Citation:
Chu Gao-Sheng, Zhang Shu-Juan, Yao Si-De, Dou Da-Ying, Zhang Zhi-Cheng. Solvent Effects on the Oxidation of TyrOH by SO4●- Radical[J]. Acta Physico-Chimica Sinica,
;2002, 18(09): 812-816.
doi:
10.3866/PKU.WHXB20020909
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This work presents the study on the oxidation of TyrOH by SO4●- in water/ACN mixed media. Investigations show that the reaction mechanism between TyrOH and SO4●- does not change by the addition of ACN, whereas the kinetic behavior of the transient species produced is significantly affected. The decay of SO4●- decelerates with increasing volume fraction of ACN in mixed media whereas the decay of TyrO● accelerates. We suggest that the contrary effects of the solvent on the decay of both SO4●- and TyrO● are due to their different charges. The deceleration of the oxidation of TyrOH by SO4●- with the increase of ACN fraction may demonstrate that in the presence of organic solvents the redox potential of TyrO●/TyrOH is altered, which provides support for the suggestion that the redox potential of TyrO●/ TyrOH might be altered with their inclusion into peptides and proteins.
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