Temperaturabhängigkeit der Absorption und Fluoreszenz von Tetracen und Perylen/Tetracen in Flüssigkristallen / The Temperature Dependence of Absorption and Fluorescence of Tetracene and PeryleneI Tetracene in Liquid Crystals

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Abstract
At the clearing point the extinction and the fluorescence intensity of pure tetracene mixtures decrease rapidly. This is explained as due to a forced scattering in the liquid crystal phase. In the binary system perylene/tetracene the polarisation of absorption and emission in the wavelength region of tetracene is inverted and the corresponding fluorescence decay time increases with temperature

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