A dual-emission ratiometric luminescence probe based on Zr-MOFs for the efficient detection of Cu²⁺ in aqueous solutions

A novel dual-emission ratio luminescent probe (Eu(DPA)(3)@UIO-66-NH2) for the detection of Cu2+ in an aqueous solution was successfully prepared by linking the Zr-MOFs material UIO-66-NH2 with the lanthanide complex Na-3[Eu(DPA)(3)] through the interaction between functional groups. The synthesized Eu(DPA)(3)@UIO-66-NH2 inherits the advantages of MOFs and lanthanide complexes, and it not only has excellent luminescence performance but also shows good dispersion and structural stability in aqueous solution. The characteristics of dual-emission light can achieve specific ratiometric luminescence detection of Cu2+. In addition, the probe exhibited high sensitivity for the detection of Cu(2+ )with a detection limit as low as 0.89 mu M. It can provide an efficient and stable platform for the convenient and rapid detection of Cu2+ in aqueous solutions and has the potential for development applications.