Abstract
For the rod-shaped bichromophoric comppound 1-phenyl-4-(1-naphthylemthylene) piperidine a systematic study of the non-radiative decay processes of the charge transfer state has been carried out by means of single photon timing, phosphorescence and transient absorption measurements and laser-induced optoacoustic spectroscopy. These results can tentatively be explained by a significant admixture of the less polar locally excited state configuration in the wave function of the emissive charge transfer state, especially in the low polarity region. Due to this configuration interaction, an efficient radiationless decay channel via twisting of the ethylene bond in the locally excited state of the vinylnaphthalene chromophore becomes accessible for the charge transfer state.
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