Abstract
Investigations by the method of limited configuration interaction (ASMO-CI) upon some classes of nonalternant hydrocarbons show that the excitation of the molecules to the fluorescent and to some higher singlet and triplet states is accompanied with considerable intramolecular charge transfer leading to recharge of the cycles with an odd number of carbon atoms. It is shown that the change of the dipole moments and of some values ¦L¦ characterizing the electron structure in transition from ground to fluorescent state ¦ΔLV¦, respectively from ground to phosphorescent state ¦ΔLT¦, satisfy the inequalities: ¦ΔLV¦ > ¦ΔLT¦. It follows that the fluorescent state differs more from the ground state in its electron structure and physical properties than does the phosphorescent state.
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