ESR study of linear aliphatic oligoesters under γ-irradiation. I. Paramagnetic species produced in the material by irradiation at 77°K

Autor: Kenichi Shinohara, Yoshimasa Hama, Koji Mimura, Toshitami Ooi
Rok vydání: 1976
Předmět:
Zdroj: Journal of Polymer Science: Polymer Chemistry Edition. 14:813-824
ISSN: 1542-9369
0360-6376
DOI: 10.1002/pol.1976.170140403
Popis: Paramagnetic species produced in a series of linear aliphatic oligoesters by γ-irradiation at 77°K was investigated by an ESR method. A predominant doublet observed immediately after γ-irradiation, which has hyperfine splitting of 20–23 gauss, is attributed to a radical anion III. Slight decay of this radical anion is observed by illuminating the sample with visible light at 77°K. A small amount of the radical anion is converted to double triplet, which is assigned to (ES)CHCH2 (where ES denotes the ester group), from the result of heat treatment. The conformational angles for the two β-protons in the (6,2) oligoester are determined to be θ1 = θ2 = 30°.
Databáze: OpenAIRE
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