Applied Magnetic Resonance

, Volume 14, Issue 2–3, pp 169–182 | Cite as

Generation and EPR characterization of color centers at the surface of ionic oxides

  • M. C. Paganini
  • M. Chiesa
  • E. Giamello
  • D. M. Murphy
Article
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Abstract

The activation of the surface of high surface area alkali-earth oxides to form surface color centers is described in detail. Two methods (the radiative coloring and the additive coloring by means of vapors of low ionization energy metals) have been adopted to form surface electron excess centers of various complexity. The EPR technique is essential to describe the nature and the structural features of the paramagnetic centers. The electron rich surface quickly reacts with a variety of adsorbed molecules forming adsorbed anions and radical anions. Two examples of such reactivity are illustrated in the final part of the paper.

Keywords

Unpaired Electron Trap Electron Color Center Hyperfine Structure Metal Vapor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer 1998

Authors and Affiliations

  • M. C. Paganini
    • 1
  • M. Chiesa
    • 1
  • E. Giamello
    • 1
  • D. M. Murphy
    • 2
  1. 1.Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei MaterialiUniversitá di TorinoTorinoItaly
  2. 2.Department of ChemistryUniversity of Wales CardiffCardiffUK

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