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Title: Photophysics of a thiacarbocyanine dye in organic-solvents
Authors: Noukakis, D ×
Van der Auweraer, Mark
Toppet, Suzanne
De Schryver, Frans #
Issue Date: Jan-1995
Publisher: American Chemical Society
Series Title: Journal of Physical Chemistry vol:99 issue:31 pages:11860-11866
Abstract: The photophysical properties of the triethylammonium salt of 3,3'-bis(sulfopropyl)-5,5'-dichloro-9-ethylthiacarbocyanine (THIATS) and other related dyes have been studied by means of steady-state and time-resolved spectroscopic techniques. Absorption and fluorescence maxima and bandwidths suggest, together with NMR data, the existence of more than one ground-state conformation for this dye. Analysis of the fluorescence decays by time-correlated single-photon counting and time-resolved fluorescence spectroscopy further supports the steady-state spectroscopy results. An additional short-lived fluorescent species is observed in some polar solvents such as methanol and I-octanol. The dependence of the spectral features and the fluorescence kinetics on the nature of the solvent is explained by a model invoking ion-pairing and conformational changes in the ground state of the dye. It is shown that polarity and polarizability of the solvent control the photophysical properties of THIATS.
ISSN: 0022-3654
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Molecular Design and Synthesis
× corresponding author
# (joint) last author

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