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A highly selective and fast-response fluorescent probe based on Cd-MOF for the visual detection of Al3+ ion and quantitative detection of Fe3+ ion
Journal of Solid State Chemistry ( IF 3.2 ) Pub Date : 2017-12-28 , DOI: 10.1016/j.jssc.2017.12.033
Rui Lv , Zhihengyu Chen , Xin Fu , Boyi Yang , Hui Li , Jian Su , Wen Gu , Xin Liu

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.



中文翻译:

基于Cd-MOF的高选择性快速响应荧光探针,用于视觉检测Al 3+离子和定量检测Fe 3+离子

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。

更新日期:2018-01-11
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