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Issue 44, 2018
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A multi-stimuli responsive metallosupramolecular polypseudorotaxane gel constructed by self-assembly of a pillar[5]arene-based pseudo[3]rotaxane via zinc ion coordination and its application for highly sensitive fluorescence recognition of metal ions

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Abstract

A novel metallosupramolecular polypseudorotaxane has been successfully prepared via a pillar[5]arene-based pseudo[3]rotaxane and zinc ion coordination. The obtained metallosupramolecular polypseudorotaxane could self-assemble to form a fluorescent metallosupramolecular polypseudorotaxane gel at a high concentration. Interestingly, by taking advantage of the dynamic nature of metal–ligand bonds, host–guest interactions and hydrogen bonding interactions, the multiple stimuli-responsive gel–sol phase transitions of such a polypseudorotaxane gel were successfully realized under different stimuli, such as temperature, sulfide, formaldehyde, competitive guests, etc. Moreover, this metallosupramolecular polypseudorotaxane gel could effectively sense Fe3+ and Cu2+via fluorescence. It is worth noting that this metallosupramolecular polypseudorotaxane gel could be used as an ultrasensitive fluorescent sensor for detecting Fe3+ with a fluorescence spectrum detection limit of 0.893 nM. Meanwhile, the detection limit was 45.7 nM for Cu2+, also indicating the superior sensitivity of the gel to Cu2+. Moreover, thin films based on this metallosupramolecular polypseudorotaxane gel were prepared, which could act as convenient test kits for detecting Fe3+ and Cu2+.

Graphical abstract: A multi-stimuli responsive metallosupramolecular polypseudorotaxane gel constructed by self-assembly of a pillar[5]arene-based pseudo[3]rotaxane via zinc ion coordination and its application for highly sensitive fluorescence recognition of metal ions

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Publication details

The article was received on 11 Sep 2018, accepted on 15 Oct 2018 and first published on 16 Oct 2018


Article type: Paper
DOI: 10.1039/C8PY01319E
Citation: Polym. Chem., 2018,9, 5370-5376
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    A multi-stimuli responsive metallosupramolecular polypseudorotaxane gel constructed by self-assembly of a pillar[5]arene-based pseudo[3]rotaxane via zinc ion coordination and its application for highly sensitive fluorescence recognition of metal ions

    J. Ding, J. Chen, Q. Lin, H. Yao, Y. Zhang and T. Wei, Polym. Chem., 2018, 9, 5370
    DOI: 10.1039/C8PY01319E

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