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Time dependence of the steady state fluorescence in polymer guest‐host systems
Author(s) -
Arici Elif,
Greiner Andreas,
Raubacher Florian,
Wendorff Joachim H.
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000901)201:14<1679::aid-macp1679>3.0.co;2-c
Subject(s) - chromophore , excimer , polymer , fluorescence , photochemistry , irradiation , matrix (chemical analysis) , chemistry , molar mass , chemical physics , polymer chemistry , chemical engineering , organic chemistry , optics , physics , engineering , chromatography , nuclear physics
The fluorescence of guest‐host systems composed of an amorphous polymer matrix and various concentrations of selected chromophores is considered. Such systems are of interest for applications in organic light emitting diodes. The observation is that the fluorescence results predominantly from excimers and that the excimer emission is strongly reduced as a function of irradiation time in the polymer matrix while no such effects were found for solutions of the chromophore in low molar mass solvents. The rate of change of steady state fluorescence depends on the polymer matrix and the process is partially reversible in some guest‐host systems. We tentatively attribute the effect to time dependent configurational changes taking place within the chromophore‐polymer matrix due to irradiation.