Absorption spectra of the radical ions of quinones: a pulse radiolysis study

Abstract

The formation of quinone radical ions was observed at room temperature using pulse radiolysis. The following quinones were investigated: p-benzoquinone, p-naphthoquinone, 5,8-dihydroxy-1,4-naphthoquinone, anthraquinone and 1,4-dihydroxyanthraquinone. The radical cations were produced in freon-113 solutions and the radical anions were produced in methanol solutions. The absorption spectra of the radical ions were found in the near-UV–VIS range. The spectra of the radical cations were blue shifted compared with the spectra of the corresponding radical anions.