Two novel 2D Ln–Cd HMOFs [Ln2Cd3(EDTA)3(H2O)11](H2O)14 (Ln = Sm 1; Eu 2; H4EDTA = ethylene diamine tetraacetic acid) based on nanosized heart-like Ln6Cd6O12 wheel-clusters were hydrothermally synthesized and characterized. The luminescence sensing of 2 to the polarization and concentration of cations was discussed.
