Home About us Contact
|
Home About us Contact | ||
|
|
||
Platinum Clusters (platinum + cluster)
Selected AbstractsChemInform Abstract: Thermal N,H Bond Activation on Anionic and Cationic Platinum Clusters: Non-Predetermined Reaction Pathways Indicate Transitions to a Bulk Surface Reactivity.CHEMINFORM, Issue 46 2009Milan Oncak Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Reactivity of Small Cationic Platinum Clusters.CHEMINFORM, Issue 36 2003Konrad Koszinowski Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Initial Nucleation of Platinum Clusters after Reduction of K2PtCl4 in Aqueous Solution: A First Principles Study.CHEMINFORM, Issue 45 2001Lucio Colombi Ciacchi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Reactions of platinum cluster ions with benzeneRAPID COMMUNICATIONS IN MASS SPECTROMETRY, Issue 12 2006Hongtao Liu In this work, the cation and anion products of the reactions between platinum clusters produced by laser ablation and the benzene molecules seeded in argon have been studied using a high-resolution reflectron time-of-flight mass spectrometer (RTOFMS). The dominant cation products are [C6nH6n,,,k]+ and [Ptm(C6H6)n]+ complexes, while the dominant anion products are dehydrogenated species, [C6H5PtH],, [PtC12Hk], and [PtmC6H4,·,·,·,(C6H6)n],, etc. Some important intermediate structures ([PtC6H6]+, [Pt(C6H6)2]+, [Pt2(C6H6)3]+, [C6H5PtH],, [Pt2C6H4],, [Pt3C6H4], and [Pt4C6H4],) have been analyzed using density functional theory (DFT) calculations. Different reaction mechanisms are proposed for platinum cluster cations and anions with benzene, respectively. Copyright © 2006 John Wiley & Sons, Ltd. [source] Characterization of aluminum,organic-stabilized platinum,colloid networks with electron and photon spectroscopiesAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 5 2003L. Beuermann Abstract We have measured and interpreted the ultraviolet (HeI) and X-ray photoelectron spectra and the metastable impact electron spectra (MIES) from aluminum,organic-stabilized platinum,colloids and colloid networks, deposited on silicon substrates and characterized by X-ray photoelectron spectroscopy, scanning Auger electron microscopy and transmission electron microscopy. MIES, in particular, gives information on the electronic structure of the spacer molecules interconnecting the colloids. In addition, changes in the electronic structure of the platinum clusters that are induced by different spacer molecules were identified by means of X-ray absorption near-edge structure measurements at the platinum LIII -edge of these materials. This combination of techniques was also employed to follow the chemical changes that occur upon heating of the network in situ. It turns out that the thermal decomposition of the network is driven by the disintegration of the spacer molecules. Moreover, less sintering of the colloidal particles occurs in the networked systems than in unconnected particles. Most of the networked platinum,particles are still present in their original shape even after the destruction of spacer molecules. This observation could be linked to the encapsulation of these platinum particles into an (AlO) protecting shell. Copyright © 2003 John Wiley & Sons, Ltd. [source] | ||||||||||