Abstract：
An alarming increase in the use of pesticides and organoarsenic compounds and their toxic impacts on the environment have inspired us to develop a selective and highly sensitive sensor for the detection of these pollutants. Herein, a bio-friendly, low-cost Al-based luminescent metal-organic framework (1\')-based fluorescent material is demonstrated that helps in sustaining water quality by rapid monitoring and quantification of a long-established pesticide (pendimethalin) and a widely employed organoarsenic feed additive (roxarsone). A pyridine-functionalized porous aluminum-based metal-organic framework (Al-MOF) was solvothermally synthesized. After activation, it was used for fast (<10 s) and selective turn-off detection of roxarsone and pendimethalin over other competitive analytes. This is the first MOF-based recyclable sensor for pendimethalin with a remarkably low limit of detection (LOD, 14.4 nM). Real-time effectiveness in detection of pendimethalin in various vegetable and food extracts was successfully verified. Moreover, the aqueous-phase recyclable detection of roxarsone with an ultralow detection limit (13.1 nM) makes it a potential candidate for real-time application. The detection limits for roxarsone and pendimethalin are lower than the existing luminescent material based sensors. Furthermore, the detection of roxarsone in different environmental water and a wide pH range with a good recovery percentage was demonstrated. In addition, a cheap and bio-friendly 1\'@chitosan@paper strip composite was prepared and successfully employed for the hands-on detection of pendimethalin and roxarsone. The turn-off behavior of 1\' in the presence of pendimethalin and roxarsone was examined systematically, and plausible mechanistic pathways were proposed with the help of multiple experimental evidences.
摘要：
农药和有机砷化合物的使用及其对环境的毒性影响的惊人增长激发了我们开发一种选择性和高灵敏度的传感器来检测这些污染物。在这里，一个生物友好的，低成本铝基发光金属有机框架（1\'）基荧光材料被证明有助于通过快速监测和量化长期建立的农药（戊二氢萘）和广泛使用的有机砷饲料添加剂（roxarsone）来维持水质。溶剂热合成了吡啶官能化的多孔铝基金属有机骨架(Al-MOF)。激活后,与其他竞争性分析物相比，它用于快速（<10s）和选择性关闭检测罗沙松和二甲双胍。这是第一个基于MOF的可循环使用的传感器，该传感器具有极低的检测限（LOD，14.4nM)。已成功验证了检测各种蔬菜和食品提取物中二甲戊灵的实时有效性。此外，roxarsone的水相可回收检测具有超低的检测限（13.1nM），使其成为实时应用的潜在候选者。罗沙酮和二甲戊灵的检测限低于现有的基于发光材料的传感器。此外，证明了在不同环境水和宽pH范围内检测罗沙酮的回收率。此外,制备了一种廉价且生物友好的1\'@壳聚糖@纸带复合材料，并成功地将其用于对二甲萘林和罗沙松的动手检测。系统地检查了在存在二甲戊灵和罗沙松的情况下1\'的关闭行为，并在多个实验证据的帮助下提出了合理的机理途径。
