Rationally Designed Ligands that Inhibit the Aggregation of Large Gold Nanoparticles in Solution

摘要: Hexadecanethiol (n-C16), 2,2-dimethylhexadecane-1-thiol (DMC16), and the multidentate thiol-based ligands 2-tetradecylpropane-1,3-dithiol (C16C2), 2-methyl-2-tetradecylpropane-1,3-dithiol (C16C3), 1,1,1-tris(mercaptomethyl)pentadecane (t-C16) were evaluated for their ability to stabilize large gold nanoparticles (>15 nm) in organic solution. Citrate-stabilized (20−50 treated with extracted from aqueous solution dispersed into toluene. The degree of aggregation was monitored visually further confirmed by UV−vis spectroscopy dynamic light scattering (DLS). bidentate (C16C2 C16C3) particularly tridentate ligand showed enhanced abilities inhibit For modified these ligands, bound thiolate (S2p3/2 binding energy 162 eV) predominant sulfur species (>85%) as X-ray photoelect...