Au 13 nanoclusters : syntheses, properties and facile conversion to GSH-protected Au 25 nanocluster |
| title_sort | stibine protected au 13 nanoclusters syntheses properties and facile conversion to gsh protected au 25 nanocluster |
| topic | DRNTU::Science::Chemistry Diphosphine Stibine-protected Au13 |
| url | https://hdl.handle.net/10356/89306 http://hdl.handle.net/10220/47696 |
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