高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (8): 1785.doi: 10.7503/cjcu20200156

• 有机化学 • 上一篇    下一篇

高选择性检测Hg2+的喹啉酮衍生物荧光探针的合成及应用

张成路1, 孙越冬1, 王静2, 何钰1, 张彦鹏1, 张璐1, 宋府璐1   

  1. 1. 辽宁师范大学化学化工学院, 大连 116029;
    2. 中钢集团鞍山热能研究院有限公司, 煤焦油系新型材料制备技术国家地方联合工程中心, 鞍山 114044
  • 收稿日期:2020-03-20 出版日期:2020-08-10 发布日期:2020-07-31
  • 通讯作者: 张成路,男,博士,教授,主要从事荧光探针方面的研究.E-mail:zhangchenglu@lnnu.edu.cn E-mail:zhangchenglu@lnnu.edu.cn
  • 基金资助:
    辽宁省教育厅科学技术资助项目(批准号:2009A426)资助.

Synthesis and Application of Quinolinone Derivative Fluorescent Probe for High Selective Detection of Hg2+

ZHANG Chenglu1, SUN Yuedong1, WANG Jing2, HE Yu1, ZHANG Yanpeng1, ZHANG Lu1, SONG Fulu1   

  1. 1. College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China;
    2. Sinosteel Anshan Research Institute of Thermo-energy Co., Ltd, National Local United Engineering Research Center for Preparing Technology of Coal-tar Based New Materials, Anshan 114044, China
  • Received:2020-03-20 Online:2020-08-10 Published:2020-07-31
  • Supported by:
    Supported by the Science and Technology Project of Liaoning Education Department, China(No.2009A426).

摘要: 设计合成了一种以喹啉酮为荧光团,具有新型结构的荧光探针(E)-N-(4-甲基-2-氧代-1,2-二氢喹啉-7-基)-3-(3-苯基-[1,2,4]三唑[3,4-b][1,3,4]噻二唑-6-基)丙烯酰胺(MNT).研究结果表明,MNT可通过不饱和酰胺键异构化后与Hg2+配位,从而产生显著的荧光猝灭.1,2,4-三唑[3,4-b]-1,3,4-噻二唑缺电子的特征有助于提高猝灭效果的同时,能提供与Hg2+配位的杂原子.MNT探针对Hg2+具有高选择性、较高的量子产率和较强的抗干扰性,检测限为6.35×10-8 mol/L,响应时间25 s.进一步研究发现,MNT在pH=4~13范围内均能特异性检测Hg2+.基于核磁滴定实验结果推测了该探针荧光检测Hg2+的机理,并由Job’s曲线确定了MNT与Hg2+之间的配位比为2:1.MNT在实际水样中的应用结果表明其可作为检测Hg2+的荧光探针.

关键词: 喹啉酮, 1,2,4-三唑[3,4-b]-1,3,4-噻二唑, 荧光识别, Hg2+

Abstract: In order to well-directed fluorescence recognize and detect Hg2+, according to the coordination characteristics of Hg2+, a novel fluorescent probe (E)-N-(4-methyl-2-oxo-1,2-dihydroquinolin-7-yl)-3-(3-phenyl-[1,2,4]triazolo[3,4-b] [1,3,4]thiadiazol-6-yl)acrylamide(MNT) was designed and synthesized, which quinolinone block was used as fluorophore. The results showed that MNT could coordinate with Hg2+ after the isomerization of amide bond, therefore the fluorescence quenching was generated. 1,2,4-Triazole[3,4-b]-1,3,4-thiadiazole had the characteristic of lacking electrons, which could improve the quenching effect and coordinate with Hg2+. The probe MNT had higher selectivity, higher quantum yield and stronger anti-interference for Hg2+. The detection limit was 6.35×10-8 mol/L, the response time was 25 s. The research also found that MNT could determine Hg2+ in the range of pH 4-13. The fluorescence detection mechanism was speculated through nuclear magnetic titration experiments and the coordination ratio 2:1 was determined by Job's curve. The results of the application in practical water samples indicated that MNT could be used as a fluorescent probe for Hg2+.

Key words: Quinolinone, 1,2,4-Triazole[3,4-b]-1,3,4-thiadiazole, Fluorescence recognition, Hg2+

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