Free radicals generated during oxidation of green tea polyphenols: electron paramagnetic resonance spectroscopy combined with density functional theory calculations.

@article{Severino2009FreeRG,
  title={Free radicals generated during oxidation of green tea polyphenols: electron paramagnetic resonance spectroscopy combined with density functional theory calculations.},
  author={Joyce Ferreira Severino and Bernard Albert Goodman and Christopher W M Kay and Klaus Stolze and Daniel Tunega and Thomas G Reichenauer and Katharina Franziska Pirker},
  journal={Free radical biology & medicine},
  year={2009},
  volume={46 8},
  pages={1076-88}
}
Electron paramagnetic resonance spectroscopy and density functional theory calculations have been used to investigate the redox properties of the green tea polyphenols (GTPs) (-)-epigallocatechin gallate (EGCG), (-)-epigallocatechin (EGC), and (-)-epicatechin gallate (ECG). Aqueous extracts of green tea and these individual phenols were autoxidized at alkaline pH and oxidized by superoxide anion (O(2)(-)) radicals in dimethyl sulfoxide. Several new aspects of the free radical chemistry of GTPs… CONTINUE READING