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自由基正离子通常采用光解、电解、射线辐照或单电子转移氧化还原反应方式产生,用超声波作为自由基正离子的生成方法迄今尚未见报道。Reize等研究发现,氯代甲烷经超声辐射可发生C—Cl键断裂,并以自旋捕获法鉴定了所生成的自由基中间体。他们还进一步发现,H_2O经超声辐射处理也可发生H—O键断裂,生成·OH自由基,并用DMPO(5,5-dimethyl-1-pyrroli-ne-1-oxide)作为自旋捕获剂捕获并鉴定了所生成的羟基自由基。本文
Free radical cations are usually generated by photolysis, electrolysis, radiation or single electron transfer redox reaction. The generation of free radical cations by using ultrasonic waves has not been reported so far. Reize et al. Found that C-Cl bond cleavage occurred after ultrasonic irradiation of methyl chloride, and the generated free radical intermediates were identified by spin-trapping method. They further found that H-O bond cleavage can also occur in the H 2 O treated with ultrasonic radiation to generate · OH free radicals and capture with DMPO (5,5-dimethyl-1-pyrroli- ne-1-oxide) The resulting hydroxyl radicals were identified. This article