College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Apr 15;251:119464. doi: 10.1016/j.saa.2021.119464. Epub 2021 Jan 14.
Dyes detection remains a serious task because of their high toxicity. In present work, designed Eu functionalized Zr-metal-organic framework (Eu@Zr-MOF-808) as fluorescent probe was constructed via post-synthetic modification (PSM) for rapid monitoring four most commonly used dyes (malachite green (MG), brilliant green (BG), alizarin red S (ARS), indigo red (IDR)). Systematic exploring on the sensing mechanism reveals that fluorescence resonance energy transfer (FRET) for BG, MG and IDR and inner filter effect (IFE) for ARS contribute to the realization of the fluorescence quenching process. It exhibits excellent sensing performances with low limit of detection (LOD) of 32, 58, 77 and 133 nM for BG, IDR, MG and ARS, respectively. The as-constructed Eu@Zr-MOF-808 was demonstrated to be a highly sensitive probe for screening of MG in fish pond and IDR in printing wastewater with satisfying results. Moreover, a portable test reagent bottle has been developed for visual on-site screening of sample containing dyes with naked eyes under UV light. This is the first attempt to construct the Eu@Zr-MOF-808 probe for sensingmultiple dyes in real samples and demonstrates promising applications in water quality monitoring.
染料检测仍然是一项艰巨的任务，因为它们具有很高的毒性。在本工作中，通过后合成修饰（PSM）设计了 Eu 功能化 Zr-金属有机骨架（Eu@Zr-MOF-808）作为荧光探针，用于快速监测四种最常用的染料（孔雀石绿（MG）、亮绿（BG）、茜素红 S（ARS）、靛红红（IDR））。对传感机制的系统探索表明，BG、MG 和 IDR 的荧光共振能量转移（FRET）和 ARS 的内滤效应（IFE）有助于实现荧光猝灭过程。它表现出优异的传感性能，对 BG、IDR、MG 和 ARS 的检测限（LOD）分别低至 32、58、77 和 133 nM。所构建的 Eu@Zr-MOF-808 被证明是一种用于筛选鱼塘中 MG 和印刷废水中 IDR 的高灵敏度探针，结果令人满意。此外，还开发了一种便携式测试试剂瓶，可在紫外光下用肉眼对含染料的样品进行现场可视化筛选。这是首次尝试构建用于检测实际样品中多种染料的 Eu@Zr-MOF-808 探针，并在水质监测中具有广阔的应用前景。
