Vol. 6, issue 03, article # 16

Gruzinskii V. V., Senyuk M. A., Golovatyi A. I. Concentration shift of fluorescence spectra of compound molecules in polymeric matrices. // Atmospheric and oceanic optics. 1993. V. 6. No. 03. P. 319-325. PDF
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Concentration shifts of the fluorescence spectra of compound molecules in stretched and free films of polyvinil alcohol are studied. It is shown that stretching of polymeric films leads to an increase of the efficiency of excitation energy migration between the activator molecules in the case of trypaflavin and 2-(stilbenyl-4)-5-phenyloxasol, while in the case of rhodamine-6G and eosine the dependence is inverse. Investigation of polarization spectra of fluorescence and spectral behavior of dichroism allowed us to explain the observed facts by different orientation of absorbing and fluorescent oscillators of these substances relative to the film stretching axis.