scholarly journals Electron spin resonance study of transport dynamics of the self-trapped hole in calcium fluoride

1973 ◽  
Author(s):  
Gene E. Fuller ◽  
P. R. Moran
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Calcium Fluoride ◽  
The Self ◽  
Electron Spin Resonance Study ◽  
Transport Dynamics ◽  
Spin Resonance ◽  
Spin Resonance Study

Electron Spin Resonance Study of the Self-disproportionation of some Semiquinone Radicals in Solution

1972 ◽  
Vol 50 (18) ◽  
pp. 3052-3057 ◽  
Author(s):  
S. K. Wong ◽  
W. Sytnyk ◽  
J. K. S. Wan
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
The Self ◽  
Electron Spin Resonance Study ◽  
Radical Anions ◽  
Electron Polarization ◽  
Semiquinone Radicals ◽  
Spin Resonance ◽  
Rate Of Decay ◽  
Spin Resonance Study

The photolysis of 1,4-benzoquinone, duroquinone, and 1,4-naphthoquinone in isopropanol and in dioxane leads to the observation of e.s.r. spectra of the corresponding semiquinone radicals. The rates of the self-disproportionation of these radicals were measured by the rotating-sector technique. In the case of 1,4-naphthoquinone, unexpected e.s.r. emission was initially observed by photochemically induced dynamic electron polarization of the semiquinone radicals. Photolysis of anthraquinone in isopropanol gives e.s.r. spectra of the anthrasemiquinone radical anions. Their rate of decay was measured and a mechanism for the decay was suggested. The neutral anthrasemiquinone radical, however, was observed when photolyzed in dioxane.

The Self-Reaction of sec-Alkylperoxy Radicals: A Kinetic Electron Spin Resonance Study

1972 ◽  
Vol 50 (14) ◽  
pp. 2374-2377 ◽  
Author(s):  
J. A. Howard ◽  
J. E. Bennett
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Rate Constants ◽  
The Self ◽  
Electron Spin Resonance Study ◽  
Absolute Rate ◽  
Arrhenius Plots ◽  
Spin Resonance ◽  
Alkylperoxy Radicals ◽  
Spin Resonance Study

Absolute rate constants for the self-reaction of cyclopentylperoxy, cyclopentenylperoxy, and sec-butylperoxyradicals have been determined over a 125 °C temperature range. Arrhenius plots derived from these rate constants suggest that the mechanism for this reaction is more complex than the currently accepted Russell mechanism.

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