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Molecular recognition: polymers comprising isomeric meta-/para-isopropylphenol and N-isopropylacrylamide and their supramolecular complexes with methylated β-cyclodextrin

Authors

  • Sabrina Gingter,

    1. Institute of Organic Chemistry and Macromolecular Chemistry II, Department of Preparative Polymer Chemistry, Heinrich-Heine University of Düsseldorf, Universitätsstrasse 1, 40255 Düsseldorf, Germany
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  • Claudia van Sloun,

    1. Institute of Organic Chemistry and Macromolecular Chemistry II, Department of Preparative Polymer Chemistry, Heinrich-Heine University of Düsseldorf, Universitätsstrasse 1, 40255 Düsseldorf, Germany
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  • Helmut Ritter

    Corresponding author
    1. Institute of Organic Chemistry and Macromolecular Chemistry II, Department of Preparative Polymer Chemistry, Heinrich-Heine University of Düsseldorf, Universitätsstrasse 1, 40255 Düsseldorf, Germany
    • Institute of Organic Chemistry and Macromolecular Chemistry II, Department of Preparative Polymer Chemistry, Heinrich-Heine University of Düsseldorf, Universitätsstrasse 1, 40255 Düsseldorf, Germany.
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Abstract

We describe the molecular recognition of polymeric attached isomers meta-isopropylphenol and para-isopropylphenol, respectively, in a copolymer of N-isopropylacrylamide (NIPAAm) by use of randomly methylated β-cyclodextrin (RAMEB-CD). The acrylic monomers 4- and 3-isopropylphenylacrylate were synthesized and radically copolymerized with NIPAAm yielding the corresponding polymers. The supramolecular structures resulting from complexation with RAMEB-CD were characterized using dynamic light scattering, turbidity, NMR spectroscopy and isothermal titration. We found differences in binding constant, mean coil size and cloud point as a result of different complexations of the mentioned polymer-bound isomers with RAMEB-CD. Copyright © 2012 Society of Chemical Industry

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