Journal
SOFT MATTER
Volume 11, Issue 39, Pages 7835-7840Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm01641j
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Funding
- National Natural Science Foundation of China [21404039, 51172070]
- China Postdoctoral Science Foundation [2014M560304, 2015T80406]
- Fundamental Research Funds for the Central Universities [WD1414042]
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Based on the selective recognition of the polyethylene (PE) block of polyethylene-block-poly(ethylene glycol) (PE-b-PEG) by 1,4-diethoxypillar[5]arene (DEP5A), two novel thermo and competitive guest (1,4-dibromobutane or hexanedinitrile) responsive polypseudorotaxanes (PPRs) have been successfully constructed. The formation of PPRs both in solution and in the solid state was demonstrated by H-1 NMR, 2D NOESY, and WAXD analyses. TGA data illustrate that PPRs exhibit higher thermal stability than their precursor diblock copolymers. Moreover, intriguing porous disk-like aggregates are produced by electrospraying of PPRs in CHCl3 and the self-assembled structures of PPRs are totally changed by the addition of 1,4-dibromobutane or hexanedinitrile, demonstrating their competitive guest stimuli-responsiveness.
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