Through a solvothermal reaction between the corresponding lanthanide(III) nitrate, 1,10 o-phenanthroline and pyridine 3,5-dicarboxylic acid ligands, a novel two-dimensional terbium-based metal-organic framework (Tb-MOF), named {Tb₂O_0.5(C₁₂H₈N₂)₂(C₇H₃NO₄)₃(H₂O)_2.75}_n (1) with strong fluorescence was synthesized by hydrothermal method. The single crystal structure and phase purity of the as-synthesized Tb-MOF were verified by single crystal X-ray diffraction. Subsequently, some studies on the morphology, structure, and optical properties of the compound were carried out. The results show that the synthesized Tb-MOF (1) can be used for the fluorescence sensing of nitrite and ferric ions. Simultaneously, the as-synthesized crystal structure offers good chemical stability in different environments, such as common organic solvents, solutions with a wide pH range, and aqueous solutions of metal ions. Besides, it has good chemical stability in a certain temperature range. In addition, a detection method for nitrite and iron ions was established based on the principle of fluorescence quenching of Tb-MOF by the analytical target, showing good recovery and precision. The proposed method provides a reliable new method for detecting nitrite and ferric ions concentrations in actual water samples.

通过相应的硝酸镧系元素（III），1,10邻菲咯啉和吡啶3,5-二羧酸配体之间的溶剂热反应，得到了一种新型的二维ter基金属-有机骨架（Tb-MOF），₂ O _0.5（C ₁₂ H ₈ N ₂）₂（C ₇ H ₃ NO ₄）₃（H ₂ O）_2.75 } _n（1）采用水热法合成了具有较强荧光的化合物。通过单晶X射线衍射验证了所合成的Tb-MOF的单晶结构和相纯度。随后，对该化合物的形态，结构和光学性质进行了一些研究。结果表明，合成的Tb-MOF（1）可用于亚硝酸根和三价铁离子的荧光传感。同时，合成后的晶体结构在不同的环境中提供了良好的化学稳定性，例如普通的有机溶剂，pH范围宽的溶液以及金属离子的水溶液。此外，在一定温度范围内具有良好的化学稳定性。此外，建立了一种以Tb-MOF为分析对象的荧光猝灭原理，建立了亚硝酸根和铁离子的检测方法，具有良好的回收率和精密度。该方法为检测实际水样中的亚硝酸根和三价铁离子提供了可靠的新方法。