Studies on Mechanism of SO4·-Induced Formation ofRadicals Containing Sulphur Three electron Bond

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (5): 731.

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Studies on Mechanism of SO_4·-Induced Formation ofRadicals Containing Sulphur Three electron Bond

XU Ye-Ping¹, LI Quan-Xin¹, SONG Qin-Hua¹, SUN Hai-Hong¹, YAO Si-De², YU Shu-Qin¹, CHEN Cong-Xiang¹, MA Xing-Xiao¹

1. Department of Chemical Physics, University of Science Technology of China, Hefei, 230026;
2. Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai, 201800

Online:1999-05-24 Published:1999-05-24

Abstract

Abstract: The oxidation mechanism of D-methioine(Met), L-methioine-methyl ester(MME) and Met-Met dipeptides by SO_4·-was investigated by using 248nm laser photolysis of K₂S₂O₈and absorption spectrum. The presence of three electron radical cation intermediated [S∴S]⁺、[S∴N]⁺and [S∴O] were observed by transient absorption spectra. The results are compared to those of pulse radiolysis. Adetail oxidation mechanism of sulphur containing amino acids was proposed.

Key words: Laser photolysis, Sulphur containing amino acids, Reaction mechanism, Three electron bond

CLC Number:

O643.12

TrendMD:

XU Ye-Ping, LI Quan-Xin, SONG Qin-Hua, SUN Hai-Hong, YAO Si-De, YU Shu-Qin, CHEN Cong-Xiang, MA Xing-Xiao. Studies on Mechanism of SO_4·-Induced Formation ofRadicals Containing Sulphur Three electron Bond[J]. Chem. J. Chinese Universities, 1999, 20(5): 731.

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Studies on Mechanism of SO_4·-Induced Formation ofRadicals Containing Sulphur Three electron Bond

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