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A fluorescent turn-on probe based on coumarin-thiourea conjugate for Hg2+ detection in a wide pH range

Yanxi Song, Mengjie Yan, Xiaofeng Xia, Zhixiu Pan, Jinjiang Shi, Hongqi Li, and Peihong Cong

College of Environmental Science and Engineering, Donghua University, Shanghai, China

 

E-mail: hongqili@dhu.edu.cn

Received: 5 November 2022  Accepted: 10 March 2023

Abstract:

A fluorescent probe (probe C) based on coumarin-thiourea conjugate was developed for selective detection of Hg2+. Addition of Hg2+ to probe C induced obvious enhancement of the fluorescence intensity. Probe C exhibited good selectivity toward Hg2+ and good anti-interference performance over other common competitive metal ions including Na+, K+, Ag+, Cu2+, Zn2+, Co2+, Ni2+, Mn2+, Mg2+, Fe2+, Fe3+, Ca2+ and Al3+. The detection limit of probe C for Hg2+ was calculated to be 0.44 nM. It was capable of detecting Hg2+ ion in a wide pH range of 1.0–10.0.

Keywords: Fluorescence; Probe; Coumarin-thiourea; Mercury

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02778-4

 

Chemical Papers 77 (8) 4297–4305 (2023)

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