Pt-M Complexes (M=Ag, Au) as Models for Intermediates in Transmetalation Processes

A dinuclear Pt–Au complex showing an unusual metal-metal bonding situation: A snapshot of a transmetalation process

The dinuclear Pt-Au complex [(CNC)(PPh3)PtAu(PPh3)](ClO4) (2) (CNC = 2,6-diphenylpyridinate) has been prepared. Its crystal structure shows a rare metal-metal bonding situation, with very short Pt–Au and Au-Cipso(CNC) distances and dissimilar Pt-Cipso(CNC) bonds. Multinuclear NMR spectra of 2 show the persistence of the Pt–Au bond in solution and the operation of an unusual fluxional behavior i...

Pt(IV) complexes as prodrugs for cisplatin.

The antitumor effects of platinum(IV) complexes, considered prodrugs for cisplatin, are believed to be due to biological reduction of Pt(IV) to Pt(II), with the reduction products binding to DNA and other cellular targets. In this work we used pBR322 DNA to capture the products of reduction of oxoplatin, c,t,c-[PtCl(2)(OH)(2)(NH(3))(2)], 3, and a carboxylate-modified analog, c,t,c-[PtCl(2)(OH)(...

Revealing the active intermediates in the oxidation of formic acid on Au and Pt(111).

The mechanisms of formic acid (HCOOH) oxidation on Au(111) under gas-phase and electrochemical conditions was studied by using density functional theory and then compared with the analogous processes on Pt(111). Our results demonstrate that a mechanism involving a single intermediate molecule is preferred on both Au and Pt(111). Furthermore, under gas-phase conditions, HCOOH oxidation proceeds ...

Interfacial nanodroplets guided construction of hierarchical Au, Au-Pt, and Au-Pd particles as excellent catalysts

Interfacial nanodroplets were grafted to the surfaces of self-sacrificed template particles in a galvanic reaction system to assist the construction of 3D Au porous structures. The interfacial nanodroplets were formed via direct adsorption of surfactant-free emulsions onto the particle surfaces. The interfacial nanodroplets discretely distributed at the template particle surfaces and served as ...

Easy synthesis of highly monodispersed silica @ M ( M = Ag , Au , Pd , Pt ) particles using thiol compounds as a connecting agent