Palladium and platinum

Hydrothermal Synthesis of Platinum Group Metal Nanoparticles

“…Their utilization involves catalytic converters for catalytic control of car exhaust emissions, jewellery and watchmaking, chemical and petroleum refining industry (superb catalysts), electronics (hard drives), fuel cells (also as catalysts), liquid crystal display (LCD) glass and other glasses, anticancer drugs, spark plugs, electrodes, sensors, turbine engine coatings, medical components, dental alloys etc. [1][2][3] The use of platinum group metals as catalysts requires the largest possible active surface with an aim to provide a maximum possible number of catalytically active sites. A high surface area relative to volume ratio is obtained by using metal particles in the nanometer range as a catalytically active substance, either suspended in a reaction solution (quasi-homogeneous catalysis) or deposited on a particular support (heterogeneous catalysis).…”

Unusual Reaction between (Nitrile)Pt Complexes and Pyrazoles: Substitution Proceeds via Metal-Mediated Nitrile−Pyrazole Coupling Followed by Elimination of the Nitrile

“…Liberation of the Imino Ligands from the Platinum Complexes. Although metal-mediated coupling between azaheterocycles and nitriles has already been observed, − in all the reported instances, the reaction results in the formation of the chelated pyrazolylimino species (Figure ); these should be rather inert toward substitution (see, for example, ref ), and no attempts for liberation of NHC(Et)(3,5-RR‘pz) were undertaken. In our case, the formation of open-chain rather than chelated ligands gives better potential opportunities for their substitution, and we decided to explore this route for the preparation of these yet unknown compounds by the displacement of NHC(Et)(3,5-RR‘pz) from their Pt(IV) and Pt(II) complexes.…”