Copper is a ubiquitous metal in the environment. Due to the complexity of traditional
detection techniques, searching for a selective and sensitive probe to quantify the
concentration of copper ions is of great significance. Herein, a novel fluorescent probe (CDs-
PCN) was synthesized by the post-synthetic modification of PCN-224 with carbon dots. In
this probe, the emission of carbon dots was utilized as a reference signal, and the emission
of PCN-224 was taken as a sensitive response signal with the active sites for detecting …