Abstract
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 language | English |
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Journal | Journal of Physical Chemistry B |
Volume | 108 |
Issue number | 29 |
Pages (from-to) | 10445-10450 |
Number of pages | 6 |
ISSN | 1520-6106 |
DOIs | |
Publication status | Published - 22.07.2004 |