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Issue 3, 2020
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Polyrotaxanes created by end-capping polypseudorotaxanes self-assembled from β-CDs with distal azide terminated PHEMA using propargylamine monosubstituted β-CDs

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Abstract

When a distal azide terminated poly(2-hydroxyethylmethacrylate) (PHEMA) underwent aqueous CuAAC with propargylamine monosubstituted β-CDs (PA-β-CDs), the corresponding β-CD end-capped PHEMA was invariably generated. If it was self-assembled with varying numbers of β-CDs in water, followed by in situ CuAAC with increasing amounts of PA-β-CDs, linear polyrotaxanes (PRs) or a mixture of linear and hyper-branched PRs were created. Apparently β-CDs are able to self-assemble with an evidently unfitting PHEMA, and the entrapped β-CDs can promote part of the PA-β-CDs to be inserted into them and then to be concomitantly threaded onto the polymeric back-bone giving hyperbranched PRs after the click reaction.

Graphical abstract: Polyrotaxanes created by end-capping polypseudorotaxanes self-assembled from β-CDs with distal azide terminated PHEMA using propargylamine monosubstituted β-CDs

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Article information


Submitted
28 Oct 2019
Accepted
28 Nov 2019
First published
29 Nov 2019

Polym. Chem., 2020,11, 653-658
Article type
Communication

Polyrotaxanes created by end-capping polypseudorotaxanes self-assembled from β-CDs with distal azide terminated PHEMA using propargylamine monosubstituted β-CDs

M. Gao, H. Lu, R. Song, L. Ye, A. Zhang and Z. Feng, Polym. Chem., 2020, 11, 653
DOI: 10.1039/C9PY01619H

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