Single Molecule Photobleaching Probes the Exciton Wavefunction in a Multichromophoric System

J. Hernando Campos, J.P. Hoogenboom, E.M.H.P. van Dijk, J.J. Garcia lopez, Mercedes Crego Calama, David Reinhoudt, N.F. van Hulst, M.F. Garcia Parajo

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Abstract

The exciton wave function of a trichromophoric system is investigated by means of single molecule spectroscopy at room temperature. Individual trimers exhibit superradiance and loss of vibronic structure in emission spectrum, features proving exciton delocalization. We identify two distinct photodegradation pathways for single trimers upon sequential photobleaching of the chromophores. The rate of each pathway is a measure for the contribution of the separate dyes to the collective excited state of the system, in this way probing the wave function of the delocalized exciton.
Original languageEnglish
Pages (from-to)236404-1-236404-4
Number of pages4
JournalPhysical review letters
Volume93
Issue number23
DOIs
Publication statusPublished - 2004

Keywords

  • IR-49160
  • METIS-221238

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