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Frequency selective excitation of single chromophores within shape-persistent multichromophoric dendrimers

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Christ, T., Kulzer, F., Weil, T., Müllen, K., & Basche, T. (2003). Frequency selective excitation of single chromophores within shape-persistent multichromophoric dendrimers. Chemical Physics Letters, 372(5-6), 878-885.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-620A-2
Zusammenfassung
Isolated multichromophoric dendrimers containing four perylenemonoimide chromophores were investigated in a confocal microscope which allowed imaging of the same set of dendrimers over a wide temperature range. Emission spectra at low temperature (2 K) reveal narrow zero-phonon lines although the electron-phonon coupling is not negligible. By using fluorescence excitation spectroscopy, the sharp purely electronic zero-phonon lines of single chromophores within a single multichromophoric unit could be isolated in the frequency domain. Selective excitation into a higher energy chromophoric site is followed by rapid directional energy transfer into the lowest energy site from which emission then occurs. (C) 2003 Elsevier Science B.V. All rights reserved.