Issue 88, 2016

A dual functional probe: sensitive fluorescence response to H2S and colorimetric detection for SO32−

Abstract

Hydrogen sulfide (H2S) and sulfite (SO32−) are two important sulfur-containing species that play different and important roles in industrial and biological processes. Accordingly, the development of efficient methods for simple, rapid, sensitive and selective monitoring of H2S and SO32− is of the utmost importance in both environmental and biological sciences. In this study, we developed a new dual functional probe NIR-DNP for discriminative detection of H2S and SO32−. This probe can sense H2S and SO32− via two different approaches, a significant near-infrared fluorescence enhancement and color change from purple to cyan induced by H2S as well as a visible color change from purple to colorless caused by SO32−. The detection limits of the probe NIR-DNP for H2S and SO32− in aqueous solutions were 36.53 nM and 33.33 nM, respectively. Competitive experiments demonstrated that the probe NIR-DNP had a high fluorescence selectivity for H2S and excellent colorimetric selectivity for SO32− over other analytes. The sensing mechanism of the probe toward H2S and SO32− was based on the H2S-induced thiolysis of dinitrophenyl ether and SO32−-induced nucleophilic addition, respectively. Further investigation showed that the probe NIR-DNP could be used to develop an easy-to-prepare and easy-to-detect paper-based test strip for cheap and effective detection of SO32−. Also, the probe NIR-DNP has the potential to image exogenous and endogenous H2S in living cells.

Graphical abstract: A dual functional probe: sensitive fluorescence response to H2S and colorimetric detection for SO32−

Supplementary files

Article information

Article type
Paper
Submitted
10 Jun 2016
Accepted
24 Aug 2016
First published
25 Aug 2016

RSC Adv., 2016,6, 85529-85537

A dual functional probe: sensitive fluorescence response to H2S and colorimetric detection for SO32−

S. Chen, C. Ma, M. Yuan, W. Wang, D. Wang, S. Chen and J. Wang, RSC Adv., 2016, 6, 85529 DOI: 10.1039/C6RA15065A

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