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本文用自由基捕捉剂2,3,4,6-四甲基亚硝基苯(ND)及苯亚甲基叔丁基氮氧化合物(PBN)与ESR相结合的方法研究了C_nH_(2n+1)OH(n=1,2,…8)、(CH_3)_2CH(CH_2)_nOH(n=0,1,2)、CH_2=CHCH_2OH及C_6H_5CH_2OH等十三种醇与二苯甲酮的光化夺氢反应中的活泼自由基,结果表明: 1.用ND时,二苯酮分别夺取C_nH_(2n+1)OH、(CH_3)_2CH(CH_2)_nOH及RCH_2OH(R=CH_2=CH、C_6H_5)中α-C、叔-C及α-C上的氢,而捕捉到C_(n-1)H_(2n-1)CHOH、(CH_3)_2CH(CH_2)_nOH及RCHOH自由基。 2.用PBN时,捕捉的自由基与ND捕获的相同。
In this paper, the free radical scavenger 2,3,4,6-tetramethylnitrosobenzene (ND) and benzylidene tert-butyl oxynitride (PBN) combined with the ESR method to study the C_nH_ (2n + 1) Photochemical reaction of thirteen alcohols such as OH (n = 1,2,8), (CH_3) _2CH (CH_2) _nOH (n = 0,1,2), CH_2 = CHCH_2OH and C_6H_5CH_2OH with benzophenone The results showed that: 1. With ND, the benzophenones captured C_nH 2n + 1 OH, (CH 3) 2CH (CH 2) _nOH and RCH 2OH (R = CH_2 = CH, C_6H_5) (N-1) H_ (2n-1) CHOH, (CH_3) _2CH (CH_2) _nOH and RCHOH radicals in α-C, tert-C and α-C groups. 2. With PBN, the captured free radicals are the same as those captured by ND.