Related Experiment Videos
Fenton chemistry: an introduction
1Gray Laboratory Cancer Research Trust, Mount Vernon Hospital, Northwood, Middlesex, United Kingdom.
Radiation Research
|May 1, 1996
Summary
Fenton chemistry, initially observed with tartaric acid, involves iron and hydrogen peroxide. Modern research highlights its role in oxidative stress, but hypohalous acids may be more significant oxidants than hydrogen peroxide.
Area of Science:
- Chemistry
- Biochemistry
- Oxidative Stress
Background:
- Fenton chemistry, discovered in 1876, involves reactions between ferrous salts and hydrogen peroxide.
- Early research identified dihydroxymaleic acid as a product and proposed hydroxyl radicals.
- Later work suggested superoxide's role in the catalytic cycle of iron-catalyzed oxidations.
Purpose of the Study:
- To review the historical development and mechanistic understanding of Fenton chemistry.
- To highlight the ongoing debate regarding hydroxyl radicals versus metal/oxo intermediates.
- To emphasize the potential significance of hypohalous acids in Fenton-like reactions.
Main Methods:
- Historical literature review of key publications on Fenton chemistry.
- Analysis of proposed reaction mechanisms involving iron, hydrogen peroxide, and superoxide.
- Discussion of cellular oxidative stress and the role of Fenton chemistry.
Main Results:
- The Fenton reaction has a long history, with evolving mechanistic interpretations.
- Superoxide's role in regenerating the iron catalyst is a key aspect.
- Current understanding still faces questions regarding specific reactive species.
Conclusions:
- While hydroxyl radicals and superoxide are central to current models of Fenton chemistry and oxidative stress, alternative oxidants warrant attention.
- Fenton chemistry involving hypohalous acids may be underestimated and deserves further investigation.
- Re-evaluating the role of hypohalous acids could broaden the understanding of oxidative processes.