A novel bifunctional fluorescent and colorimetric probe for detection of mercury and fluoride ions

Liang Gu; Tao Zheng; Zhenxiang Xu; Yanxi Song; Hongqi Li; Shengtao Xia; Li Shen

doi:10.1016/j.saa.2018.08.060

A novel bifunctional fluorescent and colorimetric probe for detection of mercury and fluoride ions

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Jan 15:207:88-95. doi: 10.1016/j.saa.2018.08.060. Epub 2018 Aug 29.

Authors

Liang Gu¹, Tao Zheng¹, Zhenxiang Xu², Yanxi Song³, Hongqi Li⁴, Shengtao Xia¹, Li Shen¹

Affiliations

¹ Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai 201620, PR China.
² Penglai Xinguang Pigment Chemical Co., Ltd, Penglai 265601, PR China.
³ College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, PR China.
⁴ Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai 201620, PR China. Electronic address: hongqili@dhu.edu.cn.

PMID: 30205308
DOI: 10.1016/j.saa.2018.08.060

Abstract

A fluorescent and colorimetric probe L1 based on a simple coumarin derivative for detection of Hg²⁺ and F^- ions was developed. Upon addition of Hg²⁺ and F^- ions, L1 underwent desulfurization and desilylation, respectively, to induce marked increase in the fluorescence intensity and sharp color change from light yellow to dark purple and light brown, respectively. Probe L1 could be used for sensing and for quantitative measurement of Hg²⁺ and F^- ions by both UV-vis and fluorescence spectra. The bifunctional probe exhibited a high selectivity over other competitive cations and anions and could be used in both organic and aqueous media over a wide pH range.

Keywords: Colorimetric; Coumarin; Fluorescent; Fluoride; Mercury; Probe.