高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (4): 714.

• 研究论文 • 上一篇    下一篇

基于咪唑的荧光传感器对磷酸二氢根离子的高选择性识别

苏冬冬, 牛浩涛, 王莹, 何家骐, 程津培   

  1. 南开大学化学学院, 元素有机化学国家重点实验室, 天津 300071
  • 收稿日期:2009-05-31 出版日期:2010-04-10 发布日期:2010-04-10
  • 通讯作者: 何家骐, 男, 教授, 博士生导师, 主要从事物理有机化学研究. E-mail: jiaqihe@nankai.edu.cn
  • 基金资助:

    国家“九七三”计划项目(批准号: G2007CB808000)资助.

Imidazolium-based Fluorescent Chemosensor for Highly Selective Recognition of Dihydrogen Phosphate

SU Dong-Dong, NIU Hao-Tao, WANG Ying, HE Jia-Qi*, CHENG Jin-Pei   

  1. State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2009-05-31 Online:2010-04-10 Published:2010-04-10
  • Contact: HE Jia-Qi. E-mail: jiaqihe@nankai.edu.cn
  • Supported by:

    国家“九七三”计划项目(批准号: G2007CB808000)资助.

摘要:

设计并合成了基于咪唑基团的高选择性的荧光传感器, 分别利用荧光和紫外-可见光谱研究了其对阴离子的识别. 结果显示, 该类荧光传感器只在H2PO4-离子存在下发生显著的荧光猝灭现象, 并且产生一个新的荧光发射峰, 因此可用于乙腈溶液中H2PO4-的快速有效检测.

关键词: 咪唑; 荧光传感器; 阴离子识别

Abstract:

Due to the fundamental roles that anions play in a wide range of chemical and biological processes, numerous efforts have been devoted to the design of receptors capable of selectively binding and sensing anions. The development of selective receptors for phosphate anions is of particular interest because they play vital roles in a wide range of life processes, such as energy storage, signal transduction and gene construction. Herein, a new fluorescent chemosensor bearing two imidazolium groups as well as two anthracene groups were designed and synthesized. The anion recognition properties of the compound 1 were studied by the UV-Vis and fluorescent spectra in CH3CN. The results show that this chemosensor display a highly selective fluorescence quenching effect and a unique excimer peak only with H2PO4-. The fluorescence quenching effect can be ascribed to a photo-induced electron transfer(PET), which can be used to discriminate H2PO4- from the other anions tested. 1H NMR analysis revealed that both the imidazolium 2-CH and the amide NH were involved in the hydrogen bonding interactions with the anions.

Key words: Imidazolium; Fluorescent Chemosensor; Anion recognition

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