Preparation and application of high-brightness red carbon quantum dots for pH and oxidized <scp>l</scp>-glutathione dual response

Du, Yu‐Zhou; Cao, Lei; Li, Xinlu; Zhu, Tongtong; Yan, Rui; Dong, Wen‐Fei; Li, Li

doi:10.1039/d3an00383c

Cited by 3 publications

(2 citation statements)

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“…The absorption peaks at 1625 ∼ 1640 cm −1 are stretching vibrations of C=O, and the absorption peak at 1430 cm −1 is due to the vibration of the aromatic C=C skeleton. 15 The absorption peaks at 1250 ∼ 1270 cm −1 are due to the C-O stretching vibration, and the absorption peaks at 1070 ∼ 1090 cm −1 are due to the C-N stretching vibration. The results show that carbon quantum dots contain abundant hydrophilic groups on the surface and have good water solubility.…”

Section: Resultsmentioning

confidence: 98%

“…9 Compared to conventional inorganic and organic fluorescent materials, 10,11 the excellent fluorescence properties and low cytotoxicity of CQDs enable their use for bioimaging. 12,13 Ding et al 14 used surface-modified CQDs to label Hela cells, and based on experimental results found that the half lethal concentration of CQDs at 24 h was more than one hundred times the concentration required for cell imaging.CQDs are synthesized from various sources, such as 1,2-diamino-4-bromobenzene, 15 peony pollen, 16 citric acid and nile blue, 17 and cysteine, 18 which are used to synthesize CQDs, and different precursors confer different physicochemical and functional properties to CQDs. 19 Different nitrogen sournctional properties.…”

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confidence: 99%

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Preparation of Highly Luminescent Carbon Quantum Dots and Study of Bioimaging

Fu,

Zhang,

et al. 2023

ECS J. Solid State Sci. Technol.

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Using ammonium citrate as the carbon source and urea, ammonia and ethylenediamine as the nitrogen sources, CQDs with different nitrogen sources were prepared by hydrothermal method, and the preparation conditions were optimized to obtain CQDs with the best fluorescence performance for three different nitrogen sources.The fluorescence colors of the three CQDs were not significantly different, all of them were blue, indicating that different nitrogen sources did not have significant differences on the fluorescence color, but had some effects on the fluorescence intensity, and the yields of 1-CQDs, 2-CQDs and 3-CQDs were 0.22, 0.29 and 0.529, respectively.The UV, natural light, pH and ionic stability of CQDs with different nitrogen sources were investigated, and the results showed that 3-CQDs have UV, natural light and ionic stability, and all three CQDs have pH instability.The MTT method shows that 3-CQDs have lower cytotoxicity than the other two CQDs, and the bioimaging experiments show that 3-CQDs bind to yeast in greater numbers and have stronger fluorescence intensity, which proves that they are more suitable for bioimaging, laying a theoretical foundation for the bioimaging of CQDs at a later stage.

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Section: Resultsmentioning

confidence: 98%

mentioning

confidence: 99%

Preparation of Highly Luminescent Carbon Quantum Dots and Study of Bioimaging

Fu,

Zhang,

et al. 2023

ECS J. Solid State Sci. Technol.

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Comprehensive Overview of Controlled Fabrication of Multifunctional Fluorescent Carbon Quantum Dots and Exploring Applications

Yang,

An,

et al. 2024

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In recent years, carbon dots (CDs) have garnered increasing attention due to their simple preparation methods, versatile performances, and wide‐ranging applications. CDs can manifest various optical, physical, and chemical properties including quantum yield (QY), emission wavelength (Em), solid‐state fluorescence (SSF), room‐temperature phosphorescence (RTP), material‐specific responsivity, pH sensitivity, anti‐oxidation and oxidation, and biocompatibility. These properties can be effectively regulated through precise control of the CD preparation process, rendering them suitable for diverse applications. However, the lack of consideration given to the precise control of each feature of CDs during the preparation process poses a challenge in obtaining the requisite features for various applications. This paper is to analyze existing research and present novel concepts and ideas for creating CDs with different distinct features and applications. The synthesis methods of CDs are discussed in the first section, followed by a comprehensive overview of the important properties of CDs and the modification strategy. Subsequently, the application of CDs and their requisite properties are reviewed. Finally, the paper outlines the current challenges in controlling CDs properties and their applications, discusses potential solutions, and offers suggestions for future research.

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pH response mechanism of bifunctional fluorescent carbon quantum dots and application in cancer detection and bioself-targeting imaging

Hu,

Zhang,

et al. 2024

Journal of Molecular Structure

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Preparation and application of high-brightness red carbon quantum dots for pH and oxidized l-glutathione dual response

Abstract: Carbon dots (CDs) with red fluorescence emission are highly desirable for use in bioimaging and trace substance detection, with potential applications in biotherapy, photothermal therapy, and tumor visualization. Most of...

Cited by 3 publications

References 55 publications

Preparation of Highly Luminescent Carbon Quantum Dots and Study of Bioimaging

Preparation of Highly Luminescent Carbon Quantum Dots and Study of Bioimaging

Comprehensive Overview of Controlled Fabrication of Multifunctional Fluorescent Carbon Quantum Dots and Exploring Applications

pH response mechanism of bifunctional fluorescent carbon quantum dots and application in cancer detection and bioself-targeting imaging

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