Microchimica Acta ( IF 5.3 ) Pub Date : 2021-09-08 , DOI: 10.1007/s00604-021-04990-z Xiao Gao 1 , Hao Zhang 1 , Yao Shen 1 , Yining Li 1 , Keren Xiao 1 , Huimin Xu 1 , Li Zhang 2 , Zhiyi Yao 1
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A water-soluble perylene imide derivative (PDI-Glu) was synthesized and their supramolecular aggregates composed of PDI-Glu and Al3+ were prepared as a “turn on” fluorometric probe to monitor F− in a purely aqueous system. Based on an “indicator displacement assay” (IDA) approach, the sensing performance and mechanism of PDI-Glu/Al3+ complex toward F− were investigated by absorption and emission spectra. It was suggested that disassembly of PDI-Glu/Al3+ aggregates was promoted by addition of F− through the competitive binding between Al3+ and F−. The detection limit is 240 nmol/L. This method featured simple preparation, excellent water solubility, adjustable self-assembly performance, ease of observation and operation, and high selectivity and sensitivity. It was used for monitoring F− in toothpaste and tap water samples with excellent accuracy and recovery. To the best of our knowledge, this is the first water-soluble perylene diimide-based probe for F− detection in 100% aqueous media. We believe this work could not only extend the sensing scope of water-soluble perylene diimide, but also bring some useful information for the rapid detection of anionic analytes in aqueous media.
Graphical abstract
中文翻译：
基于 100% 水介质中苝二亚胺超分子聚集体的氟化物视觉检测
合成了水溶性苝酰亚胺衍生物 (PDI-Glu)，并制备了由 PDI-Glu 和 Al 3+组成的超分子聚集体作为“开启”荧光探针以监测纯水系统中的 F -。基于“指示物置换分析”（IDA）方法，通过吸收和发射光谱研究了PDI-Glu/Al 3+配合物对F -的传感性能和机理。有人提出，通过 Al 3+和 F -之间的竞争性结合，添加 F -促进了 PDI-Glu/Al 3+聚集体的分解。. 检测限为 240 nmol/L。该方法制备简单、水溶性好、自组装性能可调、易于观察和操作、选择性和灵敏度高。它用于监测牙膏和自来水样品中的F -具有出色的准确度和回收率。据我们所知，这是第一个在 100% 水性介质中用于 F -检测的水溶性苝二酰亚胺探针。我们相信这项工作不仅可以扩展水溶性苝二亚胺的传感范围，而且可以为水介质中阴离子分析物的快速检测带来一些有用的信息。
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