Responsive Supramolecular Gels Constructed by Crown Ether Based Molecular Recognition

Authors

  • Zhishen Ge,

    1. Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China), Fax: (+86) 551-3607348
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  • Jinming Hu,

    1. Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China), Fax: (+86) 551-3607348
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  • Feihe Huang Prof. Dr.,

    1. Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027 (P.R. China), Fax: (+86) 571-87953189
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  • Shiyong Liu Prof. Dr.

    1. Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China), Fax: (+86) 551-3607348
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  • This work was financially supported by an Outstanding Youth Fund (50425310) and research grants (20534020, 20674079, and 20874092) from the National Natural Scientific Foundation of China (NNSFC).

Abstract

Responsive supramolecular gels were constructed from crown ether terminated four-arm star poly(ε-caprolactone) (PCL–DB24C8) and dibenzylammonium-terminated two-arm PCL–DBAS (see scheme), exploiting the formation of pseudorotaxane linkages between crown ether and ammonium moieties. The resultant supramolecular gels exhibit thermo- and pH-induced reversible gel–sol transition.

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