Radiolysis of ethyl iodide and carbon tetrachloride mixtures at 77°K

1968 ◽  
Vol 46 (10) ◽  
pp. 1625-1632 ◽  
Author(s):  
R. M. Leblanc ◽  
F. C. Thyrion ◽  
J. A. Herman
Keyword(s):  
Electron Spin Resonance ◽  
Charge Transfer ◽  
Carbon Tetrachloride ◽  
Electron Spin ◽  
Ethyl Iodide ◽  
Ion Molecule Reactions ◽  
Positive Ions ◽  
Spin Resonance ◽  
Γ Rays ◽  
The Difference

The radical yields of C2H5• and CCl3• observed by electron spin resonance of CCl4 + C2H5I mixtures irradiated by γ rays at 77°K are compared with yields of HCl, I2, and HI measured after thawing. The dissociative capture of thermalized electrons by CCl4 is extremely effective and accounts for most of the observed radicals. The difference between yields of HCl and CCl3• results from charge transfer from C2H5I+ to CCl3•. The formation of iodine proceeds both from neutralization processes of Cl− ions with positive ions formed from C2H5I, and from ion–molecule reactions.

scholarly journals The Electron Spin Resonance of Sodium Polyphosphate Glass Irradiated with γ-Rays

1966 ◽  
Vol 39 (1) ◽  
pp. 196-196 ◽  
Author(s):  
Masaji Miura ◽  
Akinori Hasegawa
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Sodium Polyphosphate ◽  
Spin Resonance ◽  
Γ Rays

Electron spin resonance studies of polycarbonate irradiated by γ-rays and ultraviolet light

1970 ◽  
Vol 8 (3) ◽  
pp. 651-663 ◽  
Author(s):  
Yoshimasa Hama ◽  
Kenichi Shinohara
Keyword(s):  
Electron Spin Resonance ◽  
Ultraviolet Light ◽  
Electron Spin ◽  
Spin Resonance ◽  
Γ Rays

Charge transfer in PDI-derived systems studied with light-induced electron spin resonance

2007 ◽  
Vol 157 (8-9) ◽  
pp. 363-367 ◽  
Author(s):  
Henryk Manikowski ◽  
Danuta Wróbel ◽  
Kornelia Lewandowska ◽  
Andrzej Graja
Keyword(s):  
Electron Spin Resonance ◽  
Charge Transfer ◽  
Electron Spin ◽  
Spin Resonance

Electron spin resonance study of tert-butyl halides and carbon tetrachloride, neopentane and carbon tetrachloride binary mixtures irradiated at 77 °K

1969 ◽  
Vol 47 (2) ◽  
pp. 273-278 ◽  
Author(s):  
F. C. Thyrion
Keyword(s):  
Electron Spin Resonance ◽  
Carbon Tetrachloride ◽  
Binary Mixtures ◽  
Electron Spin ◽  
High Efficiency ◽  
Broad Band ◽  
Electron Spin Resonance Study ◽  
Tert Butyl ◽  
Spin Resonance ◽  
High Concentrations

Tert-butyl halides and carbon tetrachloride, neopentane and carbon tetrachloride binary mixtures were irradiated at 77 °K and electron spin resonance spectra were recorded at increasing temperatures until the radicals disappeared.Even at high concentrations of tert-butyl halides, the radicals obtained from CCl4 predominate, indicating that CCl4 has a high efficiency for electron capture. Maximum radical yields and the appearance of a narrow line spectrum with rising temperature were observed in (CH3)3C—X – CCl4 mixtures (X = Cl, Br, I) in concentration ranges where only a single phase exists. This spectrum consists of 17 lines which appear to belong to one odd-numbered spectrum (7 lines due to (CH3)2Ċ—X radical) and two even-numbered spectra (4 and 10 lines, the last being due to (CH3)3Ċ radical). The disappearance of the CCl4 broad band and the appearance of these radicals with increasing temperature can be interpreted as due to charge transfer from carbon tetrachloride cation to tert-butyl halide, facilitated by greater freedom of movement in the solid solutions. In contrast, neopentane and carbon tetrachloride mixtures do not display these features.

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