摘要/Abstract

柱芳烃作为一种新型的大环芳烃化合物，基于柱芳烃的超分子凝胶一直深受大家关注.设计合成了一种碘功能化的柱[5]芳烃.该柱[5]芳烃在环己醇中可以形成稳定的超分子有机凝胶，相转变温度约为96℃.分别使用浓度核磁，2D NOESY氢谱，X射线衍射（XRD）粉末衍射和扫描电镜等实验对凝胶的形成过程进行了表征.结果表明，碘功能化的柱[5]芳烃自组装形成了一种片状结构.同时，研究了该凝胶的荧光识别性质.当在凝胶上分别加入Fe³⁺，Ag⁺，Ca²⁺，Co²⁺，Ni²⁺，Cd²⁺，Pb²⁺，Zn²⁺，Cu²⁺，Mg²⁺和Hg²⁺等金属离子，10 min后发现Hg²⁺和Ag⁺可以使凝胶的蓝色荧光猝灭.因此，该凝胶可以用于荧光检测Hg²⁺与Ag⁺.
关键词: 柱[5]芳烃, 超分子有机凝胶, 荧光检测, 金属离子
Pillararenes, a new kind of macrocyclic aromatic compounds, are closely attracted because it was used to construct supramolecular gels. In this paper, an iodine-functionalized pillar[5]arene was designed and synthesized. This pillar[5]arene can form a stable supramolecular organogel in cyclohexanol, and phase transition temperature is approximately 96 ℃. The formation process of the organogel was characterized by concentration dependent ¹H NMR spectrum, 2D NOESY experiment, X-ray diffraction (XRD) powder diffraction and scanning electron microscope. The experiment results showed that a sheet-like structure was formed in self-assembly process of iodine-functionalized pillar[5]arene. Meanwhile, the fluorescent recognition properties of organogel were studied. With the addition of 0.5 equiv. of various metal ions (Fe³⁺, Ag⁺, Ca²⁺, Co²⁺, Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cu²⁺, Mg²⁺ and Hg²⁺) onto the organogel, Hg²⁺ and Ag⁺ can cause blue fluorescence quenching of the organogel after 10 min. Therefore, this gel can be used for fluorescent detection of Hg²⁺ and Ag⁺.
Key words: pillar [5]arene, supramolecular organogel, fluorescence detection, metal ion


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