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Redistribution of emitting state population in conjugated polymers probed by single-molecule fluorescence polarization spectroscopy

Förster, Michael LU ; Thomsson, Daniel LU ; Hania, Ralph LU and Scheblykin, Ivan LU (2007) In Physical Chemistry Chemical Physics 9(6). p.761-766
Abstract
Fluctuations in the fluorescence polarization degree and direction are reported for the first time for single conjugated polymer molecules embedded in a polystyrene matrix at room temperature. The polymer molecule, a polythiophene derivative, clearly emits as a multi-chromophore ensemble showing that the energy does not funnel to any specific low-energy trap. The fluorescence instead originates from thermally populated exciton states with different relative orientations of the transition dipole moments. The fluctuations in the fluorescence polarization are explained in terms of changes in the relative contributions of the different exciton states to the signal due to conformational fluctuations of the molecule or selective exciton... (More)
Fluctuations in the fluorescence polarization degree and direction are reported for the first time for single conjugated polymer molecules embedded in a polystyrene matrix at room temperature. The polymer molecule, a polythiophene derivative, clearly emits as a multi-chromophore ensemble showing that the energy does not funnel to any specific low-energy trap. The fluorescence instead originates from thermally populated exciton states with different relative orientations of the transition dipole moments. The fluctuations in the fluorescence polarization are explained in terms of changes in the relative contributions of the different exciton states to the signal due to conformational fluctuations of the molecule or selective exciton quenching by triplet states. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
9
issue
6
pages
761 - 766
publisher
Royal Society of Chemistry
external identifiers
  • wos:000243928300012
  • scopus:33846857281
ISSN
1463-9084
DOI
10.1039/b615596k
language
English
LU publication?
yes
id
1e44b439-59ab-4d66-9911-2df0abf93357 (old id 674983)
date added to LUP
2007-12-07 09:38:18
date last changed
2017-10-01 04:47:28
@article{1e44b439-59ab-4d66-9911-2df0abf93357,
  abstract     = {Fluctuations in the fluorescence polarization degree and direction are reported for the first time for single conjugated polymer molecules embedded in a polystyrene matrix at room temperature. The polymer molecule, a polythiophene derivative, clearly emits as a multi-chromophore ensemble showing that the energy does not funnel to any specific low-energy trap. The fluorescence instead originates from thermally populated exciton states with different relative orientations of the transition dipole moments. The fluctuations in the fluorescence polarization are explained in terms of changes in the relative contributions of the different exciton states to the signal due to conformational fluctuations of the molecule or selective exciton quenching by triplet states.},
  author       = {Förster, Michael and Thomsson, Daniel and Hania, Ralph and Scheblykin, Ivan},
  issn         = {1463-9084},
  language     = {eng},
  number       = {6},
  pages        = {761--766},
  publisher    = {Royal Society of Chemistry},
  series       = {Physical Chemistry Chemical Physics},
  title        = {Redistribution of emitting state population in conjugated polymers probed by single-molecule fluorescence polarization spectroscopy},
  url          = {http://dx.doi.org/10.1039/b615596k},
  volume       = {9},
  year         = {2007},
}