Raman spectroscopy of benzenethiolates on nanometer-scale gold clusters

Article Abstract:

Raman spectra of discrete, molecular-scale [Au.sub.N][(SPH).sub.M] monolayer-protected gold clusters (MPCs) were obtained for comparison to earlier reports of -SPh on gold extended surfaces to better understand the binding of thiolates on small gold cores and the role surface monolayer might have on cluster properties. The Raman spectra of the clusters were found to bear a strong resemblance to those obtained for nonmetallic [[(Au.sup.(I)]Sph).sub.x] polymer samples that are not in resonant absorption at the laser wavelength.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Mercaptans, Usage, Raman spectroscopy, Thiols, Ammonium compounds, Ammonium chloride, Ammonium paratungstate, Ammonium salts

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Theoretical study of ethynylbenzene adsorption on Au(111) and implications for a new class of self-assembled monolayer

Article Abstract:

Density function calculations of the adsorption of the ethynylbenzene on the Au(111) surface show that, after cleavage of the C-H bond, the terminal carbon makes a strong covalent bond on the surface. The reaction energy for the formation of the surface-bound vinylidene is estimated to be 5 Kcal.mol(super -1) exothermic relative to the isolated ethynylbenxene and gold substrate.

Analysis, Design and construction, Monomolecular films, Adsorption

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Identification of adsorbed phenyl (C6H5) groups on metal surfaces: Electron-induced dissociation of benzene on Au(111)

Article Abstract:

Thermal and electron-induced chemistry of benzene (C6H6) adsorbed on a Au(111) surface is investigated. It is suggested that Au atoms may play a more important role in bimetallic hydrocarbon conversion catalysis than simply blocking reactive sites.

Science & research, Research, Electric properties, Chemistry, Physical and theoretical, Physical chemistry, Phenyl group

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