A simple but highly sensitive and selective colorimetric and fluorescent probe for Cu(2+) in aqueous media

作者：Li Yamin; Zhang Xiaoling^*; Zhu Baocun; Xue Juan; Zhu Zhi; Tan Weihong

来源：Analyst, 2011, 136(6): 1124-1128.

DOI：10.1039/c0an00682c

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 mu M 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 mu M defined by the U. S. Environmental Protection Agency.

• 出版日期2011
• 单位北京理工大学