A new Cu²⁺-selective reaction-based fluorescent probe 1 based on the semicarbazide-bearing derivative of 2-(2-aminophenyl)benzothiazole has been developed. Designed probe 1 exhibited turn-on-type fluorescence signaling behavior that was more prominent toward Cu²⁺ ions than to other environmentally relevant metal ions. The signaling of probe 1 was due to the Cu²⁺-induced hydrolysis of semicarbazide moiety to form its strongly fluorescent parent dye. Cu²⁺ signaling of probe 1 was not influenced by the presence of commonly encountered metal ions, and the detection limit was 1.71 × 10⁻⁸ M (1.1 ppb). As a practical application, the determination of Cu²⁺ in simulated semiconductor wastewater was conducted using a smartphone as a portable signal detection tool. For the color test analysis, enhanced reproducibility of Cu²⁺-sensing was realized using the grayscale image rather than the red, green, or blue channel image.

基于2-（2-氨基苯基）苯并噻唑的含氨基脲衍生物的新的基于Cu ²⁺的基于选择性反应的荧光探针1已经被开发。设计的探针1表现出对Cu ²⁺离子比对其他环境相关金属离子更显着的开启型荧光信号传导行为。探针1的信号传导是由于Cu ²⁺诱导的氨基脲部分水解形成了其强烈的荧光母体染料。探针1的Cu ²⁺信号转导不受常见金属离子的影响，检出限为1.71×10 ^-8 M（1.1 ppb）。在实际应用中，使用智能手机作为便携式信号检测工具进行了模拟半导体废水中Cu ²⁺的测定。对于颜色测试分析，使用灰度图像而不是红色，绿色或蓝色通道图像可实现增强的Cu ²⁺传感重现性。