A Long-wavelength Colorimetric and Fluorescent Chemodosimeter for Monitoring Cu in the Environment and Living Systems.

A novel long-wavelength fluorescent chemodosimeter based on rhodamine was constructed to monitor Cu in the environment and living systems. With the addition of Cu, this chemodosimeter responded rapidly within 5 s and the fluorescence intensity increased about 100 times within 10 s. The color of chemodosimeter solution changed from colorless to pink in natural light, while there was an obviously fluorescence changed from colorless to red under a 365 nm UV lamp. The fluorescence intensity (588 nm) showed a satisfactory linear relationship (R = 0.9878) with Cu concentration (0-10 μM) with the detection limit of 7.53 nM. Biological imaging experiments of cells and soybean sprouts showed that the chemodosimeter could successfully detect Cu in living systems. In addition, the chemodosimeter could be used to monitor Cu in real water samples. All in all, this study offers a promising analytical tool for monitoring Cu in the environment and living systems.