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Ivan Scheblykin. Portrait.

Ivan Scheblykin

Professor

Ivan Scheblykin. Portrait.

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

Author

  • Michael Förster
  • Daniel Thomsson
  • Ralph Hania
  • Ivan Scheblykin

Summary, in English

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.

Department/s

  • Immunology
  • Chemical Physics

Publishing year

2007

Language

English

Pages

761-766

Publication/Series

Physical Chemistry Chemical Physics

Volume

9

Issue

6

Document type

Journal article

Publisher

Royal Society of Chemistry

Topic

  • Immunology in the Medical Area (including Cell and Immunotherapy)

Status

Published

Research group

  • Immunology

ISBN/ISSN/Other

  • ISSN: 1463-9084