Title: Polyphenylene dendrimers with perylene diimide as a luminescent core
Authors: Herrmann, A ×
Weil, T
Sinigersky, V
Wiesler, UM
Vosch, Tom
Hofkens, Johan
De Schryver, Frans
Mullen, K #
Issue Date: Jan-2001
Publisher: Wiley-v c h verlag gmbh
Series Title: Chemistry - a European Journal vol:7 issue:22 pages:4844-4853
Abstract: A novel synthesis is presented of a fourfold ethynyl-substituted perylene diimide dye 4, which acts as a core molecule for the buildup of polyphenylene dendrimers. Around the luminescent core 4. a first-generation (5). a second-generation (6), and a third-generation (7) polyphenylene dendritic environment consisting of pentaphenylbenzene building blocks are constructed. The dendrimers 5 and 6 are synthesized by an exclusively divergent route, whereas for 7, a combination of a divergent and convergent approaches is applied. Absorption and emission spectra of 5-7 in different solvents and in a film have been measured and compared to a nondendronized model compound 13. In solution, the internal chromophore is scarcely influenced by the dendritic scaffold. however, in the solid state, aggregation of the perylene diimide is prevented very effectively by the four rigid dendrons. Additionally, fluorescence quantum yields in solution have been determined for 5-7 and 13; they decrease as the number of generation increases.
ISSN: 0947-6539
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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