Specifically, visually, and quantitatively monitor copper ion (Cu²⁺) 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 Cu²⁺ 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^2-. Furthermore, electrospinning technique was employed to fabricate a probe composited fluorescent sensing film (PMMA) for realizing the visual and recyclable monitoring of Cu²⁺, indicating that the probe-composited fluorescent sensing film has great potential for on-site and naked-eye detection of Cu²⁺ in practical.

具体而言，在生物和环境检测领域，视觉上和定量地监测铜离子（Cu ²⁺）至关重要。在此，构建了带有苯并恶唑附加的黄嘌呤骨架的比例荧光探针，并进一步用于监测Hela细胞，真实水样和试纸中的Cu ²⁺。在便携式紫外线灯（365 nm）下，用肉眼可观察到易于区分的比色（无色至红色）和荧光（绿色至红色）变化，可通过添加S ^2-来恢复这种变化。此外，采用静电纺丝技术制备了探针复合荧光传感膜（PMMA），以实现对Cu ²⁺的可视化和可回收监控。，表明在实践中，复合探针的荧光传感膜具有现场和肉眼检测Cu ^2+的巨大潜力。