Abstract
AbstractIt is shown by means of electrochemical experiments that the chemiluminescent electron‐transfer reaction between perylene radical anions and tri‐p‐tolylamine radical cations and between perylene radical cations and benzil radical anions, respectively, are energy‐deficient, i. e. the reaction enthalpy is smaller than the energy of the lowest excited singlet state of perylene, the fluorescence emission of which is observed. This result implies the formation of perylene molecules in the triplet state in the course of the electron‐transfer reaction with subsequent triplet‐triplet annihilation yielding perylene molecules in the excited singlet state. The triplet mechanism is confirmed by the analysis of the light intensity‐time curves.
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