Radiolytic studies of reduction and oxidation of aromatic systems
The radiolytic reduction and oxidation of aromatic systems have been investigated intensively. The formation of initial radicals and the kinetics of their reactions were characterized and followed by pulse radiolysis using time-resolved absorption spectrophotometry. The stable products created in the gamma radiolysis of aqueous solutions of aromatic halides were quantitatively determined with the use of high performance liquid chromatography (HPLC). In the reduction of bromine substituted benzene, phenol and benzoic acid, the bromide yield was determined in 1mM neutral and basic solutions at pH5 {approximately} 11 to be {approximately} 2.7. These results indicate that the reactions of e{sup {minus}}{sub aq} with bromine substituted aromatic compounds are essentially quantitative. Studies of the competitive reactions of e{sup {minus}}{sub aq} in benzene and phenoxide substituted with both bromine and chlorine show that halide elimination is controlled by the site of attack on the solute. Intramolecular electron transfer appears not to be important. The combination of time-resolved and steady-state studies provides complete and detailed information of radiolytic reduction and oxidation of halogenated aromatic and phenol systems.
- Research Organization:
- Notre Dame Univ., IN (USA)
- OSTI ID:
- 7006287
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400200 -- Inorganic
Organic
& Physical Chemistry
400600* -- Radiation Chemistry
AQUEOUS SOLUTIONS
AROMATICS
BROMINATED AROMATIC HYDROCARBONS
CALCULATION METHODS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED AROMATIC HYDROCARBONS
DATA
DATA ANALYSIS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FLUORINATED AROMATIC HYDROCARBONS
GAMMA RADIATION
HALOGENATED AROMATIC HYDROCARBONS
INFORMATION
IONIZING RADIATIONS
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
MIXTURES
NUMERICAL DATA
ORGANIC BROMINE COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
REACTION KINETICS
REDOX REACTIONS
SOLUTIONS