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Macrocycle-based topological azo-polymers: facile synthesis and unusual photoresponsive properties

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Abstract

Three kinds of well-defined topological azo-polymers with controlled molecular weights are prepared using an acrylate-functionalized cyclic polymeric azo-precursor by a selective head-to-tail acyclic diene metathesis (ADMET) polymerization. First, a multifunctional linear precursor bearing the terminal alkyne, hydroxyl, and azido groups were elaborately synthesized. A well-defined acrylate-containing monocyclic azo-polymer was then prepared via “click” ring closure and esterification, which can be considered a selective macromolecular chain stopper in the subsequent ADMET polymerizations of three different types of azo-functionalized monomers. Finally, azo-polymers with cyclic–linear, cyclic–linear–cyclic, and cyclic–hyperbranched topologies were successfully constructed, respectively. Interestingly, these prepared azo-polymers show distinct and unusual photoresponsive behaviors.

Graphical abstract: Macrocycle-based topological azo-polymers: facile synthesis and unusual photoresponsive properties

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Publication details

The article was received on 06 Oct 2016, accepted on 20 Dec 2016 and first published on 22 Dec 2016


Article type: Paper
DOI: 10.1039/C6PY01743F
Citation: Polym. Chem., 2017, Advance Article
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    Macrocycle-based topological azo-polymers: facile synthesis and unusual photoresponsive properties

    L. Ding, W. Song, R. Jiang and L. Zhu, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C6PY01743F

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