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自旋捕捉剂能将反应过程中生成的瞬态自由基变成较稳定的自旋加合物.通过对自旋加合物的 ESR 研究可以提供有关反应中间过程的信息.因此它对研究高分子聚合和降解过程、催化反应及某些有机反应的自由基历程很有价值,引起人们广泛的重视.应用最多的捕捉剂是亚硝基特丁烷(t-BuNO).t-BuNO 在固态时以二聚体形式存在,而在溶液中则会发生离解平衡反应:
The spin trapping agent can change the transient free radical generated during the reaction to a more stable spin adduct.The ESR study of the spin adduct can provide information about the intermediate process of the reaction.Therefore, Molecular polymerization and degradation process, catalytic reaction and some organic reactions of free radical process is of great value, aroused widespread attention.The most widely used capture agent is nitroso-butane (t-BuNO) .t-BuNO in the solid When the dimer exists, and in the solution will occur dissociation equilibrium reaction: