White‐Light‐Emitting Ln‐MOF as Luminescent Probe for Selective Detection of Nitroaromatic Compounds

Yihui Wang, Xitong Xiao, Jiayi Liu, Zhenghong Dong, Fengqin Wang, Xiaoqing Wang
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Abstract

Metal‐organic frameworks (MOFs) as an efficient and convenient sensing material for environmental pollutants have attracted widespread attention in recent years. Here in, we synthesized a series of lanthanide co‐doping MOFs, EuxTb1‐x‐MOFs (x=0, 0.005, 0.00667, 0.01, 0.02 and 1) under solvothermal conditions. The luminescence colors can be adjusted by changing metal molar mass ratios and altering excitation wavelength. Fortunately, a near white‐light‐emitting material Eu0.01Tb0.99‐MOF was obtained under the excitation at 350 nm, whose CIE coordinates of (0.3444, 0.3409) are very close to standard white light coordinates (0.3333, 0.3333). We further studied the fluorescence sensing performances of Eu‐MOF, Tb‐MOF and Eu0.01Tb0.99‐MOF towards NACs. The results indicate that all MOFs can selectively detect 4‐nitroaniline, 4‐nitrophenol and 2‐nitrophenol with good sensitivity and recyclability.
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白光发光 Ln-MOF 作为选择性检测硝基芳香族化合物的发光探针
近年来,金属有机框架(MOFs)作为一种高效便捷的环境污染物传感材料受到广泛关注。在此,我们在溶热条件下合成了一系列镧系元素共掺杂 MOFs--EuxTb1-x-MOFs(x=0、0.005、0.00667、0.01、0.02 和 1)。可以通过改变金属摩尔质量比和激发波长来调整发光颜色。幸运的是,在 350 纳米波长的激发下,我们得到了一种近白光发光材料 Eu0.01Tb0.99-MOF,其 CIE 坐标(0.3444,0.3409)与标准白光坐标(0.3333,0.3333)非常接近。我们进一步研究了 Eu-MOF、Tb-MOF 和 Eu0.01Tb0.99-MOF 对 NAC 的荧光传感性能。结果表明,所有 MOFs 都能选择性地检测 4-硝基苯胺、4-硝基苯酚和 2-硝基苯酚,并具有良好的灵敏度和可回收性。
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