Abstract
The excited states of some complexes between polycyclic aromatic hydrocarbons and chloranil dissolved in polymethylmethacrylate have been studied with a modulation excitation spectrophotometer. New bands similar to but slightly shifted in position as compared to the T 1–T 3 transition of the aromatic hydrocarbon are observed. Regressional analysis points to the new bands arising from transitions from a level in the chloranil to the T 3 level of the hydrocarbon. An enhancement of the T 1–T 3 bands of the hydrocarbon occurs in the complex. Other bands are also seen which are believed to be due to new levels of the complex which cannot be identified with local levels of the hydrocarbon or chloranil.
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