A dual-channel probe based on copper ion-mediated metal organic framework composite for colorimetric and ratiometric fluorescence monitoring ofglyphosate degradation in soil and water.
A dual-channel probe based on copper ion-mediated metal organic framework composite for colorimetric and ratiometric fluorescence monitoring ofglyphosate degradation in soil and water.
复制标题
一种基于铜离子介导的金属有机骨架复合材料的双通道探针，用于土壤和水中草甘膦降解的比色和比率荧光监测。
DOI：
10.1007/s00604-022-05473-5
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Xiaoqing Chen
中科院分区：
文献类型：
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作者：
Yuni Yuan;Wei liu;Qi Liu;Qing He;Yuyang Hu;Xinyu Jiang;Xiaoqing Chen
研制了一种基于新型复合金属有机骨架(ZnMOF-74@Al-MOF)的双通道探针，通过比率荧光和比色法测定草甘膦。所制备的探针不仅可以通过在MOF中引入铜离子来识别和结合草甘膦，而且具有类似过氧化物酶的催化活性。草甘膦对目标分子的识别引起了其荧光强度和紫外吸收强度随浓度的变化。并且，高比表面积和孔隙率的卟啉MOF为所开发的探针提供了更多的响应机会，从而为草甘膦提供了更好的检测性能。在最佳条件下，铜离子介导的方法对草甘膦具有良好的检测性能，检出限较低(荧光法和比色法的检出限分别为0.070和0.092μg mL-1)。此外，还对该探针的荧光猝灭和类过氧化物酶催化作用的可能机制进行了探讨。该双通道方法用于环境样品中草甘膦的降解监测，获得了满意的结果。
A dual-channel probe was developed, based on a novel composite metal organic frameworks (ZnMOF-74@Al-MOF) for glyphosate determination through ratio fluorescence and colorimetric methods. The prepared probe can not only recognize and combine glyphosate by introducing copper ion into the MOF, but also possess peroxidase-like catalytic activity. The recognition of target glyphosate brought about changes relative to its concentration on fluorescence intensity and ultraviolet absorption. And, the high specific surface area and porosity of porphyrin MOF provides the developed probe with more response opportunities to afford a better detection performance for glyphosate. Under optimum conditions, the copper ion-mediated method exhibited good detection performance for glyphosate with low detection limits (0.070 and 0.092 μg mL-1 for fluorescence and colorimetric techniques, respectively). Furthermore, the possible mechanisms of the fluorescence quenching and the peroxidase-like catalytic of the probe were also explored. This dual-channel method was applied to monitor glyphosate degradation in environmental samples and satisfactory results were obtained.