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.
Analyst. 2011 Mar 21;136(6):1124-8. doi: 10.1039/c0an00682c. Epub 2011 Jan 6.
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.
本文制备了 CN-DPA，将其作为一种在水溶液中用于检测铜离子（Cu(2+)）的有效比色和荧光探针。它在水溶液中和简单的比色纸质试剂盒中对 Cu(2+)具有良好的灵敏度和选择性，对其他金属离子的选择性也很高。加入 Cu(2+)后，通过肉眼可以很容易地观察到从紫色到无色的明显颜色变化，同时荧光也被猝灭。此外，CN-DPA 可用于定量检测 Cu(2+)。通过吸收光谱法测定的线性范围为 0-5 μM。所有这些选择性和灵敏性的结果表明，CN-DPA 可以满足生物医学和环境应用的选择性要求，并且足够灵敏，可以检测环境水样中的 Cu(2+)，甚至在饮用水中，美国环境保护署（U.S. Environmental Protection Agency）规定的限量为 20 μM。
