Single-molecule photobleaching probes the exciton wave function in a multichromophoric system
Hernando Campos, Jordi (Institute for Nanotechnology (Enschede, Països Baixos))
Hoogenboom, Jacob P. (Institute for Nanotechnology (Enschede, Països Baixos))
van Dijk, Erik M. H. P. (Institute for Nanotechnology (Enschede, Països Baixos))
García López, Juan José (Institute for Nanotechnology (Enschede, Països Baixos))
Crego Calama, Mercedes (Institute for Nanotechnology (Enschede, Països Baixos))
Reinhoudt, David N. (Institute for Nanotechnology (Enschede, Països Baixos))
van Hulst, Niek F.. (Institute for Nanotechnology (Enschede, Països Baixos))
García Parajó, María F.. (Institute for Nanotechnology (Enschede, Països Baixos))

Data:	2004
Resum:	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.
Ajuts:	Ministerio de Ciencia y Tecnología BQU2002-04269-C02-02
Nota:	Ajuts: This work has been supported by the EC Program IHP- 99 (HPMF-CT-2002-01698)
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; Versió publicada
Publicat a:	Physical review letters, Vol. 93, Issue 23 (December 2004) , p. 236404, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.93.236404

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