Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization.

Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization. Research Abstract Details 

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Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization. Abstract Text:

Yuichi Negishi,Yoshimitsu Takasugi,Seiichi Sato,Hiroshi Yao,Keisaku Kimura,Tatsuya Tsukuda,

Small gold clusters (<1 nm) protected by a glutathione (GSH) monolayer were fractionated into six components by polyacrylamide gel electrophoresis, and their chemical compositions were investigated by electrospray ionization mass spectroscopy. The results demonstrate isolation of a series of magic-numbered gold clusters, Au18(SG)11, Au21(SG)12, Au25+/-1(SG)14+/-1, Au28(SG)16, Au32(SG)18, and Au39(SG)23. Their optical absorption spectra are highly structured with clear absorption onsets, which shift toward higher energies with reduction of the core size. These molecular-like gold clusters exhibit visible photoluminescence. The results reported herein provide helpful guidelines or starting points for further experimental and theoretical studies on structures, stabilities, and optical properties of monolayer-protected gold clusters.

Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization. Publishing Authors By Initials

Y Negishi,Y Takasugi,S Sato,H Yao,K Kimura,T Tsukuda,

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Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of the American Chemical Society

VOLUME: 126

Page Numbers: 6518-9

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 2

MONTH: Jun

YEAR: 2004

Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization. Information

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LANGUAGE: eng

NlmUniqueID: 7503056

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Grant and Affiliation Information for Magic-numbered Au(n) clusters protected by glutathione monolayers (n = 18, 21, 25, 28, 32, 39): isolation and spectroscopic characterization.

AFFILIATION: Research Center for Molecular-Scale Nanoscience Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.

Country: United States

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MEDLINETA: J Am Chem Soc

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