Nitrogen doped carbon quantum dots (N-CQDs) with high luminescence for sensitive and selective detection of hypochlorite ions by fluorescence quenching

Carbon Quantum Dots with High Photothermal Conversion Efficiency and Their Application in Photothermal Modulated Reversible Deformation of Poly(N-isopropylacrylamide) Hydrogel

“…Two absorption peaks at 264 and 340 nm (Figure a) are found in the UV–vis spectra of all CQDs, which are assigned to the π–π* transition of the aromatic sp 2 structure and the n−π* transition of CN/CO, respectively. The appearance of these two characteristic peaks confirms the formation of CQDs . The absorption peaks at 410 and 550 nm are caused by N and O surface states of CQDs. , Interestingly, a distinct absorption in the NIR region with an extinction coefficient of 0.39 L g –1 cm –1 (650 nm) is found in the UV–vis spectrum of CQDs-7-1, hinting that these CQDs have the capability of converting NIR light to thermal energy.…”

“…The appearance of these two characteristic peaks confirms the formation of CQDs. 11 The absorption peaks at 410 and 550 nm are caused by N and O surface states of CQDs. 39,46 Interestingly, a distinct absorption in the NIR region with an extinction coefficient of 0.39 L g −1 cm −1 (650 nm) is found in the UV−vis spectrum of CQDs-7-1, hinting that these CQDs have the capability of converting NIR light to thermal energy.…”

“…Carbon quantum dots (CQDs) are a kind of carbon-based nanomaterial with sizes less than 10 nm. Most CQDs are easily prepared using various precursors and have good water solubility, low toxicity, photostability, and tunable fluorescence. − The optical properties of CQDs were paid more attention since they were discovered. However, some CQDs have also been designed to have absorptions in the visible to NIR region in order to be used as PTAs in recent years. , Such CQDs combine the advantages of traditional semiconductor quantum dots (small size, photoluminescence, and photostability) and organic PTAs (tunable photothermal effect and optical properties).…”

A phosphine-based fluorescent probe for fluorescent imaging of hypochlorous acid in living cells and zebrafish

“…9–13 Many HOCl fluorescence probes have been developed based on different reporting groups, such as oxidation reactions based on chalcogen atoms, selective oxidation of oximes and hydrazones, oxidative deprotection of amino phenols, and oxidation cleavage of electron-deficient double bonds, resulting in probes with excellent photophysical properties (see Table S1, ESI†). 14–37 However, some probes still have shortcomings, such as low sensitivity, poor photostability, unsatisfactory quantum yield, and short excitation and emission wavelengths. 38,39 Precise in situ imaging of HOCl in living organisms remains challenging due to its short lifespan and high reactivity.…”

N-doped carbon dots as robust fluorescent probes for the rapid detection of hypochlorite

“…The N-doped CDs can serve as FL sensors to detect hypochlorite with the detection limit of 0.43 μM. 26 In addition, Xia group fabricated color tunable “multicenter-emitting” CDs employing m -aminophenol as the carbon source. 27 The colors of CDs solution changed from yellow-green to blue upon the addition of HClO, the process of dynamics monitoring oxidative stress was observed in vivo as well.…”