THE GAMMA RADIOLYSIS OF AQUEOUS AND ALCOHOLIC SOLUTIONS OF ORANGE IV. Thesis

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1963

OSTI ID:4103722

Denio, A A

The decolorization of deaerated aqueous solutions of Orange IV is the result of H atom and hydroxyl radical attacks. The H atoms are believed to add to the azo or amine N atoms and the hydroxyl radicals probably add to the aromatic C atoms. The decolorization when O is present initially is attributed to hydroxyl and hydroperoxyl radical additions until the O is consumed. The yields of the decolorization reactions in water are very low compared to the yields of H atoms and hydroxyl radicals formed. It was estimated that 10 to 14 radicals are required for each dye molecule decolorized. The dye molecule may serve as a site for the recombination of a H atom and a hydroxyl radical. Some funther oxidation appears after irradiation and is attributed to the hydrogen peroxide formed with a yield of G = 0.67. The decolorization of deaerated methanolic solutions of Orange IV results from its reduction to the hydrazo derivatives by the addition of H atoms, methylol, methyl, and hydroxyl radicals. The decolorization reaction in methanol containing O is inhibited until the O is consumed. Both reactions are discussed. The monoazo dye Orange I behaves in a similar manner to Orange IV when deaerated methanolic solutions are irradiated. The radical additions to the azo linkage apparently yield the derivatives of sodium sulfanilate and 4-amino-1-maphthol. The results obtained in ethanolic solutions are apparently analogous to those in methanolic solutions. The efficiency of the decolorization process is again high and indicates essentially 100% addition of the radicals to the azo linkage. The use of ionizing radiation in an organic synthesis is illustrated by this work. The principal limitation to this method is the mixture of products obtained from the random addition of the free radicals formed from the solvent. The process is easily performed and proceeds with a very high efficiency. (M.P.G.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-012249
• OSTI ID: 4103722
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ALCOHOLS
AMINES
ANIONS
AROMATICS
ATOMS
BOOKS
CARBON
CHEMICALS
CHEMISTRY
COLOR
CONFIGURATION
DECOMPOSITION
DIAGRAMS
DYES
EFFICIENCY
FREE RADICALS
GAMMA RADIATION
GASES
HYDROGEN
HYDROGEN PEROXIDES
HYDROXIDES
IONIZATION
IRRADIATION
MEASURED VALUES
METHYL RADICALS
MIXING
MOLECULES
NAPHTHALENE
NITROGEN
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN
PEROXIDES
PREPARATION
QUALITATIVE ANALYSIS
RADIATION CHEMISTRY
RADIATIONS
RADIOLYSIS
SODIUM COMPOUNDS
SOLUTIONS
SULFONIC ACIDS
TRACE AMOUNTS
USES
VARIATIONS
WATER