Molecular recognition: polymers comprising isomeric meta‐/para‐isopropylphenol and N‐isopropylacrylamide and their supramolecular complexes with methylated β‐cyclodextrin |
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| Authors: | Sabrina Gingter Claudia van Sloun Helmut Ritter |
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| Affiliation: | Institute of Organic Chemistry and Macromolecular Chemistry II, Department of Preparative Polymer Chemistry, Heinrich‐Heine University of Düsseldorf, Universit?tsstrasse 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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| Keywords: | cyclodextrins inclusion complexes molecular recognition supramolecular chemistry |
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