A simple but highly sensitive and selective colorimetric and fluorescent probe for Cu2+ in aqueous media |
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Authors: | Li Yamin Zhang Xiaoling Zhu Baocun Xue Juan Zhu Zhi Tan Weihong |
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Institution: | 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. |
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Abstract: | In this paper, CN-DPA was prepared as an effective colorimetric and fluorescent probe for copper ions (Cu(2+)) in aqueous solution. It exhibits good sensitivity and selectivity for Cu(2+) over other metal ions both in aqueous solution and on a simple colorimetric paper-made test kit. Upon addition of Cu(2+), a remarkable color change from purple to colorless was easily observed by the naked eye, and a fluorescence quenching was also determined. Furthermore, CN-DPA can be used to quantitatively detect Cu(2+). The linear range was 0-5 μM determined by absorption spectrometry. All these selective and sensitive results indicate that CN-DPA could meet the selective requirements for biomedical and environmental application and be sensitive enough to detect Cu(2+) in environmental water samples, even in drinking water, which has a limit of 20 μM defined by the U.S. Environmental Protection Agency. |
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