ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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)