Electron Paramagnetic Resonance Absorption in Oriented Phosphorescent Chrysene at Magnetic Fields below 125 G. I. Multiplet Structure in Low‐Field EPR Spectra

1972 ◽  
Vol 56 (3) ◽  
pp. 1359-1379 ◽  
Author(s):  
Roger E. Gerkin ◽  
Arthur M. Winer
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Magnetic Fields ◽  
Resonance Absorption ◽  
Epr Spectra ◽  
Multiplet Structure ◽  
Paramagnetic Resonance ◽  
Low Field ◽  
Electron Paramagnetic

Electron Paramagnetic Resonance of Radicals Formed during Milling

1960 ◽  
Vol 33 (2) ◽  
pp. 462-468 ◽  
Author(s):  
S. E. Bresler ◽  
S. N. Zhurkov ◽  
E. N. Kazbekov ◽  
E. M. Saminskiĭ ◽  
E. E. Tomashevskiĭ
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Gamma Rays ◽  
Epr Spectra ◽  
Mechanical Degradation ◽  
Present Communication ◽  
Surface Layers ◽  
Paramagnetic Resonance ◽  
Mechanical Destruction ◽  
Electron Paramagnetic

Abstract It is well known that during the mechanical degradation of polymers there takes place scission of molecular chains and the formation of macroradicals. It is of considerable interest to study the electron paramagnetic resonance (EPR) spectra of the macroradicals produced by milling, and to compare them with the spectra of the macroradicals formed in the process of polymerization, and also during the irradiation of polymers by gamma rays and neutrons. We may endeavor to compare the amount of macroradicals formed with the extent of mechanical destruction (for instance with the area of the new interface which is formed). In addition, as was found by experience, the macroradicals formed by mechanical scission are good models for the investigation of reactivity since practically all of them are in the newly formed surface layers and are therefore very accessible to various chemical influences. They enter easily into reaction with various agents present in the medium since in this process diffusion from the surface is found in practice not to be a predominating factor. In the present communication we give the first EPR results obtained on mechanically degraded polymers.

Electron Paramagnetic Resonance Absorption in Oxygen with the HCN Laser

1968 ◽  
Vol 21 (15) ◽  
pp. 1038-1040 ◽  
Author(s):  
K. M. Evenson ◽  
H. P. Broida ◽  
J. S. Wells ◽  
R. J. Mahler ◽  
M. Mizushima
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Resonance Absorption ◽  
Paramagnetic Resonance ◽  
Hcn Laser ◽  
Electron Paramagnetic
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