Hexachlorododecakis(Triphenyl‐Phosphine)Pentapentacontagold, Au ₅₅ [P(C ₆ H ₅ ) ₃ ] ₁₂ CL ₆

Chiral Gold Nanoparticles

“…Procedures for the preparation of NPs are in constant progress, but till now only a few methods yield monodisperse particles with high purity. [26,30,[34][35][36][37] However, this fine-tuning can be performed after appropriate purification and separation processes. Current methods for purification of NPs samples, that is, removal of free ligand and reducing agent, involve centrifugation, precipitation, washing, dialysis, chromatography, or extraction to remove impurities.…”

“…Indeed, some AuNPs are very well characterized and both their separation and purification processes are well established. [28] The AuNPs prepared by the citrate method of Turkevich et al [29] and those developed by Schmid, [30] which are protected by triphenylphosphine, are surely the most frequently used AuNPs for the ligand exchange reaction. This strategy avoids the time-consuming search for efficient parameters for purification and separation of each new type of AuNPs.…”

Optically active histidin-2-ylidene stabilised gold nanoparticles

“…[21][22][23][32][33][34] Therefore, to form AuNPs, t BuNH 2 ÁBH 3 was used as the reducing agent and added to solutions of either 2(L) or 2(D) in THF which resulted in the formation of a deep red solution, with no signs of aggregate formation. In order to isolate the pure AuNP, excess of reducing agent had to be removed.…”

Metal-Based Composite Nanomaterials

“…Phase transfer involving ligand exchange is an important issue for the synthesis of nanoparticles with the desired properties and functional groups since different kinds of stabilizing agent, such as tetraoctylammonium (Mayer et al 2003;Gandubert and Lennox 2005), citrate , lauric acid (Lisiecki et al 2003), phosphine (Schmid 1990;Petit et al 1998;Woehrle et al 2005), and polymers (Teranishi and Miyake 1998;Teranishi et al 1999;Xia 2003, 2004;Wiley et al 2005), are usually used at the beginning of or during the particle synthesis process. The particles are all first prepared under the optimized conditions and then subjected to ligand exchange to realize the phase transfer from the aqueous solutions to organic media, or vice versa.…”