化学
亚硝酸盐
羟基自由基
水溶液
荧光
光解
光降解
分析物
选择性
检出限
紫外线
激光诱导荧光
光化学
硝酸盐
激进的
有机化学
催化作用
色谱法
光催化
量子力学
物理
作者
Kun Wang,Rui Wang,Yikun Fang,Caiyun Liu,Hanchuang Zhu,Xiaodi Rong,Baocun Zhu
出处
期刊:Talanta
[Elsevier]
日期:2024-04-01
卷期号:: 126118-126118
标识
DOI:10.1016/j.talanta.2024.126118
摘要
Nitrite (NO2-) has been widely recognized by the international community as an important substance affecting water quality safety and human health, and the detection of NO2- has always been a hot topic for researchers. Fluorescent probe method is an emerging and ideal way for detecting NO2-. Due to the high dependence of the reported reactive NO2- fluorescent probes on strong acidic systems, using the idea of photochemistry, a fluorescence analysis method for detecting NO2- was proposed in this work to change the necessity of strong acidic solutions in probe detection process. A 365 nm UV-LED lamp was used to irradiate NO2- in aqueous solution to convert it into hydroxyl radicals (HO·), and capture the photodegradation product of NO2- using coumarin-3-carboxylic acid as probe 3-CCA that can react with HO· to generate only one type of strong fluorescent substance. This probe has excellent photostability, selectivity, and anti-interference ability, and can realize the quantitative detection of NO2- (0-15 μM) in pure aqueous solution with pH of 7.4. In addition, its application in actual water samples is also satisfactory, with a recovery rate of (85.91%∼109.15%). Importantly, we hope that this photolysis strategy can open up the novel thinking to develop suitable fluorescent probes for the analysis and detection of some hardly detected analytes.
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