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Influence of the solvent matrix on the overlapping of the absorption and emission bands of solute fluorescent dyes

  • Photophysics, Laser Chemistry
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Abstract

It has been observed that the separation between the absorption and the emission bands of a fluorescent dye is smaller in a rigid polymer matrix than in the liquid monomer. Low temperature measurements have been carried out in order to understand this phenomena. It has been found, that the molecular mobility of the matrix, in which the dye is dissolved, plays an important role. By doping the rigid matrix with molecules of high mobility, the separation between the absorption and emission bands can be increased. A nearly complete separation can be achieved by this doping method if the difference of the dipole moments in the ground and excited states of the dye molecules is very large. This allows, for example, to increase the brightness of the fluorescence-activated liquid-crystal display (FLAD) and the efficiency of solar collectors based on fluorescent dyes.

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Authors and Affiliations

  1. Frauenhofer-Institut für Angewandte Festkörperphysik, Eckerstrasse 4, D-7800, Freiburg, Fed. Rep. Germany

    R. E. Sah & G. Baur

  2. Hoechst AG., D-6230, Frankfurt/Main, Fed. Rep. Germany

    H. Kelker

Authors
  1. R. E. Sah
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  2. G. Baur
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  3. H. Kelker
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Sah, R.E., Baur, G. & Kelker, H. Influence of the solvent matrix on the overlapping of the absorption and emission bands of solute fluorescent dyes. Appl. Phys. 23, 369–372 (1980). https://doi.org/10.1007/BF00903218

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  • DOI: https://doi.org/10.1007/BF00903218

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