A novel pillar[5]arene-based multifunctional supramolecular hydrogel (HG) has been successfully constructed. The obtained supramolecular hydrogel shows excellent self-healing capacity. Meanwhile, this supramolecular hydrogel exhibited good multi-stimuli responsive behavior including thermal-responsiveness, pH-responsiveness, anion-responsiveness, and competitive agent-responsiveness. In addition, this hydrogel could effectively detect iron ions (Fe³⁺) by fluorescence. The fluorescence spectra detection limit was 7.86 × 10⁻¹⁰ M, indicating the ultra-sensitivity of the hydrogel to Fe³⁺. The thin film based on this hydrogel was also prepared, which was confirmed to be a convenient test kit for detecting Fe³⁺. Furthermore, this supramolecular hydrogel (HG) is also an excellent conductive material.

中文翻译：

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基于支柱[5]芳烃的多功能超分子水凝胶：多重刺激反应性，自我修复，荧光传感和电导率†

一种新型的基于柱[5]芳烃的多功能超分子水凝胶（HG）已经成功构建。所得的超分子水凝胶显示出优异的自愈能力。同时，该超分子水凝胶表现出良好的多刺激响应行为，包括热响应性，pH响应性，阴离子响应性和竞争剂响应性。另外，该水凝胶可以通过荧光有效地检测铁离子（Fe ³⁺）。荧光光谱的检测限为7.86×10 ^-10 M，表明水凝胶对Fe ³⁺的超敏感性。还制备了基于该水凝胶的薄膜，这被证实是检测Fe ³⁺的便捷测试试剂盒。。此外，这种超分子水凝胶（HG）也是一种出色的导电材料。