Polarized absorption spectra of aromatic radicals in stretched polymer films. Part 6.—Radical ions of some aromatic molecules

Abstract

By use of the stretched polymer-film technique combined with γ-irradiation, polarized absorption spectra of the radical anions and cations of perylene, pyrene, naphthalene, phenanthrene and biphenyl have been studied. The polarized absorption spectra have been resolved into components with transition moments polarized parallel to and perpendicular to the molecular long axis. The pairing relation has been examined between the electronic transitions of the radical anion and the corresponding cation.