![]() Among the compounds emitting in the visible region, 4 Tb presents a high QY of 63%, which may be explained according to computational calculations. On the one hand, compound 5 Yb displays characteristic lanthanide-centered bands in the NIR with sizeable intensity even at room temperature. Photoluminescence measurements in solid state at variable temperatures reveal the best-in-class properties based on the capacity of the 5Meip ligand to provide efficient energy transfers to the lanthanide(III) ions, which brings intense emissions in both the visible and near-infrared (NIR) regions. ![]() Crystal structures consist of 3D frameworks tailored by the linkage between infinite lanthanide(III)-carboxylate rods by means of the tetradentate 5Meip ligands. ![]() ![]() The work presented herein reports on the synthesis, structural and physico-chemical characterization, luminescence properties and luminescent sensing activity of a family of isostructural coordination polymers (CPs) with the general formula n (where Ln(III) = Sm ( 1 Sm), Eu ( 2 Eu), Gd ( 3 Gd), Tb ( 4 Tb) and Yb ( 5 Yb) and 5Meip = 5-methylisophthalate, DMF = N,N-dimethylmethanamide).
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