Photosensitized generation of superoxide radical in aprotic solvents: an EPR and spin trapping study.

@article{Reszka1993PhotosensitizedGO,
  title={Photosensitized generation of superoxide radical in aprotic solvents: an EPR and spin trapping study.},
  author={Krzysztof J Reszka and Piotr Bilski and Robert H Sik and Colin F. Chignell},
  journal={Free radical research communications},
  year={1993},
  volume={19 Suppl 1},
  pages={S33-44}
}
The UV or visible irradiation of pigments such as curcumin, anthralin, benzanthrone, 1,8-dihydroxyanthraquinone, and rose bengal- or eosine-complexes with cationic surfactants in aerated aprotic solvents, such as benzene, toluene, acetone, n-heptane, cyclohexane, in the presence of 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) generates EPR spectra with hyperfine splitting constants (hfsc's) aN = 12.75 G, a beta H = 10.50 G, a gamma H = 1.26 G in toluene, 12.83 G, 10.64 G, 1.24 G in benzene, 12.75 G… CONTINUE READING