A new luminescent Cd(II)-based metal-organic framework, [Cd(PAM)(4-bpdb)_1.5]·DMF (Cd-MOF, PAM = 4,4′-methylenebis(3-hydroxy-2-naphthalene-carboxylic acid) and 4-bpdb = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene) was successfully synthesized by solvothermal synthesis method. The Cd-MOF reveals excellent luminescence property which can selectively detect Al³⁺ and Fe³⁺ ions among other interfering metal ions. The detection limit is 0.56 µM for Al³⁺ ion in aqueous solutions, and it is obvious lower than the maximum standard of Al³⁺ ion in drinking water of 7.41 µM which is defined by the WHO. More importantly, the Cd-MOF shows an obvious luminescent color change from yellow to blue under the UV lamp irradiation at 365 nm with the dropping of Al³⁺ ion, which can make it apply to the visual detection. And, the detection based on the test paper was explored for the first time. In addition, the Cd-MOF can also be used for quantitative detecting Fe³⁺ ion, and the LOD for Fe³⁺ ion can be as low as 0.3 µM which is lower than most reported MOFs. It is worth noting that Fe³⁺ and Al³⁺ ions can not interfere with each other. These properties make it become an excellent luminescence sensor for the detection of Al³⁺ and Fe³⁺ ions.

一种新的基于Cd（II）的发光金属-有机骨架[Cd（PAM）（4-bpdb）_1.5 ]·DMF（Cd-MOF，PAM = 4,4'-亚甲基双（3-羟基-2-萘-溶剂热合成法成功合成了4-bpdb = 1,4-双（4-吡啶基）-2,3-二氮杂-1,3-丁二烯）。Cd-MOF具有出色的发光性能，可以选择性地检测其他干扰金属离子中的Al ³⁺和Fe ³⁺离子。水溶液中 Al ³⁺离子的检出限为0.56 µM，明显低于饮用水中Al ³⁺离子的最高标准7.41 µM，由WHO定义。更重要的是，Cd-MOF在365  nm的紫外灯照射下，随着Al ³⁺离子的滴落而呈现出明显的从黄色到蓝色的发光颜色变化，可应用于视觉检测。并且，首次探索了基于试纸的检测。此外，在CD-MOF也可用于定量检测的Fe ³⁺离子，和用于铁的LOD ³⁺离子可以是低至0.3  μM这比大多数报道的MOF低。值得注意的是，Fe ³⁺和Al ³⁺离子不会相互干扰。这些特性使其成为检测Al ³⁺和Fe的出色发光传感器³⁺离子。