摘要： An interesting chemically stable metal-organic framework, {(NC2H8)2[Cd(DMIPA)]·xG}n (G=guest molecules of H2O and DMA, DMA= N,N-Dimethylacetamide) (1), featuring a 4-connected uninodal {42.64} topology and 18 ? × 18 ? snow?ake-like channels along the c axis with exposed thioether groups, was assembled by employing a tetratopic polycarboxylate ligand of 5,5?-thiobisophthalic acid (H4DMIPA). Ligand-based photoluminescence and solvent-dependent ?uorescent intensities were exhibited in compound 1. Most strikingly, it showed remarkable sensitivity and selectivity toward Fe3+ ions under the presence of other metal ions. The photoluminescence quenching could be detected at a very low concentration of 1.62 ppm, and the maximum quenching e?ciency was found to be 97.2% at 0.175 mM. Signi?cantly, compound 1 can be recycled after use. The ?uorescence intensity and quenching percentage of 1 exhibited very little changes after being used for ten successive cycles (I0 = 6349–6093, and QP = 95.4–96.2%), indicating that 1 is a very promising MOFs-based sensor with remarkable sensitivity, selectivity, and reusability towards Fe3+ ions.