Temperature‐Regulated Fluorescence Characteristics of Supramolecular Assemblies Formed By a Smart Polymer and a Conjugated Polyelectrolyte. Issue 4 (12th December 2012)

• Record Type: Journal Article
• Authors: Inal, Sahika; Kölsch, Jonas D.; Chiappisi, Leonardo; Kraft, Mario; Gutacker, Andrea; Janietz, Dietmar; Scherf, Ullrich; Gradzielski, Michael; Laschewsky, André; Neher, Dieter
• Is Part Of: Macromolecular chemistry and physics. Volume 214:Issue 4(2013:Feb.)
• Page Start: 435
• Page End: 445
• Publication Date: 2012-12-12
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201200493
• Languages: English
• ISSNs: 1022-1352

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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.</p> </abstract>