Convenient and sensitive detection of norfloxacin with fluorescent carbon dots

Abstract

Carbon dots (CDs) were synthesized by refluxing glucose, as efficient fluorescence probes, which show convenient and sensitive detection of norfloxacin (NOR) over a wide concentration range. It is worth noting that because of the hydrogen bond interactions between the CDs and NOR, the fluorescence intensity of CDs was remarkably enhanced in the presence of NOR, which indicates that CDs are capable of rapid, stable and sensitive determination of NOR. Compared with high-performance liquid chromatography, the fluorescence enhancement method is considerably simpler and faster, and will pave a new way for the determination of NOR.

Selective and sensitive chemosensor for lead ions using fluorescent carbon dots prepared from chocolate by one-step hydrothermal method

“…Meanwhile, it can be clearly seen that the maximum emission intensity was centered at 354 nm with an excitation wavelength of 280 nm. Moreover, the synthesized CDs exhibited excitationdependent fluorescence behavior which was similar as previous reports on CDs [40,41]. As shown in Fig.…”

Design of the phthalonitrile‐based composite laminates by improving the interfacial compatibility and their enhanced properties

“…Additionally, in comparison with that of the ternary systems, CPEN/BA‐ph/CE prepolymer shows larger viscosity after 2500 s at 200 °C than that of BA‐ph/CE/CPEN, indicating that the methods of introducing CPEN also affect the curing behaviors. This can be explained by the fact that for CPEN/BA‐ph/CE prepolymer, CPEN was mixed with BA‐ph/CE for 3 h, the molecular chains of CPEN can disperse homogeneously in the BA‐ph/CE; more importantly, the nitrile groups in molecular chains of CPEN when mixed with BA‐ph/CE for 3 h, would obtain more opportunities to interact with BA‐ph/CE to form the network, thereby, showing a little larger viscosity.…”

“…confirmed that the introduction of PEN containing hydroxyl groups into the phthlonitrile matrix can improve the interface between GF and polymer matrix. However, in the previous work, PEN resins are very difficult to form crosslink network without the catalysts because of steric hindrance of the pendant nitriles groups on the polymer chains and the high curing temperature (>300 °C) have enormously limited the application of the reinforced composites …”

Amine-rich carbon nanodots as a fluorescence probe for methamphetamine precursors

“…In recent years, doped carbon nanodots synthesized by bottom up methods have been researched extensively due to the simplicity in preparation 16 and significant improvement in optical performance including quantum yield and optical tunability 17,18 . As a consequence of doped CDs' versatility, they have been studied for wide range of applications including biological imaging [19][20][21][22] , light harvesting 23 39 have been successfully demonstrated.…”