The effect of inclusion in beta-cyclodextrin on the chemistry of peroxides: Reactions of radicals with beta-cyclodextrin

被引：15

作者：

Lehmann, MN ^{[1
]}

Bakker, MG ^{[1
]}

Patel, H ^{[1
]}

Partin, ML ^{[1
]}

Dormady, SJ ^{[1
]}

机构：

[1] UNIV ALABAMA,DEPT CHEM,TUSCALOOSA,AL 35487

来源：

JOURNAL OF INCLUSION PHENOMENA AND MOLECULAR RECOGNITION IN CHEMISTRY | 1995年 / 23卷 / 02期

关键词：

beta-cyclodextrin radicals; benzoyl peroxide; cumene hydroperoxide; t-butyl peroxide; peroxide stabilization; electron paramagnetic resonance (EPR);

D O I：

10.1007/BF00707888

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Studies by electron paramagnetic resonance (EPR), differential scanning calorimetry, thermogravimetric analysis, HPLC and NMR showed that radicals produced by thermolysis and photolysis of benzoyl peroxide, t-butyl peroxide and cumene hydroperoxide included in beta-cyclodextrin (beta-CD), undergo significant reaction with the beta-CD. The formation of beta-CD radicals was observed by EPR. Products formed by addition of radicals to beta-CD were also observed. Such host:guest radical reactions explain the reported stabilization of peroxides, found with beta-CD inclusion, as being primarily due to the interruption of chain reactions by trapping of the chain carriers. A small increase in activation barrier for cleavage of the included peroxide in beta-CD was also observed.

引用

收藏

页码：99 / 117

页数：19

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