Through facile and straightforward hydrothermal treatment of quercetin, green-emitting carbon dots (g-CDs) were synthesized. The as-prepared g-CDs exhibited good water solubility and stability. Moreover, the strong fluorescence of obtained g-CDs at 535 nm could be quenched by dopamine (DA), which was proven to be effective in detecting DA ranging from 2.0 to 40.0 μM with a low limit of detection (LOD) of 0.52 μM. Additionally, the g-CDs further showed its feasibility for DA determination in human serum with satisfactory recoveries (95.58%–106.87%), indicating that the g-CDs can be used as a promising tool for the detection of DA in human serum.

通过对槲皮素进行简单直接的水热处理，合成了发绿光的碳点 (g-CD)。所制备的 g-CDs 表现出良好的水溶性和稳定性。此外，获得的 g-CD 在 535 nm 处的强荧光可以被多巴胺 (DA) 淬灭，这被证明可有效检测 2.0 至 40.0 μM 的 DA，检测下限 (LOD) 为 0.52 μM。此外，g-CDs 进一步显示了其在人血清中测定 DA 的可行性，回收率令人满意（95.58%–106.87%），表明 g-CDs 可作为检测人血清中 DA 的有前途的工具。