Title: Reorientation of transition dipoles during exciton relaxation in J-aggregates probed by fluorescence anisotropy
Authors: Scheblykin, IG ×
Drobizhev, MA
Varnavsky, OP
Van der Auweraer, Mark
Vitukhnovsky, AG #
Issue Date: Jan-1996
Publisher: Elsevier science bv
Series Title: Chemical Physics Letters vol:261 issue:1-2 pages:181-190
Abstract: A negative fluorescence anisotropy is observed in J-aggregates of two thiacarbocyanine dyes in water-ethylene glycol low-temperature glass upon excitation outside the J-band. The fluorescence anisotropy gradually increases from -0.16 upon non-resonant excitation at 532 nm to +0.37 upon excitation at 610 nm (near the maximum of the J-band absorption). The fluorescence anisotropy is found to vary non-monotonically as a function of the emission wavelength within the J-band of the fluorescence. The dependence of the anisotropy on excitation frequency can be explained by a chain model with two molecules per unit cell. The transition dipole moment of each molecule is estimated to make an angle of 65-70 degrees with the chain direction.
ISSN: 0009-2614
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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