Thiol-functionalized undecagold clusters by ligand exchange: Synthesis, mechanism, and properties

Inorganic Chemistry

Volumn 44, Issue 18, 2005, Pages 6149-6158

  Woehrle, Gerd H ^a   Hutchison, James E ^a  

^a UNIVERSITY OF OREGON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 24944449485     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic048686+     Document Type: Article

References (50)

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29. 11 clusters can be dissolved in ethanol. Exceptions are clusters stabilized with long-chain alkanethiols such octadecanethiol and hexadecanethiol. In these cases, less polar solvents such as 2-propanol must be used for chromatography. Alternatively, dichloromethane or chloroform can be used.
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32. See Supporting Information.
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35. The reported size dispersity of ∼30% is due to the low contrast of the samples, the presence of touching particles, and irregularities in the support film which limits the accuracy of the analysis. Even in the case of the monodisperse, phosphine-stabilized undecagold precursor, size analysis gives 30% size dispersity.
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40. 9 a similar sensitivity to oxidation has not been observed for 1 and the thiol-stabilized exchange products.
41. 6 at 55°C over the course of 12 h.
42. 6 at 55°C over the course of 2 h.
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48. It is known that ligand exchange reactions can result in growth of the nanoparticles and changes in the size dispersity. For example, ligand exchange of 1.5-nm phosphine-stabilized Au nanoparticles with alkylamines leads to nanoparticle growth and ripening (see: Brown, L. O.; Hutchison, J. E. J. Am. Chem. Soc. 1999, 121, 882-883).
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50. The concentration range was chosen to include the concentration typically used for UV-visible spectroscopy of the nanoparticle samples.