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• W2804619348 endingPage "12533" @default.
• W2804619348 startingPage "12524" @default.
• W2804619348 abstract "Controlled synthesis of nanostructure oligomers requires detailed understanding of their wet chemistry and the forces driving the polymerization process. In this paper, we report the main factors affecting the reaction yields of a dithiol-induced synthesis of covalently bound nanocluster dimers and oligomers and present a detailed analysis of possible reaction mechanisms. We synthesize the nanocluster oligomers using monodisperse para-mercaptobenzoic acid (p-MBA)-protected gold nanoclusters with a nominal composition of Au∼250(p-MBA)n to minimize ensemble effects on size, shape, and surface structure. Ligand exchange was performed on the nanoclusters with five different dithiol linkers: 5,5′-bis(mercaptomethyl)-2,2′-bipyridine, 4,4″-thiobisbenzenethiol, benzene-1,4-dithiol, 1,4-benzenedimethanethiol, and dimercaptostilbene. Oligomer yields depend strongly on the used dithiol and on the dithiol-to-nanocluster ratio. Detailed analysis of the reaction yields in combination with simulations suggests that the system reaches a dynamic equilibrium, where ligand exchange happens continuously forming and breaking nanocluster oligomers that are bound together by short chains of disulfide-bridged dithiols. Despite the dynamic nature of the system, dithiol-induced polymerization of nanoclusters is a general and straightforward approach to produce dimers and larger oligomers of thiol-protected nanoclusters. Our work provides physical insight into, offers tools for, and reveals challenges in the controlled synthesis of covalently bound nanoparticle assemblies." @default.
• W2804619348 created "2018-06-01" @default.
• W2804619348 creator A5005673960 @default.
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• W2804619348 creator A5058558299 @default.
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• W2804619348 date "2018-05-17" @default.
• W2804619348 modified "2023-10-16" @default.
• W2804619348 title "Dithiol-Induced Oligomerization of Thiol-Protected Gold Nanoclusters" @default.
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• W2804619348 doi "https://doi.org/10.1021/acs.jpcc.8b02988" @default.
• W2804619348 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6150662" @default.
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• W2804619348 hasPublicationYear "2018" @default.
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