Radiation chemistry of nitrogen and sulfur heterocyclics
The gamma radiolysis of nitrogen and sulfur heterocyclics having one or more nitrogen or sulfur atoms in five- and six-membered rings was studied. G values are given for the major gaseous products identified by gas chromatography for the radiolyses of pyrrole, pyrazole, imidazole, 1,2,4-triazole, tetrazoic, pyrazine, pyrimidine 1,3,5-triazine, benzotriazole, thiazole, isothiazole, and thiophene. The principal gaseous product formed during the gamma -radiation of five- and six-membered nitrogen heterocyclics was hydrogen except that compounds having two adjacent nitrogen atoms in the ring produced large amounts of nitrogen and other gaseous products. When the N atoms are separated by carbon atoms, no nitrogen gas is produced and the G values for gas production are very low. Thiophene has greater stability to radiation than pyrrole as far as gas production is concerned. However, the introduction of a second heteroatom (nitrogen in the case of thiazole and isothiazole) in the five-membered ring containing sulfur (thiophene) does not change the radiosensitivity of the molecule. The nature of the free radicals formed by the irradiation of tetrazole at low doses (1 x 10/sup 18/ eV/g) was studied by ESR. Radical species of at least two types are produced. (auth)
- Research Organization:
- Frankford Arsenal, Philadelphia
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-000158
- OSTI ID:
- 4425192
- Journal Information:
- Radiat. Res., v. 56, no. 1, pp. 71-82, Journal Name: Radiat. Res., v. 56, no. 1, pp. 71-82; ISSN RAREA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
*IMIDAZOLES-- RADIOLYSIS
*ORGANIC NITROGEN COMPOUNDS-- RADIOLYSIS
*ORGANIC SULFUR COMPOUNDS-- RADIOLYSIS
*PYRAZINES-- RADIOLYSIS
*PYRAZOLES-- RADIOLYSIS
*PYRIMIDINES-- RADIOLYSIS
*PYRROLES-- RADIOLYSIS
*TETRAZOLES-- RADIOLYSIS
*THIAZOLES-- RADIOLYSIS
*THIOPHENE-- RADIOLYSIS
*TRIAZINES-- RADIOLYSIS
*TRIAZOLES-- RADIOLYSIS
ELECTRON SPIN RESONANCE
GAMMA RADIATION
N40300* --Chemistry--Radiation Chemistry
PHOTON BEAMS
RADIATION CHEMISTRY
RADICALS