Metallic gold precursors

The possible strategies are coprecipitation to prepare mixed hydroxides or carbonates [5], cosputtering of gold and the metal components of the supports by Ar containing O2 to prepare mixed oxides [23], and amorphous alloying to prepare metallic mixed precursors [24]. These... 

The key effect of oxide supports on the catalytic activities of metal particles is exerted through the interface between oxides and metal particles. The key objective of this study is to develop synthesis methodologies for tailoring this interface. Here, an SSG approach was introduced to modify the surface of mesoporous silica materials with ultrathin films of titanium oxide so that the uniform deposition of gold precursors on ordered mesoporous silica materials by DP could be achieved without the constraint of the low lEP of silica. The surface sol-gel process was originally developed by Kunitake and coworkers.This novel technology enables molecular-scale control of film thickness over a large 2-D substrate area and can be viewed as a solution-based... 

The first descriptions of heteronuclear luminescent supramolecular complexes were given by Fackler et al. in 1988 and 1989. In these studies, one gold-thallium and one gold-lead complex were reported. As in the case of the gold-silver dinuclear systems, the extended systems appeared as a result of the unidirectional polymerization of dinuclear or trinuclear units through metal-metal interactions. These were prepared by reaction of the gold precursor [PPN][Au(MTP)2] (PPN = N(PPh3)2 ... 

In impregnation the pores of the support are filled with a solution of the gold precursor. Where just the needful volume is used, the method is impregnation to incipient wetness, but sometimes an excess of solution is used and the solvent removed by evaporation, so that concentrated solution finally resides in the pores (Sections 4.2.1 and 4.3.1). In these methods, the metal dispersion ultimately obtained depends critically on the conditions of drying.1... 

Gold thin films are of interest as substrates for a variety of applications, and also for metallic contacts. Reports of gold film depositions from metal-organic precursors are limited. Precursors have included Au(hfac)Mc2, Au(acac)Mc2, AuMe(PMc3), AuMe(PEt3), AuMe(P(OMe)2Me), and Au(02CRf)(PR3) (Rf = perfluoroalkyl, R = alkyl, aryl). ... 

At the same dose rate, when the metal ionic precursors are gold and silver cyanides, bimetallic nanoparticles are still formed. However, gcore- Rheu nanoparticfts with a different chemical structure are obtained, indicating the more efficient silver reduction in these... 

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