The interaction of gold nanoparticles (AuNPs) and typical tetracyano-quinoidal compounds such as bis(dicyanomethylene)-bithiophene and tetracyanoquinodimethane (TCNQ) has been investigated. AuNPs in toluene solution reduce the tetracyano-compounds to the radical anion as shown by UV-vis spectroscopy. The reaction, promoted by the bromide anion used as stabilizer for AuNPs, involves in the case of TCNQ the total amount of Au(0) in the nanoparticles. A spectrophotometric method for the evaluation of the Au(0) content of capped AuNPs in organic solution has been established and successfully applied to the analysis of dodecanethiol-capped AuNPs.
Reaction of gold nanoparticles and tetracyano-quinoidal molecules. A spectrophotometric determination of the Au(0) content of gold nanoparticles
Zotti G;Vercelli B;Berlin A
2008
Abstract
The interaction of gold nanoparticles (AuNPs) and typical tetracyano-quinoidal compounds such as bis(dicyanomethylene)-bithiophene and tetracyanoquinodimethane (TCNQ) has been investigated. AuNPs in toluene solution reduce the tetracyano-compounds to the radical anion as shown by UV-vis spectroscopy. The reaction, promoted by the bromide anion used as stabilizer for AuNPs, involves in the case of TCNQ the total amount of Au(0) in the nanoparticles. A spectrophotometric method for the evaluation of the Au(0) content of capped AuNPs in organic solution has been established and successfully applied to the analysis of dodecanethiol-capped AuNPs.| File | Dimensione | Formato | |
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Descrizione: Reaction of gold nanoparticles and tetracyano-quinoidal molecules. A spectrophotometric determination of the Au(0) content of gold nanoparticles
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