Fast response near-infrared fluorescent probe for hydrogen sulfide in natural waters

Yonglei Jin; Rui Liu; Zixuan Zhan; Yi Lv

doi:10.1016/j.talanta.2019.04.067

Fast response near-infrared fluorescent probe for hydrogen sulfide in natural waters

Talanta. 2019 Sep 1:202:159-164. doi: 10.1016/j.talanta.2019.04.067. Epub 2019 Apr 26.

Authors

Yonglei Jin¹, Rui Liu¹, Zixuan Zhan¹, Yi Lv²

Affiliations

¹ Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China.
² Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China; Analytical & Testing Center, Sichuan University, Chengdu, 610064, China. Electronic address: lvy@scu.edu.cn.

PMID: 31171164
DOI: 10.1016/j.talanta.2019.04.067

Abstract

Rapid and sensitive detection of hydrogen sulfide (H₂S) is of great importance for the environmental monitoring. Near-infrared fluorescent probes are recently developed for the sensitive H₂S detection thanks to their low background interference, while often hampered by relatively long response time (around 30 min). In this work, we reported a fast response (within 5 min), highly sensitive near-infrared (NIR) fluorescent probe (DCM-OCN) for H₂S. The rapid nucleophilic reaction between cyanate moiety and H₂S endowed fast response of the NIR probe. The influence of experimental parameters (including CTAB concentration, reaction time, pH value etc.), interference study, and possible mechanism were investigated in detail. The fluorescence increment was linear with H₂S concentration in 1-10 μM with a detection limit of 0.28 μM (3σ). The probe was successfully applied to environmental water samples including river water, tap water, lake water, mineral water and artificial wastewater.

Keywords: Environmental water samples; Fluorescent probe; H(2)S; NIR.