The CIDEP spectra of photolyzed p-benzosemiquinone radical in different media have been studied experimentally with the highly time resolved ESR spectrometer. In p-benzoquinone solution with ethylene glycol as solvent, emission lines from PBQH and R(OH)2 were obtained. With ethylene glycol and water mixture as solvent, the spectrum mainly contained six lines from PBQH. With the addition of some surfactants (TX-100 and AOT) and increase of their concentration, the strength of PBOH lines decreased gradually to such an extent as to disappear at last. At the same time, lines from PBQ appeared in the spectrum and increased gradually. On the basis of special properties of the microenvironment in which radicals lied, a polarization transference mechanism and some related physical chemical properties were discussed to explain these experimental results.

Key words: MICELLE, ETHANEDIOL, BENZOQUINONE, ELECTRON SPIN RESONANCE, POLARIZATION, SEMIQUINONE, PHOTOLYSIS, FREE RADICALS