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Short Paper | Regular issue | Vol 94, No. 9, 2017, pp.1719-1727
Published online, 14th July, 2017
DOI: 10.3987/COM-15-13242
A New Fluorescence Chemosensor for Hg2+ Based on Carbazole and Thiourea

Fang-fang Yin, Wei-ju Zhu, Min Fang, Zhen-yu Wu, Ying Xu, Hai-lun Wang, Yao Wang, and Cun Li*

*School of Chemistry and Chemical Engineering & Anhui Province Key Laboratory of Environmental-friendly Polymer Materials, Anhui University, Hefei 230601, China


A new thiourea-based Schiff-base (L) as a fluorescent chemosensor has been designed and synthesized, which exhibits selectivity toward Hg2+ by forming a 1:2 compound based on the method of Job’s plot. The detection limit was calculated to be 6.5×10-6 mol/L. The prominent recognizable changes of L could be observed by the naked eyes and fluorescence sensing conditions. The color of the L solution changed instantly from colorless to yellow after adding Hg2+ and returned to colorless by adding I. The coordination reaction was reversible.