Free radicals in dicarboxylic acids: an e.s.r. study of gamma-irradiated single crystals of glutaric acid at 77 K.
Free radicals in dicarboxylic acids: an e.s.r. study of gamma-irradiated single crystals of glutaric acid at 77 K.
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二羧酸中的自由基：e.s.r.
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
T. Melø
中科院分区：
文献类型：
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作者：
R. Bergene;A. Minegishi;P. Riesz;T. Melø
利用电子自旋共振技术研究了γ辐射诱导的戊二酸单晶中77 ~ 300 K温度范围内的自由基。三个不同的自由基稳定在77k。脱羧自由基是优势种，其他两个自由基分配到阴离子和取代的乙酰基sigma-自由基。当晶体温度升高时，这些自由基消失，而先前研究的室温自由基出现。为了阐明各种自由基的结构，将esr数据与半经验INDO-MO计算结果进行了比较。
Electron spin resonance techniques were used to study the gamma-radiation-induced free radicals in single crystals of glutaric acid in the temperature range from 77 K to 300 K. Three different radicals are stabilized at 77 K. The decarboxylation radical is the dominant species and the other two radicals are assigned to the anion and to the substituted acetyl sigma-radical. When the temperature of the crystal is raised, these radicals disappear and the previously studied room temperature radicals appear. E.S.R.-data and the results from semi-empirical INDO-MO calculations were compared in order to elucidate the structures of the various radicals.