A dual-functional fluorescent nanoprobe based on UIO-66-NH2 for the continuous detection of o-phenylenediamine and Ag+†

IF 2.7 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY New Journal of Chemistry Pub Date : 2024-11-04 DOI:10.1039/D4NJ03591G

Yanmei Si, Yansong Li, Ranxu Zhou, Xin Zhang, Wei Liu, Duyuan Yue and Yehao Yan

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Abstract

Environmental pollution, especially caused by organic pollutants and heavy metal ions, seriously threaten the ecological environment and human health. In this work, UIO-66-NH₂, with fluorescence emission at 426 nm, was synthesized. It was found that with the increase in the concentration of o-phenylenediamine (OPD) in UIO-66-NH₂ solution, the fluorescence at 426 nm was enhanced, which could be used to quantify the OPD content. In addition, with the increased concentration of Ag⁺, fluorescence of the UIO-66-NH₂/OPD system decreased at 426 nm, while a new fluorescence peak appeared at 556 nm. Based on the changes in the fluorescence property of the UIO-66-NH₂/OPD system before and after the additon of Ag⁺, a quantitative analysis of Ag⁺ concentration (0.31–225 μM) by the ratio of F426/F556 was realized. This strategy used UIO-66-NH₂ as the probe to realize the continuous determination of organic pollutants and heavy metal ions, providing a new idea for the detection of pollutants.

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基于 UIO-66-NH2 的双功能荧光纳米探针，用于连续检测邻苯二胺和 Ag+†

环境污染，尤其是有机污染物和重金属离子的污染，严重威胁着生态环境和人类健康。本研究合成了荧光发射波长为 426 nm 的 UIO-66-NH2。研究发现，随着 UIO-66-NH2 溶液中邻苯二胺（OPD）浓度的增加，426 nm 处的荧光增强，可用于量化 OPD 的含量。此外，随着 Ag+ 浓度的增加，UIO-66-NH2/OPD 体系在 426 纳米波长处的荧光减弱，而在 556 纳米波长处出现了一个新的荧光峰。根据加入 Ag+ 前后 UIO-66-NH2/OPD 系统荧光性质的变化，通过 F426/F556 的比值实现了对 Ag+ 浓度（0.31-225 μM）的定量分析。该策略以 UIO-66-NH2 为探针，实现了有机污染物和重金属离子的连续测定，为污染物的检测提供了新思路。

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