有机化学 ›› 2022, Vol. 42 ›› Issue (5): 1474-1482.DOI: 10.6023/cjoc202111024 上一篇    下一篇

研究论文

基于Au3+和I构建的单-(6-二乙烯三胺-6-去氧)-β-环糊精超分子荧光开关

鲁佳佳, 杨俊丽, 古捷, 杨举, 高振杰苏丽娇, 陶欣, 袁明伟*(), 杨丽娟*(), Lijuan Yang*   

  1. 云南民族大学化学与环境学院 云南省高校智能超分子化学重点实验室 生物基材料绿色制备技术国家地合工程中心 昆明 650500
  • 收稿日期:2021-11-15 修回日期:2022-01-17 发布日期:2022-01-27
  • 通讯作者: 袁明伟, 杨丽娟, Lijuan Yang
  • 基金资助:
    国家自然科学基金(21762051); 云南省高校有机功能分子及材料科技创新团队和云南省教育厅科学研究基金资助项目

Mono-(6-diethylenetriamine-6-deoxy)-β-cyclodextrin Supramolecular Fluorescent Switch Constructed Based on Au3+ and I

Jiajia Lu, Junli Yang, Jie Gu, Ju Yang, Zhenjie Gao, Lijiao Su, Xin Tao(), Mingwei Yuan(), Lijuan Yang   

  1. Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry & Environment, Yunnan Minzu University, Kunming 650500
  • Received:2021-11-15 Revised:2022-01-17 Published:2022-01-27
  • Contact: Xin Tao, Mingwei Yuan, Lijuan Yang
  • Supported by:
    National Natural Science Foundation of China(21762051); Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province and Yunnan Provincial Department of Education Science Research Fund

选用绿色高效的方法合成了具有较好水溶性的单-(6-二乙烯三胺-6-去氧)-β-环糊精(3N-β-CD), 通过核磁共振氢谱(1H NMR)和高分辨质谱(HRMS)对其结构进行表征. 用合成的3N-β-CD作为荧光探针对水溶液中的27种离子进行检测, 发现Au3+和I能使3N-β-CD的荧光猝灭. 进一步通过荧光滴定、Job曲线、核磁共振、红外光谱、离子干扰、时间响应对3N-β-CD检测Au3+和I的性能进行了研究. 结果表明, Au3+的最低检测限为2.73×10–6 mol/L, 与3N-β-CD络合的化学计量比为1∶1; I的最低检测限为1.44×10–6 mol/L, 与3N-β-CD络合的化学计量比为2∶1; 表明该探针可以灵敏地检测Au3+和I. 此外, 当I加入3N-β-CD与Au3+的混合溶液中, 3N-β-CD的荧光强度会逐渐恢复; 有趣的是, 当Au3+加入3N-β-CD与I的混合溶液中, 3N-β-CD的荧光强度也会逐渐恢复. 表明Au3+与I可作为荧光“开-关”来控制3N-β-CD的荧光发光行为, 从而使Au3+和I实现互相检测. 并在此基础上设计了控制3N-β-CD荧光开-关的逻辑门. 该研究为3N-β-CD作为荧光“开-关”传感器的研究与应用提供了新的实验思路.

关键词: 单-(6-二乙烯三胺-6-去氧)-β-环糊精, 金离子, 碘离子, 荧光开-关, 逻辑门

Mono-(6-diethylenetriamine-6-deoxy)-β-cyclodextrin (3N-β-CD) with the good water solubility was synthesized by a green and efficient method, and its structure was characterized by 1H NMR and HRMS. 3N-β-CD was used as a fluorescent probe to detect 27 kinds of ions in aqueous solution. The results showed that the fluorescence of 3N-β-CD was quenched by Au3+ and I. The performance of 3N-β-CD for detecting Au3+ and I was further explored by fluorescence titration, Job curve, nuclear magnetic resonance, infrared spectroscopy, ion interference and time response. The results diplayed that the minimum detection limit of 3N-β-CD for Au3+ was 2.73×10–6 mol/L and the binding stoichiometry ratios of 3N-β-CD with Au3+ was 1∶1, while the minimum detection limit of 3N-β-CD for I was 1.44×10–6 mol/L and the binding stoichiometry ratios of 3N-β-CD with I was 2∶1. In addition, the fluorescence intensity of 3N-β-CD gradually recovered when I was added into the mixed solution of 3N-β-CD and Au3+. Interestingly, the fluorescence intensity of 3N-β-CD also gradually recovered when Au3+ was added into the mixed solution of 3N-β-CD and I. The results exhibited that Au3+ and I could be used as fluorescence “on-off-on” to control the fluorescence behavior of 3N-β-CD, and thus enabled Au3+ and I to detect each other. On this basis, the logic gate controlling 3N-β-CD fluorescence switch was designed. This work provides a new apporach for the research and application of 3N-β-CD as a fluorescence “on-off-on” sensor.

Key words: mono-6-diethylenetriamine-β-cyclodextrin, gold ion, iodine ion, fluorescent switch, logic gate