4.7 Article

An enhanced-stability metal-organic framework of NH2-MIL-101 as an improved fluorescent and colorimetric sensor for nitrite detection based on diazotization reaction

期刊

SENSORS AND ACTUATORS B-CHEMICAL
卷 386, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2023.133768

关键词

Nitrite; Metal-organic frameworks; Diazotization reaction; Dual -signal; Fluorescence; Colorimetry

向作者/读者索取更多资源

A specific nanoprobe was developed by functionalizing the luminescent MOF of NH2-MIL-101 with PVDF/PVP for detecting nitrite based on the diazotization reaction. The probe exhibited enhanced stability and higher fluorescence intensity, and the reaction of nitrite with the probe resulted in a significant fluorescence signal. With the addition of N-(1-Naphthyl) ethylenediamine, the color of the diazonium salt changed from colorless to purple-red. The sensor showed high sensitivity, selectivity, and good linearity, with a detection limit of 0.67 μM.
Nitrite ion (NO2- ) is a typical contaminant that can cause severe damage to the human body. Diazotization-based fluorimetric methods used for the efficient and selective detection of NO2- under a strong acidic condition remain a huge challenge. In this study, a specific nanoprobe was developed through the functionalization of the luminescent MOF of NH2-MIL-101 with Polyvinylidene fluoride/polyvinylpyrrolidone (PVDF/PVP) for detecting NO2based on diazotization reaction. After functionalization, the resultant NH2-MIL-101 @PVDF/PVP exhibited enhanced stability even under a strong acidic condition and featured higher fluorescence intensity. Because NO2reacted with the -NH2 group of the probe to form diazonium salt, a significant fluorescence signal was obtained. With the addition of N-(1-Naphthyl) ethylenediamine, the diazonium salt significantly changed from colorless to a purple-red color under direct sunlight. The developed dual-signal readout sensor exhibited high sensitivity, high selectivity, and good linearity in the range of 0.67-20 mu M with a limit of detection of 0.67 mu M. Owing to the unique properties of MOFs, the proposed sensor was characterized by simple preparation, high sensitivity, and fast response kinetics compared with the traditional sensing reagents. This study provides a potential strategy for fabricating smart fluorimetric probes used for nitrite detection.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据