Ionic liquid-sensitized molecularly imprinted polymers (MIPs) based on Mn and Cu co-doped ZnIn2S4 quantum dots functionalized graphene (QDs-G@ILMIPs) were prepared by a one-pot facile polymerization at room temperature. Here, the ionic liquid was used as functional monomers to provide chemical bonds for the recognition sites of target molecules. The ionic liquid was also used to improve the selectivity and adsorption capacity, and enhance the fluorescence stability and sensitivity of the MIPs for surface modification. Additionally, the Mn/Cu co-doped ZnIn2S4 quantum dots could play a synergistic role in avoiding the toxicity of the heavy metals, and enhance the fluorescence performance. An increased efficiency and sensitivity of QDs-G@ILMIPs was obtained owing to the use of graphene with its large specific surface area, which effectively increased the number of binding sites to facilitate the electron transfer process. The turn-off fluorescence spectra of QDs-G@ILMIPs decreased sharply with an increasing concentration of the λ-cyhalothrin standards within the range from 1 to 350 μg g-1. The detection limit of QDs-G@ILMIPs was 0.246 μg g-1. Furthermore, the QDs-G@ILMIPs toward λ-cyhalothrin detection in real samples, as well as its recovery, reproducibility and stability, proved that the QDs-G@ILMIPs could be extensively applied for the accurate detection of pesticide residues in food samples.

中文翻译：

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基于杂原子共掺杂量子点功能化石墨烯的离子液体敏化分子印迹聚合物用于敏感检测λ-三氯氟氰菊酯

基于Mn和Cu共掺杂ZnIn2S4量子点功能化石墨烯（QDs-G@ILMIPs）的离子液体敏化分子印迹聚合物（MIPs）是在室温下通过一锅法聚合制备的。在这里，离子液体被用作功能单体，为目标分子的识别位点提供化学键。离子液体还用于提高选择性和吸附能力，增强 MIPs 的荧光稳定性和灵敏度，用于表面改性。此外，Mn/Cu共掺杂的ZnIn2S4量子点可以在避免重金属毒性和增强荧光性能方面发挥协同作用。由于使用比表面积大的石墨烯，QDs-G@ILMIPs 的效率和灵敏度得到了提高，这有效地增加了结合位点的数量，以促进电子转移过程。QDs-G@ILMIPs 的关闭荧光光谱随着 λ-三氯氟氰菊酯标准品浓度在 1 到 350 μg g-1 范围内的增加而急剧下降。QDs-G@ILMIPs 的检测限为 0.246 μg g-1。此外，QDs-G@ILMIPs对实际样品中λ-三氯氟氰菊酯的检测及其回收率、重现性和稳定性证明了QDs-G@ILMIPs可广泛应用于食品样品中农药残留的准确检测。QDs-G@ILMIPs 的检测限为 0.246 μg g-1。此外，QDs-G@ILMIPs对实际样品中λ-三氯氟氰菊酯的检测及其回收率、重现性和稳定性证明了QDs-G@ILMIPs可广泛应用于食品样品中农药残留的准确检测。QDs-G@ILMIPs 的检测限为 0.246 μg g-1。此外，QDs-G@ILMIPs对实际样品中λ-三氯氟氰菊酯的检测及其回收率、重现性和稳定性证明了QDs-G@ILMIPs可广泛应用于食品样品中农药残留的准确检测。