Peroxynitrite-mediated oxidation of dichlorodihydrofluorescein and dihydrorhodamine.

  title={Peroxynitrite-mediated oxidation of dichlorodihydrofluorescein and dihydrorhodamine.},
  author={Jolanta Glebska and Willem H Koppenol},
  journal={Free radical biology & medicine},
  volume={35 6},
The oxidations of dichlorodihydrofluorescein and dihydrorhodamine by peroxynitrite are zero-order in the indicator between pH 3 and 10. The yield of the oxidized products, dichlorofluorescein and rhodamine, significantly increased at pH values>7, and the maximal molar yields were 0.47 +/- 0.04 mol rhodamine and 0.54 +/- 0.06 mol, dichlorofluorescein per mol peroxynitrite at pH 8.5. The increase in yield of oxidized products as a function of pH indicates that the peroxynitrite anion may form an… CONTINUE READING

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