Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
Hubei Province Key Laboratory of Regional Development and Environment Response, Wuhan, 430062, China.
Mikrochim Acta. 2021 Feb 25;188(3):101. doi: 10.1007/s00604-021-04756-7.
Green emitting copper nanoclusters (G-Cu NCs), yellow emitting Cu NCs (Y-Cu NCs), orange emitting Cu NCs (O-Cu NCs) and red emitting Cu NCs (R-Cu NCs) were prepared using chicken egg white as the stabilizer by changing the reaction conditions. This is a green, facile and cheap method to explore different color emitting CuNCs by the same precursor and stabilizers. The G-Cu NCs were employed for the detection of ethanol due to their aggregation induced emission enhancement (AIEE) effect. The fluorescence emission of Cu NCs at 526 nm under the excitation of 444 nm can be effectively enhanced in the presence of ethanol due to AIEE effect, thus realizing the quantitative determination of ethanol content in the range 5-60%. In addition, a visual dual-emission fluorescence probe with the combination of G-Cu NCs and silicon nanoparticles (Si NPs/G-Cu NCs) was designed to evaluate ethanol content conveniently and rapidly. Desirable linear relationship is observed between ratio of fluorescence intensity (I/I) and ethanol content under the excitation of 383 nm. Visible color transformation of this probe is observed in the ethanol content range 2-20%. Moreover, the ethanol sensing platforms were applied to the detection and evaluation of the alcohol content of liquor, and the recoveries in liquor were in the range 99.7% to 113%, broadening the applications of Cu NCs and providing a sensitive detection method for ethanol.
绿色发射铜纳米团簇（G-Cu NCs）、黄色发射铜纳米团簇（Y-Cu NCs）、橙色发射铜纳米团簇（O-Cu NCs）和红色发射铜纳米团簇（R-Cu NCs）通过改变反应条件，使用鸡蛋白作为稳定剂制备。这是一种绿色、简便且廉价的方法，可使用相同的前体和稳定剂探索不同颜色发射的 CuNCs。由于聚集诱导发射增强（AIEE）效应，G-Cu NCs 被用于检测乙醇。由于 AIEE 效应，在 444nm 激发下，Cu NCs 在 526nm 处的荧光发射可以有效地增强，从而实现了乙醇含量在 5-60%范围内的定量测定。此外，设计了一种将 G-Cu NCs 和硅纳米颗粒（Si NPs/G-Cu NCs）结合的双发射荧光探针，用于方便、快速地评估乙醇含量。在 383nm 激发下，观察到荧光强度比（I/I）与乙醇含量之间存在良好的线性关系。在 2-20%的乙醇含量范围内，该探针的可见颜色发生转变。此外，该乙醇传感平台用于检测和评估酒中酒精含量，在酒中的回收率在 99.7%至 113%之间，拓宽了 Cu NCs 的应用范围，并为乙醇提供了一种灵敏的检测方法。
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