CIDEP Study of Durosemiquinone Radical in Various Solvents

Article abstract of DOI:10.1246/bcsj.56.46

F-pair polarization and triplet mechanism (TM) polarization of durosemiquinone radical produced by light irradiation of duroquinone-phenol systems were discriminated at 260 K in a simple way based on the analysis of the enhancement factors in the steady-state method with intermittent light irradiation.Both polarizations are not so sensitive to viscosity or polarity of solvents.TM enhancement factor is nearly constant (-0.8) in wide range of viscosity (2.5-25 cP, 1 cP=0.001 Pa s).F-pair polarization is suppressed in some extent by halogenated solvents while TM polarization is not affected by such solvents.