Molecular Ions in Radiation Chemistry. II. Aromatic-Hydrocarbon Cations in CCl4 at 77°K

Abstract
Solutions of aromatic hydrocarbons in a polycrystalline matrix of CCl4 at 77°K have been γ irradiated and well‐resolved optical absorption spectra measured in the interval 270–2000 mμ. All spectra characteristic of solute are attributed to molecular monopositive ions of benzene, toluene, bi‐ and triphenyl methanes, biphenyl, o‐, m‐, and p‐terphenyl, bi‐, tri‐, and tetraphenylethylene, biphenylacetylene, naphthalene, anthracene, phenanthrene, stilbene, diphenylstibene, and 1,3,5‐triphenylbenzene. Resonance charge transfer from CCl4+ to CCl4, terminated by transfer from CCl4+ to solute, is postulated.

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