Höhere Triplettanregungszustände von Fluoren, Carbazol und Benzologen: CNDO-CI-Berechnungen und Triplett-Triplett-Absorptionsmessungen

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Abstract
CNDO-Cl calculations of triplet-triplet excitation energies on fluorene, carbazole and their monobenzologues are in good agreement with the results from triplet-triplet absorption measurements. An assignment of the observed triplet data is given. It is shown that the quantum-chemical treatment should be useful in cases where the experimental data are difficult to obtain.