Epr Investigation Of Sol-Gel Processes. Part 1. Mn2+ Spin Label - A Simple Structural Relaxation Model

The EPR spectroscopy of Mn2+ spin label was used to investigate the structural evolution of SiO2 xerogel. Analysis of the EPR spectra shows a decrease of the half width of spectral lines of the Mn2+ hyperfine structure. This is caused by retardation of the spin label mobility as a consequence of densification and strengthening of the xerogel structure with the treatment temperature. The same features were observed in the measured spectra of the heat treated xerogel during its ageing. A model was proposed and statistical analysis was used to verify its reliablity.

Author

H Hulinova Et Al

Origin

Slovak Academy Of Sciences, Czech

Journal Title

Physics And Chemistry Of Glasses 34 4 1993 164-167

Sector

Special Glass

Class

S 738

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Journal Title Physics And Chemistry Of Glasses 34 4 1993 164-167

Class S 738

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Epr Investigation Of Sol-Gel Processes. Part 1. Mn2+ Spin Label - A Simple Structural Relaxation Model

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