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
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
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DOI：
10.1016/j.jssc.2017.12.033
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发表时间：
2018-03-01
影响因子：
3.3
通讯作者：
Liu, Xin
中科院分区：
文献类型：
--
作者：
Lv, Rui;Chen, Zhihengyu;Liu, Xin
采用溶剂热合成法合成了一种新型的Cd（II）基金属有机骨架发光材料[Cd（PAM）（4-bpdb）（1.5）]中心点DMF（Cd-MOF，PAM = 4，4 '-亚甲基双（3-羟基-2-萘甲酸），4-bpdb = 1，4-双（4-吡啶基）-2，3-二氮杂-1，3-丁二烯）。Cd-MOF显示出优异的发光性能，可以选择性地检测Al 3+和Fe 3+离子以及其他干扰金属离子。水溶液中Al ~（3+）离子的检出限为0.56 μ M，明显低于世界卫生组织规定的饮用水中Al ~（3+）离子的最大限量7.41 μ M。更重要的是，随着Al 3+离子的下降，在365 nm的紫外灯照射下，Cd-MOF显示出明显的发光颜色变化，由黄色变为蓝色，可以应用于视觉检测。并首次探索了基于试卷的检测方法。此外，Cd-MOF还可用于Fe ~（3+）离子的定量检测，其检测限可低至0.3 μ M，低于大多数已报道的MOF。值得注意的是，Fe 3+和Al 3+离子不能相互干扰。这些性质使其成为一种优良的发光传感器，用于检测铝离子和铁离子。
A new luminescent Cd(II)-based metal-organic framework, [Cd(PAM)(4-bpdb)(1.5)]center dot 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-buta-diene) 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 mu M for Al3+ ion in aqueous solutions, and it is obvious lower than the maximum standard of Al3+ ion in drinking water of 7.41 mu M 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 mu M 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.