Green, Efficient Detection and Removal of Hg2+ by Water-Soluble Fluorescent Pillar[5]arene Supramolecular Self-Assembly

文献类型： 外文期刊

第一作者： Jiang, Xiaomei

作者： Jiang, Xiaomei;Wang, Lingyun;Tang, Hao;Cao, Derong;Ran, Xueguang

作者机构：

关键词： supramolecular self-assembly; fluorescence sensing; water-soluble pillar[5]arene; mercury(II) detection; diketopyrrolopyrrole

期刊名称：BIOSENSORS-BASEL （ 影响因子：5.743； 五年影响因子：5.972 ）

ISSN：

年卷期： 2022 年 12 卷 8 期

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收录情况： SCI

摘要： Developing a water-soluble supramolecular system for the detection and removal of Hg2+ is extremely needed but remains challenging. Herein, we reported the facile construction of a fluorescent supramolecular system (H superset of G) in 100% water through the self-assembly of carboxylatopillar[5]arene sodium salts (H) and diketopyrrolopyrrole-bridged bis(quaternary ammonium) guest (G) by host-guest interaction. With the addition of Hg2+, the fluorescence of H superset of G could be efficiently quenched. Since Hg2+ showed synergistic interactions (coordination and Hg2+- cavity interactions with G and H, respectively), crosslinked networks of H superset of G@Hg2+ were formed. A sensitive response to Hg2+ with excellent selectivity and a low limit of detection (LOD) of 7.17 x 10(-7) M was obtained. Significantly, the quenching fluorescence of H superset of G@Hg2+ can be recovered after a simple treatment with Na2S. The reusability of H superset of G for the detection of Hg2+ ions was retained for four cycles, indicating the H superset of G could be efficiently used in a reversible manner. In addition, the H superset of G could efficiently detect Hg2+ concentration in real samples (tap water and lake water). The developed supramolecular system in 100% water provides great potential in the treatment of Hg2+ detection and removal for environmental sustainability.

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