Molecular insights into the sensitivity detection mechanism of fluorescent 2D Zr-BTB for 2,4-dinitrophenol,Journal of Materials Chemistry C

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Molecular insights into the sensitivity detection mechanism of fluorescent 2D Zr-BTB for 2,4-dinitrophenol
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-07-12 , DOI: 10.1039/d3tc01325a
Deyi Zhan _{1,

2} , Zhiwu Yu ₃ , Abdul Saeed _{1,

2} , Qi Hu _{1,

2} , Nanjing Zhao ₄ , Weihong Xu _{1,

2} , Junfeng Wang ₃ , Lingtao Kong ₁ , Jinhuai Liu ₁

Affiliation

Detection of nitroaromatic compounds (NACs) has been investigated previously using fluorescent metal–organic frameworks (MOFs). However, the vagueness of the sensing mechanism has hindered the development of efficient sensors. Here we have explored a two-dimensional (2D) MOF, Zr-BTB nanosheets, as a rapid (as short as 10 s), sensitive, and selective sensor for detecting low-concentrations of 2,4-dinitrophenol (2,4-DNP); its limit of detection for 2,4-DNP was quantified to be as low as 0.013 μM (2.40 ppb). The molecular sensing mechanism and the specific interaction sites were investigated using FTIR, UV-vis absorption, XPS, and 2D ssNMR spectroscopy along with density functional theory (DFT) calculations. This work presents insight into florescence-quenching mechanisms for the sensitive sensing of NACs at the molecular level, which may provide valuable ideas for designing novel MOF sensors for NAC detection.

中文翻译：

荧光二维 Zr-BTB 对 2,4-二硝基苯酚灵敏度检测机制的分子见解

先前已使用荧光金属有机框架（MOF）研究了硝基芳香族化合物（NAC）的检测。然而，传感机制的模糊性阻碍了高效传感器的发展。在这里，我们探索了一种二维（2D）MOF、Zr-BTB纳米片，作为一种快速（短至10秒）、灵敏和选择性的传感器，用于检测低浓度的2,4-二硝基苯酚（2,4-DNP）；其对 2,4-DNP 的检测限经量化低至 0.013 μM (2.40 ppb)。使用 FTIR、UV-vis 吸收、XPS 和 2D ssNMR 光谱以及密度泛函理论 (DFT) 计算研究了分子传感机制和特定相互作用位点。这项工作深入了解了 NAC 在分子水平上敏感传感的花色猝灭机制，

更新日期：2023-07-12

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