Platinum, atomic energy levels

The optical spectra of Ni, Pd and Pt in noble gas matrices have been measured in order to search for complexes of these Group VIII ligands. Changes in the energy levels of the matrix isolated atoms occur because of a weak metal interaction. For platinum the frequency shifts follow the trend Xe > Ar > Kr, but whether this interaction is described as a Van der Waals interaction or a weak coordinate bond is open to speculation.1976... 

Conductive anodic silicon oxide films can be produced by doping a submonolayer of platinum in the oxide. ° The platinum is deposited on the silicon surface gal-vanostatically from 5% H2PtCl6 for a thickness from 0.002 to 2.5 monolayers. The silicon is then anodized in 0.2 M H2SO4 under illumination followed by a heat treatment. The Pt is present in the film at 0.25 (at Si/Si02) to 0.03 (SiOa/solution) atom % and either as Pt or as PtO with an energy level close to the n-Si valence band edge. 

The electronic structures of iron, cobalt, nickel, and the platinum metals are given in Table 19-1, as represented in the energy-level diagram of Figure 5-6. It is seen that each of the atoms has two outermost electrons, in the 4s orbital for iron, cobalt, and nickel, the 55 orbital for ruthenium. 

It starts with a compilation of the properties of the isotopes, followed by the description of the formation and separation of the radioactive isotopes. The chapters on the atoms and atomic ions deal with the configuration of the outer-shell electrons, manifested by optical terms and spectra, ionization energy, and electron affinity, as well as with the energy levels of the inner-shell electrons, manifested by X-ray spectra and Auger electron spectra. The last section gives information on the formation and the physical properties of the platinum group molecules and clusters. 

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