4-Carboxyphenylboronic acid was used as the single precursor to facilely prepare fluorescent carbon quantum dots by one-step solvothermal method. The as-obtained carbon dots (CDs) exhibited highly selective and sensitive for benzo[a]pyrene (BaP), and may be a splendid sensor for sensing BaP. The principle was that the as-prepared CDs could form a complex with BaP through hydrophobic interaction which causes the decrease of fluorescence intensity of CDs by static quenching principle. The constructed fluorescent sensor exhibited excellent linearity ranged from 0.002 to 0.06 μg mL⁻¹ and provided a low limit of detection of 0.16 ng mL⁻¹. The experimental results showed that this fluorescent sensor resulted in simplicity, rapidness, low cost, short analytical time, and high sensitivity and stability. Validation with real water samples endowed the sensor high reliability and feasibility for BaP determination in practical application in various samples.

以4-羧基苯基硼酸为单一前驱体，通过一步溶剂热法制备荧光碳量子点。所获得的碳点 (CD) 对苯并 [a] 芘 (BaP) 表现出高度选择性和敏感性，可能是一种出色的 BaP 传感器。其原理是制备的CDs可以通过疏水相互作用与BaP形成复合物，通过静态猝灭原理导致CDs的荧光强度降低。构建的荧光传感器在 0.002 至 0.06 μg mL ^-1范围内表现出优异的线性，并提供了 0.16 ng mL ^-1的检测下限. 实验结果表明，这种荧光传感器简单、快速、成本低、分析时间短、灵敏度和稳定性高。对真实水样的验证赋予了传感器在各种样品的实际应用中进行 BaP 测定的高可靠性和可行性。