Reduction reactions at metal/non-aqueous interfaces can be sensed with the turn-on fluorophore resazurin
Reduction reactions at metal/non-aqueous interfaces can be sensed with the turn-on fluorophore resazurin
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金属/非水界面处的还原反应可以通过开启荧光团刃天青来感测
DOI：
10.1039/d2qm01309f
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发表时间：
2023
影响因子：
7
通讯作者：
Kisley, Lydia
中科院分区：
文献类型：
--
作者：
Gatland, Zachary;Madrid, Daniel;Siegel, Mark;Kisley, Lydia
界面氧化还原反应在腐蚀和催化方面具有重要的应用，但传统的电化学电池方法不能用于研究非导电环境如非水溶剂中的这些反应。我们证明了可以被还原为高荧光试卤灵的分子刃天青在非水溶剂中的传感是相容的。我们表征了染料在乙醇、二甲基甲酰胺（DMF）、丙酮和二甲基亚砜（DMSO）中的光谱特性，显示在所有四种溶剂中，与刃天青相比，“开启”试卤灵的强度增加了10倍。然后，我们将刃天青应用于感测铁表面的腐蚀性还原反应。在乙醇，丙酮和DMSO中观察到由于刃天青还原为试卤灵而导致的荧光强度增加，而DMF没有打开。我们的工作表明，荧光染料具有相当大的潜力可用于了解非水溶剂中的氧化还原反应，但必须注意了解染料，溶剂和反应之间的相互作用。
Interfacial oxidation–reduction reactions have important applications in corrosion and catalysis, but traditional electrochemical cell methods cannot be used to study these reactions in non-conducting environments such as non-aqueous solvents. We demonstrate that the molecule resazurin that can be reduced to highly-fluorescent resorufin is compatible for sensing in non-aqueous solvents. We characterize the spectral properties of the dyes in ethanol, dimethylformamide (DMF), acetone, and dimethyl sulfoxide (DMSO), showing a ∼10× increase in intensity for “turned-on” resorufin compared to resazurin in all four solvents. We then apply resazurin to sense corrosive reduction reactions at iron surfaces. Increases in fluorescence intensity due to resazurin reduction to resorufin are observed in ethanol, acetone, and DMSO, while DMF had no turn-on. Our work shows that fluorescent dyes have considerable potential to be used to understand redox reactions in non-aqueous solvents, but care must be taken to understand the interplay between the dye, the solvent, and the reactions occurring.