Journal
JOURNAL OF LUMINESCENCE
Volume 126, Issue 1, Pages 14-20Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2006.04.012
Keywords
solvatochromic; two-photon absorbing fluorene derivatives; excitation anisotropy; fluorescence
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The effect of solvent polarity on the fluorescence properties of several two-photon absorbing fluorene derivatives was investigated. A strong solvatochromic effect was observed for symmetrical fluorene compound, which can be explained by large changes in the quadrupolar moment under excitation. Limiting values of excitation anisotropy of the investigated fluorenes exhibited a dependence on solvent polarity, and the angles between the absorption and emission transition dipole moments decrease in polar solvents by more than a factor of two. (C) 2006 Elsevier B.V. All rights reserved.
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