脂族酰基过氧化物在非极性溶剂中的热分解反应主要是自由基过程.但由于反应中生成的酰氧基自由基 RCOO·和其脱羧生成的烷基自由基 R·都是短寿命自由基,不能直接用 ESR检测.近年来发展的自旋捕获法,系利用亚硝基化合物如亚硝基叔丁烷(TNB)、亚硝基苯(NB)和 Nitrone 如 C-phenyl-N-t-butylnitrone(PBN)等所谓自旋捕获剂与化学反应中产生的短寿命自由基作用生成可供 ESR 研究的稳定自由基的方法. The thermal decomposition reaction of aliphatic acyl peroxide in apolar solvents is mainly a free radical process, but due to the acyl radicals RCOO generated during the reaction and the alkyl radicals R · formed by decarboxylation, they all have short lifetimes Free radicals, can not be directly detected by ESR. In recent years, the development of spin trapping method, the use of nitroso compounds such as nitroso-tert-butane (TNB), nitrosobenzene (NB) and Nitrone such as C-phenyl-Nt -butylnitrone (PBN) and other so-called spin traps and short-lived free radicals produced in the chemical reaction generate stable free radicals available for ESR studies.