Carbon quantum dots based ratiometric fluorescence probe for sensitive and selective detection of Cu2+ and glutathione

Fluorescent and Colorimetric Sensors Based on the Oxidation of o-Phenylenediamine

“…Later, by using carbon quantum dots (CQDs) as reference fluorophore, a ratiometric fluorescence sensor for GSH was developed. 16 Cu 2+ -catalyzed oxidation of OPD results in the fluorescent quenching of CQDs due to the FRET between OPDox and CQDs. The coordination effect between GSH and Cu 2+ could prevent the oxidative reaction, and thus in turn restore fluorescent emission of CQDs.…”

Near‐infrared emission Cu, N‐doped carbon dots for human umbilical vein endothelial cell labeling and their biocompatibility in vitro

“…The lifetime of Cu, N‐doped CDs and GSH/Cu, N‐doped CDs was calculated to be 5.32 and 4.01 ns, respectively (Figure 3F). The result showed that the fluorescence lifetime of GSH/Cu, N‐doped CDs was decayed, demonstrating that the fluorescence quenching of Cu, N‐doped CDs by GSH was caused by fluorescence resonance energy transfer (FRET) (Han et al, 2019).…”

“…Among the carbon NMs, carbon dots (CDs) are a new kind of zero‐dimensional carbon‐based luminescent materials with multiple advantages over most traditional fluorescent materials due to their excellent sensitivity for target analytes and surface functionalization capabilities (Chang et al, 2019; Gao et al, 2018; G. Liu, Chai, et al, 2020). These excellent properties enable CDs to be widely used in the fields of drug/gene delivery (Panwar et al, 2019), photodynamic therapy (S. Sun et al, 2020), sensing (Han et al, 2019), photocatalyst (Si, Guo, Wang, Liu, & Ren, 2020), bio‐imaging (Lu et al, 2017), and so forth. Up to now, various methods have been developed to prepare multifunctional and specific CDs, such as arc discharge, electrochemical oxidation, and solvothermal synthesis, which accelerate the pace of biomedical fields (Jiang, Sun, Zhang, Lu, et al, 2015; X. Xu et al, 2004; F. Yuan et al, 2015).…”

Synthesis of Nopinone-Based Quinazolin-2-amine Fluorescent Probe for Detection of Cu2+and Its Application Research

“…[1][2][3][4][5][6][7] Among them, the fluorescent probes for the de-tection of Cu 2＋ with an excellent sensitivity and selectivity obtained researchers' attention in particular. [8][9][10][11][12][13][14] Copper was the third most abundant metal ranking second to aluminum and iron, and widely distributed in water and soil environments in the ionic state. As a kind of common and deleterious heavy metal, copper was widely applied in industrial, agricultural, and domestic fields owing to its excellent conductivity, thermal conductivity, and ductility, which results in heavy pollution to water and land environment.…”