Nitrogen-doped carbon dots for dual-wavelength excitation fluorimetric assay for ratiometric determination of phosalone

A selective dual quenching sensor (EY/BG@CDs) for simultaneous monitoring of gentamicin and ketorolac levels in plasma: a highly efficient platform that caters to the needs of therapeutic drug monitoring

“… 52 The absorption bands at 1725 cm −1 and 1613 cm −1 corresponded to the stretching vibration of the C O/C N and bending vibration of NH/OH, respectively. 53 A peak at 1404 cm −1 corresponds to C–NH–C groups, and peaks at 1215 cm −1 , 1075 cm −1 and 1005 cm −1 were assigned to vibration bands of C–C, C–N, C–O, respectively. 54 Finally, the band observed at 795 cm −1 corresponded to the N–H bending (out-of-plane) vibrations.…”

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

“…When the phosalone was introduced, the quenching of N-CDs was achieved at 235 nm within just 1 min, whereas the excitation peak at 327 nm displayed a negligible change. Correspondingly, the fluorescence intensity of N-CDs-phosalone complex was quenched at 254 nm, but it could not quench the fluorescence intensity of CDs at 365 nm [261]. Under controlled parameters, this N-CDs-based fluorescence sensing system could display a linearity for two different concentration ranges of phosalone, i.e., from 0.08 to 4 µg mL −1 , and from 4 to 14 µg mL −1 .…”

“…Under controlled parameters, this N-CDs-based fluorescence sensing system could display a linearity for two different concentration ranges of phosalone, i.e., from 0.08 to 4 µg mL −1 , and from 4 to 14 µg mL −1 . Moreover, this sensor could demonstrate the phosalone detection with an estimated LOD value of 28.5 µg mL −1 [261].…”

“…Liao and co-workers carried out hydrothermal synthesis of N-CDs from urea and cellobiose for the construction of a label-free ratiometric fluorescence sensor to determine phosalone, an organophosphorus pesticide [261]. Only one emission peak at 420 nm resulted upon excitation at wavelengths of 327 or 235 nm.…”

An insight into the role of carbon dots in the agriculture system: a review

“…Additionally, they further evaluated the accuracy of the sensor compared to gas chromatography (GC) having a very similar sensing performance. 246 Similarly, Song et al developed a N-CD-based fluorescent assay for the ratiometric estimation of pirimicarb in real samples such as tea, apple, and cucumber. The authors found that the prepared N-CDs exhibit two emissive peaks at 400 and 582 nm, in which the emission peak at 400 nm was enhanced while that at 582 nm exhibited no changes after the addition of pirimicarb.…”