Radiation damage in some platinum(IV) complexes produced during soft X-ray photoelectron spectroscopic studies

Abstract

The results of a study of the reduction of some platinum(1v) compounds during the course of X-ray photoelectron measurements are presented. All the compounds investigated suffered reduction though the observed rates varied considerably. Kinetic analysis of the peak intensities in the X-ray photoelectron spectra reveal that the reduction process is invariably first order, and a model is proposed to account for this finding. Platinum(I1) compounds studied were stable to X-radiation.

Luminescence Rigidochromism and Redox Chemistry of Pyrazolate-Bridged Binuclear Platinum(II) Diimine Complex Intercalated into Zirconium Phosphate Layers

“…On the other hand, typical Pt 4f binding energies for Pt(IV) complexes are between 2 and 3 eV greater than their Pt(II) analogues. 28,65,67 Pt(III) 4f binding energies also are typically greater than the values obtained here, occurring in the 74.6−78.5 eV range. 25,35 Therefore, the binding energies for the major component are consistent with an oxidation state intermediate between Pt(II) and Pt(III).…”

A close look at dose: Toward L-edge XAS spectral uniformity, dose quantification and prediction of metal ion photoreduction

“…In X-ray emission spectroscopy (XES) [115], XPS [101,102,104,105,[116][117][118][119] photo(electron) induced surface desorption [65,120,121] communities, such effects have been acknowledged to occur. We hope that this work will inspire attempts to generalize the empirically observed effects of other beam induced chemistry (and physics) processes.…”

X-ray photoelectron spectroscopic study of catalyst based zinc oxide thin films

“…The main reason for chemical decomposition is the flux of secondary electrons, either those produced inside the sample by slowing down the primary photoelectrons [22], or those coming to the sample from the surroundings [23]. Inelastic collisions can induce further valence or core electron ionizations (generating lower energy secondary electrons) or induce transitions from the valence band to the conduction band, producing freely propagating excitons [24]. As a result, solid material bathed in high energy radiation can acquire a stationary concentration of excitonic pairs, especially when irradiated with lower energy photons from Bremsstrahlung.…”