Single Molecule Photobleaching Probes the Exciton Wavefunction in a Multichromophoric System

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Hernando, J. and Hoogenboom, J.P. and Dijk, E.M.H.P. van and Garcia-Lopez, J.J. and Crego Calama, M. and Reinhoudt, D.N. and Hulst, N.F. van and Garcia-Parajo, M.F. (2004) Single Molecule Photobleaching Probes the Exciton Wavefunction in a Multichromophoric System. Physical Review Letters, 93 (23). pp. 236404-1. ISSN 0031-9007

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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.
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Copyright:© 2004 The American Physical Society
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Link to this item:http://purl.utwente.nl/publications/49160
Official URL:http://dx.doi.org/10.1103/PhysRevLett.93.236404
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