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

A high selective “turn-on” fluorescent chemosensor for detection of Zn²⁺ in aqueous media

Juan Li, Shu-Zhen Zhang, Geng Guo, Hao-Ran Jia, and Yin-Xia Sun

School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China

E-mail: Sun_yinxia@163.com

Received: 6 February 2021  Accepted: 26 April 2021

Abstract:

A simple Schiff base fluorescent probe (SW) composed of oxime and salicylaldehyde units was designed and synthesized. The probe has high selectivity and sensitivity for Zn²⁺ ion in mixed solvent (DMSO/H₂O, V/V = 9:1). The fluorescence has obvious redshift phenomenon and visible color change. The stoichiometric ratio of the probe to Zn²⁺ ion was confirmed to be 1:2 (mole) by ¹H NMR, MS analysis and job curves. And the detection limit of fluorescence response of the SW to Zn²⁺ is down to 2.53 × 10^–8 mol/L. At the same time, the probe SW can be applied to the test paper detection of Zn²⁺ ions under 365 nm UV light and the detection of Zn²⁺ ions in actual water samples.

Keywords: Fluorescent probe; Schiff base containing oxime; Zn2+ recognition; Test paper; Actual water samples

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01684-x

Chemical Papers 75 (9) 4697–4706 (2021)