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A bis-naphthalimide functionalized pillar[5]arene-based supramolecular π-gel acts as a multi-stimuli-responsive material

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Abstract

In this work, a novel supramolecular π-gel has been constructed using a naphthalimide functionalized pillar[5]arene-based gelator (MP5). The gelator MP5 simultaneously contains a naphthalimide moiety as the π⋯π interaction site as well as a fluorophore. Interestingly, the MP5-based supramolecular π-gel (MP5-G) exhibits strong aggregation-induced emission (AIE). MP5-G exhibited good thermal-responsiveness, acid and base-responsiveness and cation and amino acid-responsiveness. Meanwhile, this supramolecular π-gel also shows selective fluorescence sensing for Fe3+ via cation–π interactions with high selectivity and sensitivity, and the detection limit of MP5-G for Fe3+ is 6.06 × 10−8 M. Even more meaningfully, MP5-G could remove Fe3+ from water solution with excellent recyclability and ingestion capacity, and the Fe3+ removal rate can reach up to 99.8%. Furthermore, the Fe3+ coordinated supramolecular gel, MP5-FeG, shows selective fluorescence “turn-on” sensing for L-Cys. The detection limit of MP5-FeG for L-Cys is 1.0 × 10−8 M. Simultaneously, thin films based on these supramolecular gels were prepared, which were confirmed to be convenient test kits for detecting Fe3+ and L-Cys. In addition, these supramolecular π-gels could be used as sensitive ion sensors, sensitive logic gates and fluorescent display materials.

Graphical abstract: A bis-naphthalimide functionalized pillar[5]arene-based supramolecular π-gel acts as a multi-stimuli-responsive material

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Publication details

The article was received on 18 Jul 2018, accepted on 27 Aug 2018 and first published on 28 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ03583K
Citation: New J. Chem., 2018, Advance Article
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    A bis-naphthalimide functionalized pillar[5]arene-based supramolecular π-gel acts as a multi-stimuli-responsive material

    Y. Zhang, Y. Li, K. Zhong, W. Qu, H. Yao, T. Wei and Q. Lin, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ03583K

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