Journal
CANADIAN JOURNAL OF CHEMISTRY
Volume 90, Issue 1, Pages 145-152Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/V11-146
Keywords
gold nanoparticles; functionalized ionic liquids; gold(I) complexes; surface plasmon band; imidazolium salts
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- Fonds de recherche sur la nature et les technologies (FQRNT)
- Canada Research Chairs
- Centre for Green Chemistry and Catalysis (CGCC)
- McGill University
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Gold nanoparticles (Au NPs) stabilized with six different thiolate-functionalized ionic liquids (TFILs) were synthesized in an organic solvent. The size and optical properties of the TFIL-stabilized Au NPs can be rationally controlled by altering the N-alkyl chain length and (or) the counteranion of the TFIL-stabilizing ligand. Au NPs were prepared from the reduction of a gold precursor (HAuCl4 or [Au-C C-t-Bu](4)) employing NaBH4 in the presence of the different disulfide precursors. A model, based on Israelachvili theory, is proposed to account for the dependence of NP size on the N-alkyl chain length and the counteranion of the surfactantlike TFIL stabilizers.
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