Fluorescent Metal Organic Framework MIL-53(Al) for Highly Selective and Sensitive Detection of Fe3+ in Aqueous Solution
Fluorescent Metal Organic Framework MIL-53(Al) for Highly Selective and Sensitive Detection of Fe3+ in Aqueous Solution
复制标题
荧光金属有机框架 MIL-53(Al)，用于高选择性、高灵敏度检测水溶液中的 Fe3
DOI：
10.1021/ac401387z
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发表时间：
2013-08-06
影响因子：
7.4
通讯作者：
Yan, Xiu-Ping
中科院分区：
文献类型：
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作者：
Yang, Cheng-Xiong;Ren, Hu-Bo;Yan, Xiu-Ping
荧光金属有机骨架(MOF)在传感应用中受到了极大的关注。在这里，我们报道了荧光MIL-53(Al)用于高选择性和高灵敏度地检测水溶液中的Fe‘的探索。在MIL-53(Al)中，Fe3+与骨架金属离子Al3+之间的阳离子交换导致MIL-53(Al)的荧光猝灭，使强荧光的MIL-53(Al)转变为弱荧光的MIL53(Fe)，从而实现了对水溶液中Fe3+的高选择性和高灵敏度的检测，线性范围为3-200微米，检测下限为0.9/4M。对于150mM Fe3+的测定，没有发现0.8M Na+、0.35M K+、11 mM Cu2+、10 mM Ni2+、6 mM Ca~(2+)、Pb24和Al~(3+)、53 mM Mn2+、5 mM Co~(2+)和Cr3+、4 mM Hg2+、Cd~(2+)、Zn~(2+)和Mg~(2+)、3 mM Fe~(2+)、0.8 M C l-、60 mM NO2-和NO_3-、10 mM HPO42-、H_2PO_4-、SO32-、SO42-和HCOO-，8 mM CO32-、HCO3-和C2O42-，以及5 mM CH3COO-。用电感耦合等离子体质谱、X射线衍射谱、傅里叶变换红外光谱等方法研究了Fe‘对MIL-53(Al)荧光猝灭的可能机理。Fe‘与骨架Al3+之间的特殊阳离子交换行为以及MIL-53(Al)的良好稳定性使其能够高度选择性和灵敏地检测水溶液中的Fe3+。方法用于人尿中Fe3+的测定，加标回收率为98.2%~106.2%。
Fluorescent metal-organic frameworks (MOFs) have received great attention in sensing application. Here, we report the exploration of fluorescent MIL-53(Al) for highly selective and sensitive detection of Fe' in aqueous solution. The cation exchange between Fe3+ and the framework metal ion Al3+ in MIL-53(Al) led to the quenching of the fluorescence of MIL-53(Al) due to the transformation of strong-fluorescent MIL-53(Al) to weak-fluorescent MIL53(Fe), allowing highly selective and sensitive detection of Fe3+ in aqueous solution with a linear range of 3-200 mu M and a detection limit of 0.9 /4M. No interferences from 0.8 M Na+; 0.35 M K+; 11 mM Cu2+; 10 mM Ni2+; 6 mM Ca2+, Pb24, and Al3+; 53 mM Mn2+; 5 mM Co" and Cr3+; 4 mM Hg2+, Cd2+, Zn2+, and Mg2+; 3 inM Fe2+; 0.8 M Cl-; 60 mM NO2- and NO3-; 10 inM HPO42-, H2PO4-, SO32-, SO42-, and HCOO-; 8 mM CO32-, HCO3-, and C2O42-; and 5 mM CH3COO- were found for the detection of 150 mu M Fe3+. The possible mechanism for the quenching effect of Fe' on the fluorescence of MIL-53(Al) was elucidated by inductively coupled plasma-mass spectrometry, X-ray diffraction spectrometry, and Fourier transform infrared spectrometry. The specific cation exchange behavior between Fe' and the framework Al3+ along with the excellent stability of MIL-53(Al) allows highly selective and sensitive detection of Fe3+ in aqueous solution. The developed method was applied to the determination of Fe3+ in human urine samples with the quantitative spike recoveries from 98.2% to 106.2%.