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本文用具立体阻碍的自旋捕捉剂2,4,6,-三- 特丁基亚硝基苯(TBN)与ESR相结合的方法,研究了七种醚及四种酚与二苯甲酮光化夺氢反应中产生的活泼自由基。从ESR谱的超精细结构确证,处于激发态的二苯甲酮是夺取醚中接于氧的a-c上的氢; φ_2CO+ROR→φ_2COH+R＇CHOR而且只是其中的R＇CHOR可与TBN形成(Ⅰ)型及(Ⅱ)型两种自由基加合物:对于苯酚衍生物而言,二苯甲酮却是夺取酚羟基中的质子而形成,它与TBN也形成(Ⅰ)型及(Ⅱ)型两种自由基加合物。
In this paper, three kinds of steric hindrance of the spin trapping agent 2,4,6, - tris-butyl nitrosobenzene (TBN) and ESR combined with the method of seven kinds of ether and four phenol and benzophenone light Seize hydrogen generated by the reaction of lively free radicals. From the hyperfine structure of the ESR spectrum, benzophenone in the excited state is the hydrogen that abstracts the ac on the ac that is bound to oxygen in the ether; φ_2CO + ROR → φ_2COH + R’CHOR and only R’CHOR can form with TBN (Ⅰ) type and (Ⅱ) type two free radical adducts: For the phenol derivatives, benzophenone is to capture the proton in the phenolic hydroxyl group formed, it also forms with TBN (Ⅰ) and ( Ⅱ) type two free radical adducts.