Free radicals trapped in methyl alpha-D-mannopyranoside X-irradiated at 77 K: an ESR/ENDOR study

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Radiat. Res.; (United States)

DOI:https://doi.org/10.2307/3577076· OSTI ID:5840363

Bernhard, W A; Huttermann, J; Close, D M; Mercer, K R

Four free radicals are trapped in methyl alpha-D-mannopyranoside X-irradiated and maintained at 77 K. All four have been identified, with high confidence levels, using ESR and ENDOR spectroscopy. One, an alkoxy radical located at O4, is characterized by a gmax of 2.059, an isotropic beta hydrogen hyperfine coupling (hfc) of 98 MHz, and small interactions due to gamma or delta hydrogens. The second, a secondary dioxyalkyl radical due to loss of hydrogen from C1 is characterized by one beta hfc with an isotropic component of 19.03 MHz. The third, a secondary hydroxyalkyl radical due to loss of hydrogen from C2 is characterized by two nonexchangeable hydrogens with isotropic beta interactions of 22.45 and 6.44 MHz and one exchangeable hydrogen with an isotropic beta interaction of 9.88 MHz. The fourth is a .CH2OR radical that is formed by the net loss of hydrogen from the methyl group.

• Research Organization: Univ. of Rochester, NY
• OSTI ID: 5840363
• Journal Information: Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 112:1; ISSN RAREA
• Country of Publication: United States
• Language: English

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560120* -- Radiation Effects on Biochemicals
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CARBOHYDRATES
CHEMICAL RADIATION EFFECTS
CHEMISTRY
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
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IONIZING RADIATIONS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RESONANCE
X RADIATION