Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
On the Emission of Excited Complexes Formed between Condensed Aromatic Hydrocarbons and Aliphatic Amines
Akira Nakajima
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1969 Volume 42 Issue 12 Pages 3409-3414

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Abstract

Anomalous emission observed at long wavelengths in the systems of condensed aromatic hydrocarbons and aliphatic tertiary amines has been studied. The anthracene-tri-n-butylamine system has been dealt with in detail. On the basis of the absorption spectrum, the temperature dependence of the long-wavelength emission and the relation between the quenching of the hydrocarbon fluorescence and the intensity of the long-wavelength emission, it has been concluded that this emission originates from the excited complex formed between an excited hydrocarbon and an amine. The interaction involved in excited-complex formation is of a charge-transfer type. This was confirmed by the correlation of the wavelengths of the excited-complex emission with the ionization potentials of amines and the electron affinities of aromatic hydrocarbons and by the large dipole moment of the excited complex.

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