A Disulfide-Linked Naphthalimide Dimer for Hg(II) Detection in Aqueous Solution |
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Authors: | Yamin Li Xiaoling Zhang Baocun Zhu Juan Xue Jilin Yan |
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Institution: | (1) Key Laboratory of Cluster Science of Ministry of Education, Department of chemistry, School of Science, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China;(2) Department of Chemistry, Suzhou University, Suzhou, 215123, People’s Republic of China; |
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Abstract: | A disulfide linked naphthalimide dimer probe was designed for mercury ion (Hg2+) recognition in this work. The recognition was based on the strong affinity of mercury for sulfur. The experimental results
revealed that the probe exhibited high selectivity and sensitivity toward Hg2+ in comparison to other metal ions via a turn-on and reversible response to Hg2+ in neutral buffer solution. More importantly, the probe demonstrated a linear response for Hg2+ over a concentration range from 0 to 150 μM with a detection limit of 0.38 μM, which is just the limit of the safe concentration for humans. Upon addition of 150 μM Hg2+, the enhancement of fluorescence reached a maximum (∼7-fold). The performances of the probe indicated that it could meet
the selectivity requirements for biomedical and environmental application and also was sensitive enough to detect Hg2+ in environmental and biological samples. |
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