Fluorescent sensing film decorated with ratiometric probe for visual and recyclable monitoring of Cu.

Specifically, visually, and quantitatively monitor copper ion (Cu) is critical in the area of biological and environmental detection. Herein, a ratiometric fluorescent probe with benzoxazole appended xanthenes skeleton was constructed and further employed to monitor Cu in Hela cells, real water samples, and test strips. An easily distinguishable colorimetric (colorless to red) and fluorescence (green to red) change could be observed by naked eye under the portable UV lamp (365 nm) and the changes could be recovered by adding S. Furthermore, electrospinning technique was employed to fabricate a probe composited fluorescent sensing film (PMMA) for realizing the visual and recyclable monitoring of Cu, indicating that the probe-composited fluorescent sensing film has great potential for on-site and naked-eye detection of Cu in practical.