Synthesis and application of a dual-functional fluorescent probe for sequential recognition of Zn2+and glyphosate

Qiye Liu; Yanchao Yu; Mianyuan Wu; Xuexue Yan; Wenju Wu; Jun You

doi:10.1016/j.saa.2023.123221

Synthesis and application of a dual-functional fluorescent probe for sequential recognition of Zn²⁺and glyphosate

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15:303:123221. doi: 10.1016/j.saa.2023.123221. Epub 2023 Jul 30.

Authors

Qiye Liu¹, Yanchao Yu¹, Mianyuan Wu², Xuexue Yan¹, Wenju Wu¹, Jun You³

Affiliations

¹ Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China.
² Institute of Petrochemistry Heilongjiang Academy of Sciences, Harbin 150040, Heilongjiang, China.
³ Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China. Electronic address: yychao136@163.com.

PMID: 37544213
DOI: 10.1016/j.saa.2023.123221

Abstract

A novel fluorescent probe QL was designed and synthesized based on Schiff base by 2-hydrazinobenzothiazole to sequentially recognize Zn²⁺ and glyphosate. The probe QL was capable to detect Zn²⁺ in DMSO solution via fluorescence enhancement, and exhibited good selectivity and anti-interference ability. The combination mode was 1:2 between probe QL and Zn²⁺ according to the method of job's plot, and the detection limit of probe QL for Zn²⁺ was found to be 4.51 × 10^-8 M, which exhibited excellent sensitivity. Furthermore, the system QL-Zn²⁺ could detect glyphosate by causing fluorescence quenching response and with a color change from yellow to colorless for naked-eye detection. The detection limit for glyphosate was found to be 4.93 × 10^-8 M, which was far below the Standards for Drinking Water Quality (GB5749-2006) acceptable limits (0.7 μg/mL for glyphosate). Notably, the probe QL and its complex QL-Zn²⁺ have been successfully applied to detect Zn²⁺ and glyphosate in water, respectively.

Keywords: Fluorescent probe; Glyphosate; OFF-ON-OFF; Practical application; Zinc ions.