Identification of a Highly Luminescent Au(SG) Nanocluster.
The luminescence property of thiolated gold nanoclusters (Au NCs) is thought to involve the Au(I)-thiolate motifs on the NC surface; however, this hypothesis remains largely unexplored because of the lack of precise molecular composition and structural information of highly luminescent Au NCs. Here...
| Publicado en: | Journal of the American Chemical Society Vol. 136; no. 4; pp. 1246 - 1250 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Chemical Society
1/29/2014
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=94488521&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 94488521 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 1/29/2014 vid: 136 iid: 4 pid: 997 pub: American Chemical Society artinfo: ui: 94488521 10.1021/ja411643u ppf: 1246 ppct: 4 formats: tig: atl: Identification of a Highly Luminescent Au(SG) Nanocluster. aug: au: Yong Yu Zhentao Luo Chevrier, Daniel M. Tai Leong, David Peng Zhang De-en Jiang Jianping Xie affil: Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 119260 Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States su: Microclusters Luminescence Thiolates Gold nanoparticles Clustering of particles Density functional theory X-ray absorption near edge structure sug: subj: Microclusters Luminescence Thiolates Gold nanoparticles Clustering of particles Density functional theory X-ray absorption near edge structure ab: The luminescence property of thiolated gold nanoclusters (Au NCs) is thought to involve the Au(I)-thiolate motifs on the NC surface; however, this hypothesis remains largely unexplored because of the lack of precise molecular composition and structural information of highly luminescent Au NCs. Here we report a new red-emitting thiolated Au NC, which has a precise molecular formula of Au(SR) and exhibits intense luminescence. Interestingly, this new Au(SR) species shows distinctively different absorption and emission features from the previously reported Au(SR), Au(SR), and Au(SR). In stark contrast, Au(SR) luminesces intensely at ~665 nm with a high quantum yield of ~8%, while the other three Au NCs show very weak luminescence. Our results indicate that the luminescence of Au(SR) originates from the long Au(I)-thiolate motifs on the NC surface via the aggregation-induced emission pathway. Structure prediction by density functional theory suggests that Au(SR) has two RS-[Au-SR] and two RS-[Au-SR] motifs, interlocked and capping on a prolate Au core. This predicted structure is further verified experimentally by Au L-edge X-ray absorption fine structure analysis. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2014 holdings: @attributes: islocal: N |
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