Gold nanoparticles protected with triethyleneglycol-Functionalized thiolates: acid-Induced clustering of the aggregates and solvent dependent optical properties

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Gold nanoparticles protected with triethyleneglycol-Functionalized thiolates: acid-Induced clustering of the aggregates and solvent dependent optical properties

Pengo, Paolo; Pasquato, Lucia; Scrimin, Paolo

Journal of supramolecular chemistry, 2002, 2002-1-00, Volume: 2, Issue: 1

Journal Article

Triethylene glycol-functionalized gold nanoparticles have been obtained by exchange reaction from dodecanthiolate-MPCs. 1H NMR allowed to determine a 1:1 ratio of alkyl- to triethylene glycol-functionalized thiolates while TEM images showed an average diameter of 5.4±1.3 nm. Solution UV–vis spectra of this new material in different alcohols present a shift of the surface plasmon band which is in accord with Mie theory. This suggests that the presence of a protecting monolayer able to interact with the solvent does not affect the optical properties of the gold core. These functional MPCs show a acid-induced formation of clusters which is time dependent and whose effect on the optical properties of the aggregate is solvent dependent. Graphic

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Pengo, Paolo | Pasquato, Lucia | Scrimin, Paolo

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