Studies on mechanism of SO4 center dot- induced formation of radicals containing sulphur three-electron bond

Authors
Xu, YP Li, QX Song, QH Sun, HH Yao, SD Yu, SQ Chen, CX Ma, XX
Citation
Yp. Xu et al., Studies on mechanism of SO4 center dot- induced formation of radicals containing sulphur three-electron bond, CHEM J CH U, 20(5), 1999, pp. 731-735
Citations number
12
Categorie Soggetti
Chemistry
Journal title
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN journal
02510790 → ACNP
Volume
20
Issue
5
Year of publication
1999
Pages
731 - 735
Database
ISI
SICI code
0251-0790(199905)20:5<731:SOMOSC>2.0.ZU;2-M
Abstract
The oxidation mechanism of D-methioine(Met), L-methioine-methyl ester (MME) and Met-Met dipeptides by SO4.- was investigated by using 248 nm laser pho tolysis of K2S2O8 and absorption spectrum. The presence of three electron-r adical cation intermediated [S therefore S](+), [S therefore N](+) and [S t herefore O] were observed by transient absorption spectra. The results are compared to those of pulse radiolysis. A detail oxidation mechanism of sulp hur containing amino acids was proposed.