Power-Law-Distributed Dark States are the Main Pathway for Photobleaching of Single Organic Molecules

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Hoogenboom, Jacob P. and Dijk van, Erik M.H.P. and Hernando, Jordi and Hulst van, Niek F. and Garcia-Parajo, Maria F. (2005) Power-Law-Distributed Dark States are the Main Pathway for Photobleaching of Single Organic Molecules. Physical Review Letters, 95 (097401). 097401-1. ISSN 0031-9007

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Abstract:We exploit the strong excitonic coupling in a superradiant trimer molecule to distinguish between long-lived collective dark states and photobleaching events. The population and depopulation kinetics of the dark states in a single molecule follow power-law statistics over 5 orders of magnitude in time. This result is consistent with the formation of a radical unit via electron tunneling to a time-varying distribution of trapping sites in the surrounding polymer matrix. We furthermore demonstrate that this radicalization process forms the dominant pathway for molecular photobleaching.
Item Type:Article
Copyright:© 2005 The American Physical Society
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Link to this item:http://purl.utwente.nl/publications/52710
Official URL:http://dx.doi.org/10.1103/PhysRevLett.95.097401
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Metis ID: 224406