Different channels of ·OH radical reaction with tryptophanol in aqueous solutions: A pulse radiolysis study

Different channels of ·OH radical reaction with tryptophanol in aqueous solutions: A pulse... The pulse radiolysis technique has been employed to study the reaction of ·OH radical with tryptophanol (TPN). Reactions of specific one-electron oxidants like Br2· - and N3· and ·H atom were carried out to understand the contribution of different channels of · OH radical reaction with TPN. The studies were carried out in the pH range 3 to 10. One-electron oxidation of TPN (pH 3) produced radical cation absorbing at 570 nm. However, at higher pH, deprotonation of TPN cation radical takes place from N(1) position and indolyl radical absorbing at 520 nm with a p K a value of 3.6 is formed. Redox titration with TMPD, ABTS2- and MV2+ was performed to determine the total yield of oxidizing and reducing radicals produced during ·OH reaction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Different channels of ·OH radical reaction with tryptophanol in aqueous solutions: A pulse radiolysis study

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Publisher
Brill Academic Publishers
Copyright
Copyright © 2003 by VSP 2003
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856703322539672
Publisher site
See Article on Publisher Site

Abstract

The pulse radiolysis technique has been employed to study the reaction of ·OH radical with tryptophanol (TPN). Reactions of specific one-electron oxidants like Br2· - and N3· and ·H atom were carried out to understand the contribution of different channels of · OH radical reaction with TPN. The studies were carried out in the pH range 3 to 10. One-electron oxidation of TPN (pH 3) produced radical cation absorbing at 570 nm. However, at higher pH, deprotonation of TPN cation radical takes place from N(1) position and indolyl radical absorbing at 520 nm with a p K a value of 3.6 is formed. Redox titration with TMPD, ABTS2- and MV2+ was performed to determine the total yield of oxidizing and reducing radicals produced during ·OH reaction.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Oct 17, 2004

References

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