Title:An Aminoantipyrine-containing Schiff base Fluorescent Chemosensor for
Hg2+-Selective Detection
Volume: 20
Issue: 10
Author(s): Xuelei He*, Shijie Song, Chengke Li, Qiangqiang Zhang, Qiang Dong, Lin Li, Yonggang Qin, Qiang Zhao and Jianxiong Wang
Affiliation:
- Shaanxi Coal and Chemical Industry Group YuLin Chemical Co., Ltd, Yulin, Shaanxi, 719000, China
Keywords:
Aminoantipyrine, fluorescence, Hg2+, Schiff base, metal ion recognition, sensor.
Abstract: Specific recognition at trace quantity levels of metal ions without using the costly analytical
instrument and a tedious sample preparation method is an extensive concern for environmental
monitoring and mitigation. Mercury(II) (Hg2+) has acute toxicity. The development of ion-selective
fluorescence sensors for the selective detection of Hg2+ is an essential task to accomplish. The aim of
this study is to detect Hg2+ in an aqueous medium. A fluorescence sensor (DP) based on Schiff base
was designed and utilized to detect Hg2+. Scanning electron microscope (SEM), Fourier transformed
Infrared (FT-IR), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were
used to learn the sensing mechanism between sensor DP and Hg2+ cations. When Hg2+ ions were added
to the sensor DP, it showed a dramatic fluorescent “turn-on” response for Hg2+ in dimethylformamide
(DMF) solution. And the detection limit (LOD) of DP for Hg2+ in aqueous media (1.0 mol L-1)
was 2.23 × 10-8 mol L-1. In summary, an aminoantipyrine-containing Schiff base fluorescent
chemosensor for extraordinary recognition of Mercury(II) was designed and synthesized via a simple
one-step pathway and led to intermolecular self-assembly through π-π stacking interactions. And the
sensor DP could fluorescently “turn on” when the Hg2+ cation was added. The limitation of Hg2+ was
2.23×10-8 M, which indicated that the sensor DP could be useful as a highly selective and sensitive
sensor for detecting Hg2+ ions in an aqueous medium by the strong interaction with DP. Notably, the
sensor DP was used as a fluorescent display material with satisfactory results.