title: Synthesis and characterization of phosphido-monolayer-protected gold nanoclusters.
abstract: Gold-phosphido-monolayer-protected clusters (MPCs) of 1-2-nm diameter, Au(x)(PR2)y, analogues of the well-known thiolate materials Au(x)(SR)y, were prepared by NaBH4 reduction of a mixture of HAuCl4.3H2O and a secondary phosphine PHR2 in tetrahydrofuran/water. In comparison to the Au-thiolate MPCs, fewer of the larger phosphido groups are required to cover the surface, and the Au-P bond is not cleaved as readily in reactions with small molecules as is its Au-S counterpart. 31P NMR spectroscopy provides a direct method to study cluster formation and the interaction of the phosphido ligand with the gold surface.
authors.forename: Diana M
authors.initials: DM
authors.lastname: Stefanescu
authors.forename: David S
authors.initials: DS
authors.lastname: Glueck
authors.forename: Renée
authors.initials: R
authors.lastname: Siegel
authors.forename: Roderick E
authors.initials: RE
authors.lastname: Wasylishen
mesh_terms: D006046:Gold / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010316:Particle Size; D010720:Phosphines / Q000737:chemistry*; D010759:Phosphorus Isotopes; D012015:Reference Standards; D013499:Surface Properties
chemical_list: D008024:Ligands; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D010720:Phosphines; D010759:Phosphorus Isotopes; D006046:Gold