Journal of Fluorescence

, Volume 8, Issue 1, pp 37–44 | Cite as

Electronic deactivation and energy transfer in doped oligophenylenevinylene nanoparticles

  • J. Gierschner
  • H.-J. Egelhaaf
  • D. Oelkrug
  • K. Müllen
Special Papers

Abstract

Suspensions of oligophenylenevinylene (nPV) nanoparticles withn = 2 vinylene units are doped with nPVs of longer chainlengths,n = 3–5. Absorption and fluorescence spectroscopy and steady-state and time-resolved fluorescence anisotropy measurements are used to determine the photo-physical properties of the suspensions. Undoped nanoparticles form highly oriented H-aggregates with low fluorescence quantum yields (ΦF ≈ 0.1). Introduction of bulky substituents into the particle constituting molecules perturbs the intermolecular orientation. Upon doping, efficient energy transfer to the dopants is found, changing the color and leading to enhancement of the fluorescence quantum yields up to ΦF = 0.6. The intermolecular orientation is not changed upon doping.

Key words

Oligo(phenylenevinylene) films nanoparticles energy transfer time-resolved fluorescence anisotropy 

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Copyright information

© Plenum Publishing Corporation 1998

Authors and Affiliations

  • J. Gierschner
    • 1
  • H.-J. Egelhaaf
    • 1
  • D. Oelkrug
    • 1
  • K. Müllen
    • 2
  1. 1.Institut für Physikalische und Theoretische ChemieUniversitÄt TübingenTübingenGermany
  2. 2.Max-Planck-Institut für PolymerforschungMainzGermany

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