EFFECTS OF HIGH ENERGY RADIATIONS ON $alpha$$,$$beta$$,$$gamma$,/DELTA MALE/- TETRAPHENYLPORPHINE. II. FORMIC ACID, ACETIC ACID AND PROPIONIC ACID AS SOLVENTS

Journal Article · Mon Aug 20 00:00:00 EDT 1962 · Journal of the American Chemical Society (U.S.)

DOI:https://doi.org/10.1021/ja00875a010· OSTI ID:4791287

Szutka, A; Hazel, J F; McNabb, W M

The stability of porphyrins toward irradiations was studied. alpha , BETA , gamma , sigma -Tetraphenyl porphine was used as a model system. The compound was irradiated in formic acid, acetic acid, and propionic acid with 1l8 kv, 10 ma x-ray and Co/sup 60/ gamma rays and the eventual changes were followed spectrophotometrically. In contrast to the behavior in sirupy phosphoric acid and sulfuric acid, no significant changes were noted on irradiation with low dosages up to approximately 5000 r. The higher dosages produce changes, which were interpreted as destruction of the porphine ring. A mechanism involving one and/or two electron oxidation followed by disproportionation is suggested. Hydroxyl and perhydroxyl radicals as well as hydrogen peroxide and peracids seem to be responsible for the oxidation. (auth)

• Research Organization: Univ. of Detroit; Univ. of Pennsylvania, Philadelphia
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-029000
• OSTI ID: 4791287
• Journal Information: Journal of the American Chemical Society (U.S.), Vol. Vol: 84; Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ACETIC ACID
AROMATIC HYDROCARBONS
AROMATICS
COBALT 60
ELECTRONS
FORMIC ACID
FREE RADICALS
GAMMA SOURCES
HYDROGEN PEROXIDES
IRRADIATION
ORGANIC NITROGEN COMPOUNDS
OXIDATION
PHOSPHORIC ACID
PHOTOMETRY
PROPIONIC ACID
RADIATION DOSES
RADIATION EFFECTS
REACTION KINETICS
SOLVENTS
SPECTROSCOPY
STABILITY
SULFURIC ACID
X RADIATION