Lanthanide coordination polymers (LnCPs) have great potential in luminescent sensing and other fields due to their unique f-orbital properties. While high coordination numbers bring about structural diversity, they also pose difficulties in structural regulation. It is particularly important to achieve functional structural regulation of lanthanide coordination polymers and minimize the unpredictability of structural synthesis and functional research. Meanwhile, developing luminescent sensing properties for lanthanide elements other than Eu and Tb and expanding their application fields remains challenging. The rapid identification of CH3OH and C2H5OH, as well as H2O and D2O, is of great significance for human ecological health, industry, and scientific research. In this work, two types of LnCPs (L1-Ln-1 and L1-Ln-2) were synthesized by a solvent-controlled method using sodium isophthalic acid sulfonate as ligand, and Eu/Tb and Sm/Tb-doped dual-emitting materials were prepared. Among them, L1-Eu0.2Tb0.8-1 and L1-Sm0.8Tb0.2-1 can achieve visual differentiation between CH3OH and C2H5OH through changes in luminescence intensity ratio and CIE chromaticity coordinates; L1-Eu0.14Tb0.86-2 with excellent water stability can quantitatively and qualitatively detect the content of D2O in the H2O-D2O mixed system, and achieve visible luminescence changes from green to orange with a detection limit of 5 × 10-5 (v/v), and has good cyclic performance. The PMMA composite films prepared from both types of materials demonstrate potential for portable and stable practical applications.
Wang et al. (Tue,) studied this question.