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Temperature-Regulated Fluorescence Characteristics of Supramolecular Assemblies Formed By a Smart Polymer and a Conjugated Polyelectrolyte

  • Aqueous mixtures of a coumarin-labeled non-ionic thermoresponsive copolymer and a cationic polythiophene exhibit marked changes in their fluorescence properties upon heating. At room temperature, emission from the label is significantly quenched due to energy transfer to the conjugated polyelectrolyte. Heating the mixture reduces the energy-transfer efficiency markedly, resulting in a clearly visible change of the emission color. Although the two macromolecules associate strongly at room temperature, the number of interacting sites is largely reduced upon the phase transition. Crucially, the intermolecular association does not suppress the responsiveness of the smart polymer, meaning that this concept should be applicable to chemo- or bioresponsive polymers with optical read-out, for example, as a sensor device.

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Metadaten
Author:Sahika Inal, Jonas D. Koelsch, Leonardo Chiappisi, Mario Kraft, Andrea Gutacker, Dietmar Janietz, Ullrich Scherf, Michael Gradzielski, André LaschewskyORCiDGND, Dieter NeherORCiDGND
DOI:https://doi.org/10.1002/macp.201200493
ISSN:1022-1352 (print)
Parent Title (English):MACROMOLECULAR CHEMISTRY AND PHYSICS
Publisher:WILEY-V C H VERLAG GMBH
Place of publication:WEINHEIM
Document Type:Article
Language:English
Year of first Publication:2013
Year of Completion:2013
Release Date:2017/03/26
Tag:aqueous solutions; conjugated polyelectrolytes; fluorescence (or Forster); phase transitions; resonance energy transfer; thermoresponsive polymers
Volume:214
Issue:4
Pagenumber:11
First Page:435
Last Page:445
Funder:BMBF-Initiative [FKZ 03IS2201B]