影像科学与光化学 ›› 2016, Vol. 34 ›› Issue (5): 435-443.DOI: 10.7517/j.issn.1674-0475.2016.05.435

• 论文 • 上一篇    下一篇

比率型SO2荧光探针的构建及细胞成像研究

熊超, 段冲, 徐俊超, 何媛媛, 张悦, 曾林涛   

  1. 天津理工大学 化学化工学院, 天津 300384
  • 收稿日期:2016-07-27 修回日期:2016-08-11 出版日期:2016-09-15 发布日期:2016-09-15
  • 通讯作者: 曾林涛
  • 基金资助:

    国家自然科学基金(21203138)和天津理工大学国家级大学生创新训练项目(201510060009)资助

Construction of a Ratiometric Fluorescent Probe for SO2 Derivative and Its Application for Cell Imaging

XIONG Chao, DUAN Chong, XU Junchao, HE Yuanyuan, ZHANG Yue, ZENG Lintao   

  1. School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
  • Received:2016-07-27 Revised:2016-08-11 Online:2016-09-15 Published:2016-09-15

摘要:

本文构建了一种基于苯并吲哚季铵盐结构的荧光探针用于检测SO2衍生物。该荧光探针能够快速、灵敏、高选择性地检测HSO3-和SO32-,并显示出颜色和荧光变化双重响应。其比率荧光强度(I462/I588)与HSO3-的浓度(0~16 μmol/L)之间具有良好的线性关系,检测限低至12 nmol/L。1HNMR表明该探针的响应机制为1,4-亲核加成反应。激光共聚焦荧光成像结果表明,CZBI具有良好的细胞膜通透性,并且可以通过比率荧光成像实现对细胞内SO2衍生物的监测。

关键词: 荧光探针, SO2, 苯并吲哚, 比率, 细胞成像

Abstract:

In this study, we report a ratiometric fluorescent probe (CZBI) for sulfur dioxide (SO2) derivatives based on the conjugate of carbazole and benzo[e]indolium, which displays colorimetric and ratiometric fluorescence dual response to HSO3-/SO32-. The probe can quantitatively detect HSO3- with high specificity, fast response (within 40 s) as well as low detection limit (12 nmol/L). The fluorescence intensity ratios were linearly related to the concentrations of bisulfite ranging from 0 to 16 μmol/L. A 1, 4-nucleophilic addition reaction was proposed for the sensing mechanism of this probe, which was confirmed by 1HNMR spectra. Fluorescence imaging of HeLa cells indicated that CZBI could be used for monitoring the intrinsically generated intracellular SO2 derivatives in living cells by ratiometric fluorescence imaging.

Key words: fluorescent probe, SO2, benzoindole, ratiometric, cell imaging