Abstract
A new efficient and practical fluorescent probe 6-(benzo[d]thiazol-2-yl)naphthalen-2-yl-thiophene-2-carboxylate (probe 1) was synthesized to detect hydrogen sulfide (H2S). The addition of H2S caused the solution of probe 1 to change from colorless to yellow, and the solution of probe 1 changes to different colors with respect to different concentrations of H2S. Importantly, probe 1 could help detect H2S efficiently by a distinct color response as a visible detection agent. Probe 1 reacted with various concentrations of H2S (0–200 μM), and the detection limit for H2S was 0.10 μM. Particularly, probe 1 can be applied as a sensor to detect H2S accurately in wine samples.
Highlights
Hydrogen sulfide (H2S) has unpleasant rotten egg smell [1, 2]
Probe 1 was obtained so that compound 3 and thiophene-2-carbonyl chloride performed an esterification reaction. is synthetic process and the purification of silica gel column chromatographic separation were easy. 1H NMR and 13C NMR (Figures S1 and S2) were used to determine the structure of 6-(benzo[d]thiazol-2-yl)naphthalene-2-ol, light yellow powder. e structure of Probe 1 was characterized by 1H NMR, 13C NMR, and high-resolution mass spectrum (HRMS) (Figures S3–S5)
We developed a sensitive and visible colorimetric fluorescent probe to detect H2S. e function of probe 1 relies on H2S-induced make thenoic acid ether group cleave, and the produced fluorophores (6-(benzo[d] thiazol-2-yl)naphthalen-2-ol and compound 3 were verified by GC-MS studies
Summary
Hydrogen sulfide (H2S) has unpleasant rotten egg smell [1, 2]. H2S is a significant compound in wine, and a detection threshold value is measured from 1.1 to 1.6 μg/ L [3]. H2S affects the quality of wines and causes economic losses [7, 8]
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