The B,N dual-doped carbon dots (B,N-CDs) for ratiometric fluorescence detection the morin were prepared from sodium tetraborate and polyethyleneimine through the single-step hydrothermal method. The B,N-CDs exhibited the optimum excitation and emission wavelength at 340 nm and 467 nm, respectively. Interestingly, the intensities of emission peak at 467 nm of B,N-CDs reduced meanwhile a new peak emerged at 560 nm with the continuous addition of morin, which revealed the ratio fluorescence characteristic between F_560nm/F_467nm and morin concentration with the linearity range and detection limit of 14.5–32.5 μmol/L and 0.3 μmol/L (S/N = 3), respectively. The interference of common antibiotics and remedies could be ignored when the concentration of morin was detected by the B,N-CDs, which demonstrating the outstanding selectivity. Furthermore, the proposed fluorescence method is used to detect morin in urine with recoveries are 99.8–104.5%. The results of this research indicate the feasibility and practicality of B,N-CDs as an effective fluorescent probe for the determination of morin.

通过单步水热法，由四硼酸钠和聚乙烯亚胺制备用于比例荧光检测莫林的B，N双掺杂碳点（B，N-CD）。B，N-CD分别在340 nm和467 nm处表现出最佳的激发和发射波长。有趣的是，B，N-CDs在467 nm处的发射峰强度降低，而在不断添加_{morin的情况下}在560 nm处出现了一个新的峰，这揭示了F _560nm / F _467nm之间的比率荧光特性线性范围和检出限分别为14.3–32.5μmol/ L和0.3μmol/ L（S / N = 3）。当B，N-CDs检测到香豆素浓度时，可以忽略普通抗生素和药物的干扰，这表明了其出色的选择性。此外，所提出的荧光方法可用于检测尿液中的动蛋白，回收率为99.8–104.5％。这项研究的结果表明，B，N-CDs作为一种有效的荧光探针用于测定香豆素的可行性和实用性。