The roles of O2-, HO(.), and secondarily derived radicals in oxidation reactions catalyzed by vanadium salts.

@article{Liochev1991TheRO,
  title={The roles of O2-, HO(.), and secondarily derived radicals in oxidation reactions catalyzed by vanadium salts.},
  author={Stefan I. Liochev and Irwin Fridovich},
  journal={Archives of biochemistry and biophysics},
  year={1991},
  volume={291 2},
  pages={379-82}
}
V(IV) decomposed H2O2, with evolution of O2, in a free radical chain process involving O2- and HO(.). When V(IV) was limiting, the presence of V(V) augmented O2 evolution because it allowed production of additional V(IV) from the reduction of V(V) by O2-. Gradual addition of V(IV) increased the yield of O2 evolved, per V(IV) added, to greater than 1--a clear indication of a free radical chain reaction. Reductants such as ethanol, Hepes, and NADH imposed a phase of O2 consumption because of HO… CONTINUE READING