A series of Tb-based metal-organic frameworks (Tb-MOFs) were successfully synthesized by a solvothermal method. The size and morphology of the as-obtained Tb-MOFs can be effectively controlled via regulating the experimental conditions such as the volume fraction of DMF and the molar ratio of Tb 3? to NaOH. It is found that all the samples exhibit strong green emissions under ultraviolet excitation, corresponding to 5 D 4 ? 7 F J transitions of Tb 3? . Interestingly, Tb-MOFs displayed an efficient and distinct luminescence quenching by Cu 2? in aqueous solutions. The competitive fluorescence detection experiments indicate that these Tb-MOFs sensors can be used as a high selective and sensitive sensor of Cu 2? detection with the detection limit of 10 lmolÁL -1 , which can be used as a promising fluorescence sensor for Cu 2? detection in daily life.

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