Green-emitting carbon quantum dots as a dual-mode fluorescent and colorimetric sensor for hypochlorite

Electrogenerated chemiluminescence of luminol at a boron-doped diamond electrode for the detection of hypochlorite

“…It seems that hypochlorite and luminol exhibit direct chemiluminescence (CL) under alkaline conditions without any catalyst. 32,33 This argument was confirmed by a blue luminescence seen on the surface of the BDD electrode directly after the addition of 10 mM NaClO without any potential applied (ESI; S2 †). Accordingly, it is concluded that the ECL signal was generated by the remaining luminol that did not react with hypochlorite through the CL reaction.…”

“…Having the same characteristic with H 2 O 2 as reactive oxygen species (ROS), 32,33 hypochlorite was expected to act as a coreactant in the ECL system; indeed it quenches the ECL signals. It seems that hypochlorite and luminol exhibit direct chemiluminescence (CL) under alkaline conditions without any catalyst.…”

Carbon nanodots with a controlled N structure by a solvothermal method for generation of reactive oxygen species under visible light

“…A sharp amido peak (C=O) at 1650 cm −1 was observed in the spectrum of B‐CNDs, indicating that the formamide used as a reaction solvent may have become incorporated into the carbon structure of the CNDs. [ 48 ] G‐CNDs showed a different spectrum pattern from B‐CNDs: hydrophilic functional groups from phenolic –OH (1320 cm −1 ) and –NH 2 (1619 cm −1 ) were dominantly observed, [ 49,50 ] in addition to aromatic vibration peaks (880, 954, and 1036 cm −1 ), and conjugated C=C (1435 and 1619 cm −1 ). These hydrophilic functional groups imparted the G‐CNDs with high dispersibility in water.…”

“…A sharp amido peak (C=O) at 1650 cm À1 was observed in the spectrum of B-CNDs, indicating that the formamide used as a reaction solvent may have become incorporated into the carbon structure of the CNDs. [48] G-CNDs showed a different spectrum pattern from B-CNDs: hydrophilic functional groups from phenolic -OH (1320 cm À1 ) and -NH 2 (1619 cm À1 ) were dominantly observed, [49,50] CNDs at +4.6 mV and +20 mV, respectively. The significantly higher positive value of G-CNDs reflects the rich amino groups of G-CNDs, [51] which is consistent with the result of the corresponding FTIR spectrum.…”

Novel fluorescence sensor for the selective recognition of tetracycline based on molecularly imprinted polymer-capped N-doped carbon dots

“…CDs can be synthesized by many methods including hydrothermal reactions, 15 microwave-assisted technique, 16 laser ablation, 17 chemical oxidation 18 and solid-state reaction. 19 Compared with other methods, microwave-assisted technology has many advantages, such as simplicity, environmental protection, economy, short reaction time, low energy consumption and high reaction yield. The synthesis of CDs can use the microwave oven.…”