论文信息 - ESR of gamma irradiated single crystals of cholesteryl acetate and cholesteryl chloroformate

ESR of gamma irradiated single crystals of cholesteryl acetate and cholesteryl chloroformate

Cholesteryl acetate and cholesteryl chloroformate compounds have been irradiated with 60Co-γ rays at room temperatures. The irradiated samples have been examined for paramagnetic resonance, and the observed spectra in several cases have been identified with specific radicals. The results in each case have been considered in relation to the present knowledge of the radiation chemistry of the compound. The single crystals have been investigated between 120 and 300 K. The spectra are found to be temperature independent and radiation damage centers are attributed to ĊHCH2 radical for cholesteryl acetate and ĊH3 and ĊHCH2 CH2 CH2 radicals for cholesteryl chloroformate.

[1] I. W. Levin,et al. Cholesterol-lipid interactions: An infrared and raman spectroscopic study of the carbonyl stretching mode region of 1,2-dipalmitoyl phosphatidylcholine bilayers , 1980 .

[2] L. J. Lis,et al. Structural studies of cholesteryl acetate - phosphatidylcholine complexes , 1977 .

[3] D. A. Long,et al. A Raman spectroscopic study of the effect of hydrocarbon chain length and chain unsaturation on lecithin‐cholesterol interaction , 1976 .

[4] R. H. Schuler,et al. ELECTRON SPIN RESONANCE STUDIES OF TRANSIENT ALKYL RADICALS , 1963 .

[5] B. Smaller,et al. Paramagnetic Species Produced by γ Irradiation of Organic Compounds , 1958 .

[6] M. Gotoh,et al. Phase Transitions and Solid Polymorphis of Cholesteryl Acetate , 1977 .

[7] R. Schwartz,et al. ESR Studies of Radical Fragments Produced in X‐Irradiated Disodium Succinate , 1969 .

[8] W. T. Dixon,et al. 701. Electron spin resonance studies of oxidation. Part II. Aliphatic acids and substituted acids , 1964 .

[9] C. Heller. Electron Spin Resonance and Internal Rotation of the Methyl Group in the CH3Ċ(COOH)2 Radical , 1962 .