Synthesis of hydrophobic gold nanoclusters: growth mechanism study,luminescence property and catalytic application |
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Authors: | Tamil Selvi Selvam Kai-Ming Chi |
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Institution: | (1) Department of Chemistry and Biochemistry, National Chung Cheng University, Min-Hsiung, Chia-Yi, 621, Taiwan; |
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Abstract: | One-pot synthesis of well dispersed, size-controlled gold nanoparticles with the average size of 10–15 nm and luminescent
gold nanoclusters with average size of 1.7–2.0 nm were successfully achieved by thermal decomposition of gold organometallic
precursor CH3AuPPh3 in the presence of thiol surfactants in o-xylene. Only difference between the preparations of two types of Au nanoparticles is the amount of thiol surfactant employed.
The mechanistic study of formation of gold nanoparticles was carried out by analyzing the samples at different reaction time
intervals and revealed that two-staged growth process was involved. The nanoclusters showed strong red emission with the maximum
intensity at about 600 nm. The maximum room temperature photoluminescence quantum yield was measured as 1.2%. The catalytic
ability of the Au nanoclusters to promote Suzuki–Miyaura coupling involving the C–C bond formation was also investigated. |
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