Dendronized copolymers functionalized with crown ethers and their reversible modification through host–guest interaction |
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| Authors: | Xingquan Xiong Yongming Chen Shu Feng Wei Wang |
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| Institution: | 1. State Key Laboratory of Polymer Physics and Chemistry, Joint Laboratory of Polymer Sciences and Materials, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China;2. The Key Laboratory of Functional Polymer Materials and Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China |
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| Abstract: | Crown ether‐functionalized dendronized copolymers with an alternating structure were synthesized by free radical copolymerization of styrene derivatives pendent with Percec‐type polyether dendron of two generations and maleimide pendent with dibenzo24]crown‐8 (24C8). Novel dendronized copolymers bearing tremendous host molecular cavities have been characterized by 1H NMR, 13C NMR spectroscopy, static light scattering (SLS), and differential scanning calorimetry (DSC) analysis as well as atomic force microscopy (AFM) techniques. Host–guest interactions between 24C8 units dispersed along the dendronized copolymers and organic ammonium salts of pyrene, anthracene, and phenol have been explored. These molecular recognition processes can be monitored by 1H NMR spectroscopy and fluorescence excitation spectroscopy. These results showed that the supramolecular polymer systems are acid–base controllable, demonstrating that dendronized copolymers may be modified reversibly via host–guest interaction. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010 |
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| Keywords: | dendrimers dendronized polymers host– guest systems radical polymerization |
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