Exponential and power-law kinetics in single-molecule fluorescence intermittency

Matthias Haase, Christian G. Hübner*, E. Reuther, A. Herrmann, K. Müllen, Th Basché

*Corresponding author for this work
105 Citations (Scopus)


Perylenemonoimide chromophores, attached to a small dendron arm embedded in the polymer hosts Zeonex, poly(vinylbutyral), and poly(methyl methacrylate), are studied by means of laser-induced confocal fluorescence detection. Transient fluorescence intensity exhibits dark periods on two different time scales: on a 100 μs time scale and on a considerably longer time scale, ranging from 100 ms to as much as tens of seconds under high-vacuum conditions. The exponentially distributed short "off" times are attributed to triplet excursions of the molecule. The long-lived dark states follow a power-law distribution and are discussed in terms of the formation of radical anions/cations via electron tunneling processes.

Original languageEnglish
JournalJournal of Physical Chemistry B
Issue number29
Pages (from-to)10445-10450
Number of pages6
Publication statusPublished - 22.07.2004


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