用纳秒级脉冲辐解动态吸收光谱法研究了Ｂｒ２－自由基引发Ｎ－（Ｎ－二异丙氧基磷酰化甲硫氨酰）色氨酸甲酯的氧化和电子转移过程，结果表明：Ｂｒ２－自由基同步氧化Ｎα－磷酰化二肽中的甲硫氨酸和色氨酸部位，并发生由色氨酸向含硫三电子键自由基的分子内电子转移过程，求算了有关动力学参数，推导了氧化和电子转移机理 The oxidation and electron transfer of Br2-free methyltryptophan methyl ester (N- (N-diisopropoxyphosphorylmethionyl) tryptophan methyl ester) was studied by nanosecond pulsed radiolysis dynamic absorption spectroscopy : Br2-free radical synchronously oxidizes the methionine and tryptophan sites in the Nα-phosphorylated dipeptide and undergoes an intramolecular electron transfer process from tryptophan to sulfur-containing tri-electron bond free radicals For kinetic parameters, the oxidation and electron transfer mechanisms were deduced