A novel anodic electrochemiluminescence behavior of sulfur-doped carbon nitride nanosheets in the presence of nitrogen-doped carbon dots and its application for detecting folic acid

Optimization of Ionic Liquid-Mediated Red-Emission Carbon Dots and Their Imaging Application in Living Cells

“…Because of the outstanding merits of CDs including superior optical properties, high photostability, robust chemical inertness, low toxicity, excellent biocompatibility, facile preparation, and easy modification, they have aroused tremendous research interest. Particularly, they are regarded as one of the most promising nanomaterials for fluorescent sensors, , drug delivery, photocatalysis, bioimaging, − and optoelectronic devices. − Great efforts have been made by scientists to improve the fluorescence quantum yield (QY) of CDs, and now, thousands of precursors have been reported for the synthesis of CDs by several different synthetic approaches such as hydro-/solvothermal synthesis assay, laser ablation, pyrolysis, ultrasonication, microwave treatments, electrochemical oxidation, and so on. − However, most of the prepared CDs emitted blue or green fluorescence under ultraviolet excitation, which distinctly restricts their applications, especially in fluorescence imaging, as the blue autofluorescence of biological matrixes could mask the signal of CDs and UV light irradiation could also cause photodamage to cells and tissues. , One approach to overcome this problem is to shift the wavelength of CDs to the red or near-infrared region, where cells have weaker autofluorescence. Therefore, CDs with red or near-infrared emission are more suitable for bioimaging. − Another motivation for synthesizing red-emission CDs (R-CDs) is that red phosphor is one of the primary tricolors for fabricating full-color-emitting and display devices.…”

Element-doped graphitic carbon nitride: confirmation of doped elements and applications

“…15(d)). 203 It was found that the ECL signal was gradually decreased with the addition of folic acid in the S-doped g-CN nanosheets/N-doped carbon dots system (Fig. 15(e)).…”

Electrochemiluminescence of Carbon‐based Quantum Dots: Synthesis, Mechanism and Application in Heavy Metal Ions Detection

“…In addition to Ru(bpy) 3 2 + , carbon-based quantum dots can also be used as co-reactants for other luminophores. For example, Zhu et al reported that N-CQDs are a coreactant of S-g-C 3 N 4 NSs and significantly enhanced anode ECL signal (about 83 times) [85]. The mechanism of anodic ECL is shown in Figure 13…”

“…For example, Zhu et al. reported that N‐CQDs are a co‐reactant of S‐g‐C 3 N 4 NSs and significantly enhanced anode ECL signal (about 83 times) [85]. The mechanism of anodic ECL is shown in Figure 13: S‐g‐C 3 N 4 NSs and N‐CQDs are electro‐oxidized to form S‐g‐C 3 N 4 NSs .+ and N‐CQDs .+ radicals.…”