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Cover Picture: ChemPhysChem 12/2002
Author(s) -
Köhn Fabian,
Hofkens Johan,
Gronheid Roel,
Cotlet Mircea,
Müllen Klaus,
Van der Auweraer Mark,
De Schryver Frans C.
Publication year - 2002
Publication title -
chemphyschem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200290013
Subject(s) - chromophore , cover (algebra) , fluorescence , molecule , chemical physics , chemistry , energy transfer , förster resonance energy transfer , nanotechnology , biological system , physics , photochemistry , materials science , optics , mechanical engineering , organic chemistry , engineering , biology
The cover picture shows two different guest chromophores in a dendritic host. In this system the thiacarbocyanine dye A can act as an energy donor for the thiadicarbocyanine dye B. This system has been studied at the ensemble as well as at the single‐molecule level. Because of the many free parameters in the system the results at the ensemble level are too complex to analyze in detail. At the single‐molecule level a wide variety of energy transfer efficiencies was observed. Moreover, single entities showed fluctuations of the energy transfer efficiency as a function of time. In the background of the cover picture a smoothed surface of a 3D histogram of donor decay time versus fluorescence intensity is plotted for a single entity. Clearly two domains of energy transfer efficiency are observed. The single‐molecule results permit a more in‐depth understanding of the photophysics of this complex system. Find out more in the article by Hofkens and De Schryver et al. on pages 1005–1013.