A turn-on fluorescent sensor based on carbon dots from Sophora japonica leaves for the detection of glyphosate

Abstract

A green synthesis carbon dots (CDs) with low cost and low toxicity was applied to establish fluorescent nanoprobe for measurement of glyphosate. The synthesis was realized by one-pot hydrothermal procedure...

Green Synthesized Fluorescent Carbon Dots from Momordica charantia for Selective and Sensitive Detection of Pd2+ and Fe3+

“…[27] The O1s spectrum ( Figure 2d) showed three peaks at 530.6, 531.5 and 532.3 eV which proved the existence of OÀ H, C=O and CÀ OH. [28][29][30] The results confirmed the presence of oxygen-and nitrogen-containing groups on the surface of CDs.…”

“…Two peaks in the N1s spectrum (Figure 2c) could be attributed to C−N−C (399.3 eV) and N−H (400.1 eV) [27] . The O1s spectrum (Figure 2d) showed three peaks at 530.6, 531.5 and 532.3 eV which proved the existence of O−H, C=O and C−OH [28–30] . The results confirmed the presence of oxygen‐and nitrogen‐containing groups on the surface of CDs.…”

Gastroprotective effects of Nelumbinis Rhizomatis Nodus carbonisata-derived carbon dots on ethanol-induced gastric ulcers in rats

“…The spectral properties of NRNC-CDs were shown in Fig.2A. The UV-Vis absorption band was observed at 270 nm, which was contributed to the π−π * transition of C=C on the surface of CDs [14]. The excitation and emission uorescence spectrum of NRNC-CDs indicated that the maximum excitation exhibited at 354nm and the maximum emission at 456 nm.…”

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

“…Another example using carbon quantum dots was reported by Hou et al, in which iron (III) cations were used as fluorescence quenchers (Hou et al, 2020). Subsequent introduction of glyphosate resulted in strong interactions between the glyphosate and the iron (III) cations, which removed the cations from the proximity of the carbon dots and restored the fluorescence.…”

“…Although such pesticide-induced fluorescence quenching enables high performance sensors, there are situations in which turn-on fluorescence sensors for pesticides might be more beneficial. Efforts to address this issue are ongoing, and include the use of pesticide-induced disruption of electron transfer that restores the electron donor's innate luminescence (Hou et al, 2020). More broadly, efforts to solve unsolved challenges in fluorescencebased pesticide detection are expected to lead to future developments and significant advances in pesticide research.…”