Journal
ANALYTICA CHIMICA ACTA
Volume 1127, Issue -, Pages 49-56Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.06.050
Keywords
Near-infrared; Fluorescent probe; Hydrogen sulfide; Food sample; Bioimaging
Categories
Funding
- Natural Science Foundation of Liaoning Province [2020-MS-289]
- National Natural Science Foundation of China [21878023, U1608222]
- Program for Distinguished Professor of Liaoning Province
- Liaoning Revitalization Talents Program [XLYC1807133]
- First-class Discipline Project of Liaoning Province
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With the merits of non-destructive, high penetration ability and minimizing autofluorescence, nearinfrared (NIR) fluorescent probes have attracted much attention. In this paper, a NIR emission fluorescent turn-on probe THQ-L for H2S was synthesized by the knoevenagel condensation between tetrahydroquinoxaline-6-formaldehyde derivative and 2-benzothiazoleacetonitrile. THQ-L can recognize H2S through tandem reaction triggered by HS- to construct 1,4-diethylpiperazine-modified iminocoumarin-benzothiazole, which produces a strong red fluorescent signal. THQ-L displayed an excellent selectivity toward H2S, a large stokes shift (126 nm), a high signal-to-noise ratio (200-fold), the detection limits of 38.3 nM in PBS (10 mM, pH 7.4, 30% THF). The application study indicates that THQ-L can sensitively detect H2S in red wine, natural waters, living cells and can be prepared for a test paper strip for the qualitative detection of H2S. (C) 2020 Elsevier B.V. All rights reserved.
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