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A novel supramolecular polymer gel based on naphthalimide functionalized-pillar[5]arene for the fluorescence detection of Hg2+ and I and recyclable removal of Hg2+ via cation–π interactions

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Abstract

The development of novel materials for the detection and removal of Hg2+ is a very important issue due to the acute toxicity of Hg2+. Herein, a novel supramolecular polymer P5BD–DPHB has been constructed by the collaboration of a naphthalimide functionalized-pillar[5]arene host (P5BD) and a bis-bromohexane functionalized-pillar[5]arene guest (DPHB). P5BD–DPHB could form a stable supramolecular gel (P5BD–DPHB–G). Interestingly, P5BD–DPHB–G shows selective fluorescent “turn-on” detection for Hg2+ via cation–π interactions with high selectivity and sensitivity. Furthermore, the Hg2+ coordinated supramolecular gel P5BD–DPHB–HgG can detect I successively. The detection limits for Hg2+ and I are 1.65 × 10−9 and 1.84 × 10−8 mol L−1, respectively. Even more significantly, the xerogel of P5BD–DPHB–G could remove Hg2+ from aqueous solution with excellent recyclability and ingestion capacity, and with a Hg2+ removal rate of 98%.

Graphical abstract: A novel supramolecular polymer gel based on naphthalimide functionalized-pillar[5]arene for the fluorescence detection of Hg2+ and I− and recyclable removal of Hg2+ via cation–π interactions

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Publication details

The article was received on 21 Jul 2017, accepted on 18 Aug 2017 and first published on 18 Aug 2017


Article type: Paper
DOI: 10.1039/C7SM01447C
Citation: Soft Matter, 2017, Advance Article
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    A novel supramolecular polymer gel based on naphthalimide functionalized-pillar[5]arene for the fluorescence detection of Hg2+ and I and recyclable removal of Hg2+ via cation–π interactions

    Q. Lin, P. Mao, Y. Fan, L. Liu, J. Liu, Y. Zhang, H. Yao and T. Wei, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM01447C

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