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A Supramolecular Janus Hyperbranched Polymer and Its Photoresponsive Self-Assembly of Vesicles with Narrow Size Distribution
作者:Liu, Y.; Yu, C. Y.; Jin, H. B.; Jiang, B. B.; Zhu, X. Y.; Zhou, Y. F.*; Lu, Z. Y.*; Yan, D. Y.
關(guān)鍵字:Supramolecular Janus Hyperbranched Polymer, Self-Assembly
論文來源:期刊
具體來源:J. Am. Chem. Soc. 2013, 135, 4765. http://pubs.acs.org/doi/pdf/10.1021/ja3122608
發(fā)表時間:2013年

Abstract Image

Herein, we report a novel Janus particle and supramolecular block copolymer consisting of two chemically distinct hyperbranched polymers, which is coined as Janus hyperbranched polymer. It is constructed by the noncovalent coupling between a hydrophobic hyperbranched poly(3-ethyl-3-oxetanemethanol) with an apex of an azobenzene (AZO) group and a hydrophilic hyperbranched polyglycerol with an apex of a β-cyclodextrin (CD) group through the specific AZO/CD host–guest interactions. Such an amphiphilic supramolecular polymer resembles a tree together with its root very well in the architecture and can further self-assemble into unilamellar bilayer vesicles with narrow size distribution, which disassembles reversibly under the irradiation of UV light due to the trans-to-cis isomerization of the AZO groups. In addition, the obtained vesicles could further aggregate into colloidal crystal-like close-packed arrays under freeze-drying conditions. The dynamics and mechanism for the self-assembly of vesicles as well as the bilayer structure have been disclosed by a dissipative particle dynamics simulation.

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