Polarized Absorption Spectra of Aromatic Radicals in Stretched Polymer Film. IV. Radical Ions of 9-Substituted Anthracenes

Abstract

Radical ions of some 9-substituted anthracene derivatives have been prepared in polymer film by γ-irradiation at 77 K. By use of the polarized absorption spectra of these radical ions, the absorption spectra have been resolved into two components (resolved spectra), the transition moments of which are polarized parallel to the molecular long and short axes, respectively. Correlation of the characteristic absorption bands is discussed briefly.