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Lignin-derived red-emitting carbon dots for colorimetric and sensitive fluorometric detection of water in organic solvents.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0ay00485e Jun Wang 1 , Jianying Wang 1 , Wenxin Xiao 1 , Zhen Geng 2 , Di Tan 3 , Lai Wei 1 , Jinhua Li 1 , Longjian Xue 3 , Xianbao Wang 1 , Jintao Zhu 2
Analytical Methods ( IF 2.7 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0ay00485e Jun Wang 1 , Jianying Wang 1 , Wenxin Xiao 1 , Zhen Geng 2 , Di Tan 3 , Lai Wei 1 , Jinhua Li 1 , Longjian Xue 3 , Xianbao Wang 1 , Jintao Zhu 2
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Water contained in organic solvents or products in chemical industries, as contaminants, poses an adverse risk in chemical reaction, life or environmental safety. However, conventional fluorescent water sensing suffers from drawbacks, including limited organic solvents, narrow linear range, lack of visual detection, single detection strategy, and others. Herein, a novel type of red-emitting carbon dots (RCDs) has been created via one-step solvothermal synthesis based on biomass (e.g., lignin) as the carbon source and p-phenylenediamine (PPD) as the nitrogen source. Colorimetric and fluorometric detection of water in organic solvents has been demonstrated. The RCDs showed excitation-independent photoluminescence (PL) in different solvents and solvatochromic behavior, red in water, orange in ethanol, yellow in N,N-dimethyl formamide (DMF), and green in acetone. Remarkably, detection of water content in six organic solvents, including polar solvents (ethanol, acetone, dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), and DMF) and apolar solvent (ether), was performed. With increasing water content in solvents, emission colors changed from green to red, or yellow to red, offering qualitative sensing of water. Furthermore, a broad linear detection range (10–90%), low limits of detection (LOD) (e.g., 0.36% for ethanol and 0.082% for acetone), and good generality for various organic solvent systems were realized. Particularly, dual sensing strategies, including PL quenching and shift with water in various solvents, were achieved simultaneously, showing great potential for the development of advanced optical sensors with high performance.
中文翻译：
木质素衍生的红色发光碳点，用于比色和灵敏的荧光检测有机溶剂中的水。
化学工业中有机溶剂或产品中所含的水作为污染物，会对化学反应，生命或环境安全造成不利影响。然而，常规的荧光水感测具有缺点，包括有机溶剂有限，线性范围窄，缺乏视觉检测，单一检测策略等。在此，一种新型的发红光的碳点（RCD的）已经创建经由基于生物质的一步溶剂热合成（例如，木质素）作为碳源和p-苯二胺（PPD）作为氮源。已经证明了比色法和荧光法检测有机溶剂中的水。RCD在不同溶剂和溶剂变色行为中显示不依赖激发的光致发光（PL），红色在水中，橙色在乙醇中，黄色在N，N-二甲基甲酰胺（DMF）中，绿色在丙酮中。显着地，对包括极性溶剂（乙醇，丙酮，二甲基亚砜（DMSO），四氢呋喃（THF）和DMF）和非极性溶剂（醚）在内的六种有机溶剂中的水含量进行了检测。随着溶剂中水含量的增加，发射色从绿色变为红色，或从黄色变为红色，从而提供了对水的定性检测。此外，线性检测范围广（10–90％），检测限低（LOD）（例如，乙醇为0.36％，丙酮为0.082％），并且实现了对各种有机溶剂体系的良好通用性。特别是，同时实现了双重传感策略，包括PL猝灭和在各种溶剂中用水的转移，显示出开发具有高性能的先进光学传感器的巨大潜力。
更新日期：2020-07-02
中文翻译：
木质素衍生的红色发光碳点，用于比色和灵敏的荧光检测有机溶剂中的水。
化学工业中有机溶剂或产品中所含的水作为污染物，会对化学反应，生命或环境安全造成不利影响。然而，常规的荧光水感测具有缺点，包括有机溶剂有限，线性范围窄，缺乏视觉检测，单一检测策略等。在此，一种新型的发红光的碳点（RCD的）已经创建经由基于生物质的一步溶剂热合成（例如，木质素）作为碳源和p-苯二胺（PPD）作为氮源。已经证明了比色法和荧光法检测有机溶剂中的水。RCD在不同溶剂和溶剂变色行为中显示不依赖激发的光致发光（PL），红色在水中，橙色在乙醇中，黄色在N，N-二甲基甲酰胺（DMF）中，绿色在丙酮中。显着地，对包括极性溶剂（乙醇，丙酮，二甲基亚砜（DMSO），四氢呋喃（THF）和DMF）和非极性溶剂（醚）在内的六种有机溶剂中的水含量进行了检测。随着溶剂中水含量的增加，发射色从绿色变为红色，或从黄色变为红色，从而提供了对水的定性检测。此外，线性检测范围广（10–90％），检测限低（LOD）（例如，乙醇为0.36％，丙酮为0.082％），并且实现了对各种有机溶剂体系的良好通用性。特别是，同时实现了双重传感策略，包括PL猝灭和在各种溶剂中用水的转移，显示出开发具有高性能的先进光学传感器的巨大潜力。
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