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EPR monitoring of sol-gel processes

Code: CP7

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Abstract

Electron Paramagnetic Resonance (EPR) spectra of paramagnetic probes (free radical, 4-oxo-Tempo for non-doped glasses and vanadyl sulfate for doped silica glass) provide a non-intrusive means of monitoring of the dynamics of the sol-gel process. The free radical spectra parameters (rotation correlation time, isotropic hyperfine interaction parameter and line width) reflect changes in viscosity and polarity in the vicinity of the spin label. The EPR spectra of vanadyl can be used for monitoring the sol-gel process in that different types of mixed vanadyl complexes are formed during glass molding.

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Authors and Affiliations

  1. Ben Gurion University of the Negev, 84105, Be'er Sheva, Israel

    A. Shames

  2. The Hebrew University of Jerusalem, 91904, Jerusalem, Israel

    O. Lev, Y. Berkovich & B. Iosefzon-Kuyavskaya

Authors
  1. A. Shames
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  2. O. Lev
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  3. Y. Berkovich
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  4. B. Iosefzon-Kuyavskaya
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Shames, A., Lev, O., Berkovich, Y. et al. EPR monitoring of sol-gel processes. J Sol-Gel Sci Technol 2, 255–258 (1994). https://doi.org/10.1007/BF00486251

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  • DOI: https://doi.org/10.1007/BF00486251

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