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A novel histidine-functionalized 1,8-naphthalimide-based fluorescent chemosensor for the selective and sensitive detection of Hg2+ in water

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Abstract

Hg2+ is one of the the most threatening heavy metal ions; thus, finding a quick and easy way to detect it is very important. In this study, we designed and synthesized a simple Hg2+ chemosensor Z, which bears carboxyl and imidazolyl moieties as the hydrophilic group site and Hg2+ binding site, whereas the naphthalimide moiety acts as the signal group. Interestingly, the sensor Z could dissolve in water and show high selectivity and sensitivity for Hg2+ in aqueous solution. Other coexistent competitive metal ions (Fe3+, Ag+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+, Cr3+, and Mg2+) had no interference in the process of detecting Hg2+. The detection limit of sensor Z towards Hg2+ was 1.785 × 10−7 M, which indicated its high detection sensitivity. Moreover, the immediate response of Z to Hg2+ provides a real-time detection method for Hg2+ in aqueous solution. In addition, sensor Z can undergo cyclic utilization.

Graphical abstract: A novel histidine-functionalized 1,8-naphthalimide-based fluorescent chemosensor for the selective and sensitive detection of Hg2+ in water

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Publication details

The article was received on 14 Dec 2016, accepted on 06 Mar 2017 and first published on 07 Mar 2017


Article type: Paper
DOI: 10.1039/C6NJ03930H
Citation: New J. Chem., 2017, Advance Article
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    A novel histidine-functionalized 1,8-naphthalimide-based fluorescent chemosensor for the selective and sensitive detection of Hg2+ in water

    Y. Zhang, K. Zhong, J. Su, X. Chen, H. Yao, T. Wei and Q. Lin, New J. Chem., 2017, Advance Article , DOI: 10.1039/C6NJ03930H

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