应用化学 ›› 2018, Vol. 35 ›› Issue (12): 1514-1520.DOI: 10.11944/j.issn.1000-0518.2018.12.180026

• 研究论文 • 上一篇    下一篇

一种可再生高选择性的硫化氢荧光探针

尹正日()   

  1. 延边大学理学院化学系 吉林 延吉 133002
  • 收稿日期:2018-01-29 接受日期:2018-03-28 出版日期:2018-12-05 发布日期:2018-12-10
  • 基金资助:
    国家自然基金(21262039)资助项目

A Renewable High Selective Fluorescent Probe for Hydrogen Sulfide

YIN Zhengri()   

  1. Department of Chemistry,College of Science,Yanbian University,Yanji,Jilin 133002,China
  • Received:2018-01-29 Accepted:2018-03-28 Published:2018-12-05 Online:2018-12-10
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21262039).

摘要:

为了方便地检测环境样品中的硫化氢,利用香豆素酰肼肟配体构建了一个基于其铜配合物的可再生高选择性的硫化氢荧光探针(1-Cu2+)。 顺磁性Cu2+的荧光猝灭作用使探针的荧光很弱。 Na2S溶液的加入可显著增强其荧光,其它常见阴离子(F-,Cl-,Br-,I-,CO32-,HPO42-,H2PO4-,NO2-,NO3-,SO42-,CH3COO-,N3-,S2O32-,CN-)对配合物探针的荧光影响很小,共存时也不会干扰探针对硫化氢的增强响应。 Cu2+的加入能够再生探针(1-Cu2+),通过依次加入Cu2+和S2- ,可重复地检测S2-。 该探针响应时间快(~5 s),在0.5~5.0 μmol/L的范围内对H2S响应呈线性,检测限低至37 nmol/L。

关键词: 香豆素酰肼肟, 铜配合物, 硫化氢, 可再生荧光探针, Turn-on型

Abstract:

For expedient detection of H2S in environmental samples, a renewable H2S fluorescent probe(1-Cu2+) was constructed based on a complex formed by coumarin hydrazide oxime fluorescent ligand and a Cu2+. The probe displays very weak emission owing to quenching effect of Cu2+. The emission could be enhanced in the presence of S2-, but no obvious changes in fluorescence intensity were observed upon the addition of other relevant anionic analytes(F-, Cl-, Br-, I-, CO32-, HPO42-, H2PO4-, NO2-, NO3-, SO42-, CH3COO-, N3-, S2O32-, CN-). That is to say the probe system exhibits a remarkably selective fluorescence “ON” behavior exclusively with sulfide. The probe could be regenerated by the addition of Cu2+, and therefore the probe could be utilized repeatedly to sense sulfide anions with Cu2+ and S2-. The detection limit of the fluorescent assay for sulfide is as low as ~37.0 nmol/L with a rapid response time(a few seconds), and the linear range is 0.5~4.0 μmol/L.

Key words: coumarin hydrazide oxime, Cu2+ complex, hydrogen sulfide, renewable fluorescent probe, turn-on type