苯甲醛的光解与其在放置过程中的自氧化引发机理密切相关,因此确定光解过程的主要中间产物有重要意义。自氧化的全过程比较复杂,但单纯的光解本身显然相对简单一些。本文用自旋捕捉-ESR技术研究了苯甲醛及与其相类似的对溴苯甲醛在紫外和可见光作用下生成的活泼中间体,并讨论了在本文实验条件下的光解初级过程。 苯甲醛为色谱纯样品,对溴苯甲醛和二苯酮经两次重结晶提纯,溶剂苯经重蒸馏后 Photolysis of benzaldehyde is closely related to its auto-oxidation initiation mechanism during placement. Therefore, it is of great significance to determine the main intermediate of the photolysis process. The whole process of self-oxidation is more complicated, but pure photolysis itself is obviously relatively simpler. In this paper, the spin-trap-ESR technique was used to study the active intermediates of benzaldehyde and its corresponding p-bromobenzaldehyde under ultraviolet and visible light. The primary photolysis process under the experimental conditions was discussed. Benzaldehyde is a pure chromatographic sample, the bromobenzaldehyde and benzophenone are purified twice by recrystallization, the solvent benzene is subjected to heavy distillation