School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, People's Republic of China; Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China.
School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 5;302:123070. doi: 10.1016/j.saa.2023.123070. Epub 2023 Jun 23.
An ultrasimple "turn-on" sensor for indirectly detecting ascorbic acid (AA) was prepared using N-acetyl-L-cysteine stabilized copper nanoclusters (NAC-CuNCs) via the AIE (aggregation-induced emission) effect controlled by Ce/Ce redox reaction. This sensor fully utilizes the different properties of Ce and Ce. Non-emissive NAC-CuNCs were synthesized by a facile reduction method. NAC-CuNCs easily aggregate in the presence of Ce due to AIE, resulting in fluorescence enhancement. However, this phenomenon cannot be observed in the presence of Ce. Ce possesses strong oxidizing ability and produces Ce by reacting with AA via a redox reaction, followed by switching on the luminescence of NAC-CuNCs. Moreover, the fluorescence intensity (FI) of NAC-CuNCs increases with the concentration of AA in the range of 4-60 µM, with the limit of detection (LOD) as low as 0.26 µM. This probe with excellent sensitivity and selectivity was successfully used in the determination of AA in soft drinks.
一种超简单的“开启”型传感器，用于间接检测抗坏血酸（AA），是通过 Ce/Ce 氧化还原反应控制的聚集诱导发射（AIE）效应，使用 N-乙酰-L-半胱氨酸稳定的铜纳米簇（NAC-CuNCs）制备的。该传感器充分利用了 Ce 和 Ce 的不同性质。NAC-CuNCs 通过简便的还原法合成，由于 AIE，在存在 Ce 的情况下，NAC-CuNCs 容易聚集，从而导致荧光增强。然而，在存在 Ce 的情况下，这种现象无法观察到。Ce 具有很强的氧化能力，并通过氧化还原反应与 AA 反应生成 Ce，从而开启 NAC-CuNCs 的发光。此外，NAC-CuNCs 的荧光强度（FI）随着 AA 浓度在 4-60 μM 范围内的增加而增加，检测限（LOD）低至 0.26 μM。该探针具有出色的灵敏度和选择性，成功用于软饮料中 AA 的测定。
