摘要
运用２４８ｎｍ激光光解瞬态吸收光谱，研究了ＳＯ４·－单电子氧化Ｄ－甲硫氨酸（Ｍｅｔ）、Ｌ－甲硫氨酸甲酯（ＭＭＥ）和甲硫氨酰甲硫氨酸（Ｍｅｔ－Ｍｅｔ）的反应过程．观察到反应过程中生成３种含硫三电子键自由基中间体，［Ｓ∴Ｓ］＋、［Ｓ∴Ｎ］＋和［Ｓ∴Ｏ］。
The oxidation mechanism of D methioine(Met), L methioine methyl ester(MME) and Met Met dipeptides by SO 4 ·- was investigated by using 248 nm laser photolysis of K 2S 2O 8 and absorption spectrum. The presence of three electron radical cation intermediated + , + and were observed by transient absorption spectra. The results are compared to those of pulse radiolysis. A detail oxidation mechanism of sulphur containing amino acids was proposed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第5期731-735,共5页
Chemical Journal of Chinese Universities
关键词
激光光解
硫
氨基酸
三电子键自由基
自由基
Laser photolysis, Sulphur containing amino acids, Reaction mechanism, Three electron bond
