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Small Gold Nanoparticles Synthesized with Sodium Citrate and Heavy Water: Insights into the Reaction Mechanism

AuthorsOjea-Jiménez, Isaac CSIC; Romero, Francisco M.; Bastús, Neus G. CSIC ORCID; Puntes, Víctor F. CSIC ORCID
Issue Date2010
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry C 114(4): 1800-1804 (2010)
AbstractThe effect of solvent isotopic replacement (H for D) on the size of gold nanoparticles (Au NPs) prepared by sodium citrate reduction has been investigated. With increasing replacement of water by deuterium oxide, smaller sizes of Au NPs are obtained, which is interpreted as a consequence of a faster reduction. A mechanism in which a substitution complex, [AuCl3(C6H5O7)−2]−, is formed from AuCl4 and citrate ions prior to its rate-limiting disproportionation into products is suggested. This novel procedure offers an attractive alternative to the existing ones and opens a full range of possibilities for biological studies.
Description5 páginas, 3 figuras, 1 esquema.
Publisher version (URL)http://dx.doi.org/10.1021/jp9091305
Appears in Collections:(CIN2) Artículos
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