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Paper | Regular issue | Vol 92, No. 7, 2016, pp.1204-1214
Published online, 20th May, 2016
DOI: 10.3987/COM-16-13475
A Colorimetric Chemosensor Based on Fluorescein for the Detection of Zn2+ in Aqueous Solution

Wei Wang, Ya-Nan Lei, Qing-Lei Liu, and Yan Gao*

*Department of Chemical Engineering, University of Science and Technology Liaoning, High-tech Zone of Anshan, Liaoning Province 114051, China


A novel quinoline-functionalized fluorescein derivative HL was designed and used as a colorimetric chemosensor for the detection of Zn2+ over other commonly coexistent metal ions in aqueous solution at pH 7.2. Studies on its binding with different metal ions revealed a noticeable naked eye color change in the presence of Zn2+. The mechanism has been supported by Job’s plot evaluation, MS and 1H NMR spectroscopic studies. The association constant and the detection limits of sensor HL to Zn2+ were determined as 1.17×105 M-1 and 5.7 nM. This excellent selectivity and sensitive of HL to Zn2+ exhibited its potential application value in the biological monitoring and tracking of Zn2+.