Reversible dual channel sensor F2 for detection Cu²⁺ is designed and synthesized. F2 is substantially unaffected by other cationic ions during the recognition of Cu²⁺. It is worth noting that the low detection limit of sensor F2 is 9.09 × 10⁻⁹, and the detection limit is lower that to the reported sensor for identifying Cu²⁺. Through various experiments and characterization, it is proved that ligand-metal charge transfer (LMCT) is the interaction mechanism between F2 and Cu²⁺. It is further certified that the stoichiometry between F2 and Cu²⁺ is 1:1. In addition, the fluorescence changes of F2 upon the addition of Cu²⁺ and EDTA are applied as an ultrasensitive IMPLICATION logic gate at the molecular level. At the same time, molecular keyboard experiments have achieved information protection at the molecular level. More importantly, the test strips containing F2 can be easily and quickly tested to achieve on-site inspection.

设计并合成了用于检测Cu ^2+的可逆双通道传感器F2。在识别Cu ^2+的过程中，F2基本不受其他阳离子的影响。值得注意的是，传感器F2的低检测限为9.09×10 ^-9，且检测限低于报告的用于识别Cu ^2+的传感器。通过各种实验和表征，证明配体-金属电荷转移（LMCT）是F 2和Cu ²⁺之间的相互作用机理。进一步证明F2和Cu ²⁺之间的化学计量是1：1。此外，添加Cu ²⁺和EDTA后F2的荧光变化在分子水平上被用作超灵敏的IMPLICATION逻辑门。同时，分子键盘实验已经在分子水平上实现了信息保护。更重要的是，包含F2的测试条可以轻松快速地进行测试以实现现场检查。