Optics and Spectroscopy

, Volume 98, Issue 5, pp 681–686 | Cite as

Intersystem crossing mechanisms and single molecule fluorescence: Terrylene in anthracene crystals

  • M. A. Kol’chenko
  • B. Kozankiewicz
  • A. Nicolet
  • M. Orrit


Single molecule spectroscopy requires molecules with low triplet yields and/or short triplet lifetimes. The intersystem crossing (ISC) rate may be dramatically enhanced by the host matrix. Comparing the fluorescence intensity of single terrylene molecules in para-terphenyl, naphthalene, and anthracene crystals, we found a reduction of the saturation intensity by three orders of magnitude in the latter case. The fluorescence autocorrelation function indicates that the bottleneck state is the terrylene triplet. We propose a ping-pong mechanism between host and guest. This intermolecular ISC mechanism, which can open whenever the host triplet lies lower than the guest singlet, was overlooked in previous single molecule investigations.


Naphthalene Single Molecule Molecule Investigation Host Matrix Molecule Fluorescence 
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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • M. A. Kol’chenko
    • 1
  • B. Kozankiewicz
    • 1
    • 2
  • A. Nicolet
    • 1
  • M. Orrit
    • 1
  1. 1.Molecular Nano-Optics and Spins (MoNOS), Leiden Institute of Physics (LION), Huygens LaboratoryLeiden UniversityLeidenThe Netherlands
  2. 2.Institute of PhysicsPolish Academy of SciencesWarsawPoland

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