基于聚集诱导发光体的分子印迹比率荧光传感器用于食品样品中罗丹明 6G 的检测。
Aggregation-induced emission luminogen based molecularly imprinted ratiometric fluorescence sensor for the detection of Rhodamine 6G in food samples.
机构信息
Henan Key Laboratory of Cereal Resource Transformation and Utilization, College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Henan 450001, PR China.
College of Chemistry and Molecular Engineering, Zhengzhou University, Henan 450001, PR China.
出版信息
Food Chem. 2019 Jul 30;287:55-60. doi: 10.1016/j.foodchem.2019.02.081. Epub 2019 Feb 23.
Using an aggregation-induced emission luminogen (AIEgen) as the fluorescence signal part, a novel molecularly imprinted polymers (MIPs) based ratiometric fluorescence sensor (AIE-MIPs-1) was developed for detecting Rhodamine 6G (Rh6G) in food samples including dried papaya and beverage. The sensor exhibited strong blue fluorescence itself at 420 nm. Upon the adsorption of Rh6G, the original fluorescence intensity decreased while a new fluorescence emission peak at 562 nm increased gradually, which showed typical ratiometric fluorescence change. Good linear relationship between the fluorescence intensity ratio (I/I) and the concentration of Rh6G was obtained in the range of 0.0-10.0 μmol/L. A detection limit of 0.26 μmol/L Rh6G was achieved. Moreover, AIE-MIPs-1 exhibited good sensitivity towards Rh6G over other colorants. This study provided a new strategy for construction of MIPs-based fluorescence sensors by introducing AIEgens as the fluorescence signal part, which will significantly expand the categories and application ranges of MIPs-based fluorescence sensors.
采用聚集诱导发光体（AIEgen）作为荧光信号部分，开发了一种新型的分子印迹聚合物（MIPs）比率荧光传感器（AIE-MIPs-1），用于检测食品样品中的罗丹明 6G（Rh6G），包括木瓜干和饮料。该传感器本身在 420nm 处显示出强烈的蓝色荧光。在 Rh6G 的吸附作用下，原始荧光强度降低，而在 562nm 处逐渐增加新的荧光发射峰，呈现出典型的比率荧光变化。在 0.0-10.0μmol/L 的范围内，荧光强度比（I/I）与 Rh6G 浓度之间呈现出良好的线性关系。Rh6G 的检测限达到 0.26μmol/L。此外，AIE-MIPs-1 对 Rh6G 的灵敏度高于其他着色剂。本研究通过引入 AIEgens 作为荧光信号部分，为构建基于 MIPs 的荧光传感器提供了一种新策略，这将显著扩大基于 MIPs 的荧光传感器的种类和应用范围。
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