Carbon dots for ratiometric fluorescence detection of morin

The B,N dual-doped carbon dots (B,N-CDs) for ratiometric fluorescence detection the morin were pre -pared 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, respec-tively. 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 mu mol/L and 0.3 mu mol/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. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The B,N dual-doped carbon dots (B,N-CDs) were prepared using a single-step hydrothermal method for ratiometric fluorescence detection of morin, exhibiting optimal excitation and emission wavelengths. The fluorescence intensity of B,N-CDs showed a linear relationship with morin concentration and excellent selectivity. B,N-CDs were effective in detecting morin in urine samples with high recoveries.