Synthesizing carbon dots with functional preservation strategy as a facile ratiometric fluorescent sensing platform for monitoring hypochlorite in living cells and zebrafish

A fluorescence digital image-based method using carbon quantum dots to evaluate the compliance of a biocidal agent

“…In fact, the FDIB method with CQDs contrasts with most colorimetric techniques that make use of environmentally harmful reagents such as N , N -diethyl- p -phenylenediamine (DPD) and o -tolidine, the latter being even a carcinogen compound. Moreover, Zhou et al 60 employed a spectrofluorometer with a sensitive detector based on photomultipliers leading to a low detection limit of 0.067 μmol L −1 for hypochlorite quantification in water using a 4 mL conventional cuvette. However, this method is not to be used for in situ applications as it employs expensive equipment.…”

The construction of dual-emissive ratiometric fluorescent probes based on fluorescent nanoparticles for the detection of metal ions and small molecules

“…A paper strip based on this mechanism was prepared for semiquantitative visual detection. 56 A similar reference DRFP was constructed by mixing two types of FNPs, such as green CDs (g-CDs) mixed with r-CDs for the detection of ClO − , in which g-CDs acted as the reference; 57 b-CDs were mixed with dark-red emission CuInS 2 /ZnS QDs for the detection of chlortetracycline, while QDs acted as the reference; 58 b-CDs mixed with orange emission AgInS 2 QDs for the detection of ibandronic acid, while b-CDs acted as the reference; 59 blue emission Ln-MOFs (Eu-PTA, PTA as terephthalic acid) were mixed with red emission Ln-MOF Eu-DPA(DPA: dipicolinic acid) for the detection of H 2 O 2 , while Eu-DPA acted as the reference; 60 b-CDs were mixed with red CuNCs for the detection of thiram, in which b-CDs acted as the reference; 61 and b-CDs were mixed with the red-emitting fluorescent dye 1-aminoanthraquinone for the detection of histamine, in which the dye acted as the reference. 62…”

One-pot synthesis of efficient multifunctional nitrogen-doped carbon dots with efficient yellow fluorescence emission for detection of hypochlorite and thiosulfate

“…1E, the NCDs have two absorption peaks at 373 nm and 461 nm, of which the absorption peak at 373 nm is caused by the n-p* transition of the CQO and CQN bonds. 33 The broadband absorption at 461 nm may be attributed to the surface states composed of low-energy absorption bands, especially of the functional groups present on the NCDs surface. 38 It also can be clearly observed that the optimal excitation emission was located at 554 nm with an excitation wavelength of 378 nm.…”

“…Very recently, some studies have reported fluorescent probes for the recognition of ClO − using CDs. 32,33 For example, Silva et al 34 synthesized fluorescent CDs for the selective identification of ClO − based on the pH-dependent redox reaction between ClO − and the oxygen and nitrogen functionalities and dangling bonds on the CDs surface. Sun et al 35 designed an “ON–OFF–ON” nanosensor based on NCDs for discriminating ClO − via static quenching.…”