Approximate values of the rate constants of radiation reaction of hydrogen atoms and hydroxyl radicals in aqueous solutions

1965 ◽  
Vol 14 (3) ◽  
pp. 389-395
Author(s):  
A. K. Pikaev ◽  
P. Ya. Glazunov ◽  
Vikt I. Spitsyn
Keyword(s):  
Aqueous Solutions ◽  
Hydroxyl Radicals ◽  
Rate Constants ◽  
Radiation Reaction ◽  
Hydrogen Atoms

Rate constants for reaction of hydrogen atoms in aqueous solutions

1971 ◽  
Vol 75 (4) ◽  
pp. 449-454 ◽  
Author(s):  
Robert H. Schuler ◽  
Pedatsur Neta ◽  
G. R. Holdren
Keyword(s):  
Aqueous Solutions ◽  
Rate Constants ◽  
Hydrogen Atoms

Electron spin resonance of spin-trapped radicals of amines and polyamines. Hydroxyl radical reactions in aqueous solutions and γ-radiolysis in the solid state

1982 ◽  
Vol 60 (12) ◽  
pp. 1493-1500 ◽  
Author(s):  
Magdi M. Mossoba ◽  
Ionel Rosenthal ◽  
Peter Riesz
Keyword(s):  
Aqueous Solutions ◽  
Hydroxyl Radicals ◽  
Room Temperature ◽  
Spin Trap ◽  
Alkyl Chain ◽  
Spin Trapping ◽  
Radical Reactions ◽  
Hydrogen Atoms ◽  
Protonated Amino Group ◽  
Spin Resonance

The reactions of hydroxyl radicals with methylamine, dimethylamine, trimethylamine, diethylamine, sec-butylamine, ethylenediamine, 1,3-diaminopropane, putrescine, cadaverine, 1,7-diaminoheptane, ornithine, spermidine, spermine, agmatine, and arcaine in aqueous solutions have been investigated by spin-trapping and esr. Hydroxyl radicals were generated by the uv photolysis of H2O2 and 2-methyl-2-nitrosopropane (MNP) was used as the spin-trap. The effects of ionizing radiation on the same polyamines in the polycrystalline state were also investigated. The free radicals produced by γ-radiolysis of these solids at room temperature in the absence of air were identified by dissolution in aqueous solutions of MNP. The predominant reaction of [Formula: see text] with amines and polyamines below pH 7 was the abstraction of hydrogen atoms from a carbon that is not adjacent to the protonated amino group. For agmatine and arcaine which contain guanidinium groups abstraction occurred from the α-CH. Dimethylamine was oxidized to the dimethylnitroxyl radical by H2O2 in the dark. γ-Radiolysis of polyamines in the polycrystalline state generated radicals due to H-abstraction from either the α-CH or from a carbon atom in the middle of the alkyl chain. The deamination radical was obtained from ornithine.

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