Exploration of nitrogen-doped grape peels carbon dots for baicalin detection

Tang, Xiaodan; Wang, Jianji; Yu, Hongmei; Bui, Brian; Zhang, Wei; Wang, Shaoyan; Chen, Mingli; Yuan, Liqin; Hu, Zhizhi; Chen, Wei

doi:10.1016/j.mtphys.2021.100576

Cited by 36 publications

(22 citation statements)

References 52 publications

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“…Therefore, the self-matrix structure effectively inhibits the non-radiative transition by blocking the movement of the polymer chain, and can also strongly prevent oxygen quenching, presenting RTP at room temperature. In addition, the carbon dots can find applications in sensing [63][64][65], photodynamic activation on cancer treatment [66][67][68] and imaging [69][70][71], which are the topics for our research.…”

Section: Rtp Mechanism Of Aa-cpdsmentioning

confidence: 99%

Self-Matrix N-Doped Room Temperature Phosphorescent Carbon Dots Triggered by Visible and Ultraviolet Light Dual Modes

Wang

AL-Zubi

et al. 2022

Nanomaterials

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The synthesis of room temperature phosphorescent carbon dots (RTP-CDs) without any matrix is important in various applications. In particular, RTP-CDs with dual modes of excitation are more interesting. Here, we successfully synthesized matrix-free carbonized polymer dots (CPDs) that can generate green RTP under visible and ultraviolet light dual-mode excitation. Using acrylic acid (AA) and ammonium oxalate as precursors, a simple one-pot hydrothermal method was selected to prepare AA-CPDs. Here, acrylic acid is easy to polymerize under high temperature and high pressure, which makes AA-CPDs form a dense cross-linked internal structure. Ammonium oxalate as a nitrogen source can form amino groups during the reaction, which reacts with a large number of pendant carboxyl groups on the polymer chains to further form a cross-linked structure. The carboxyl and amino groups on the surface of AA-CPDs are connected by intermolecular hydrogen bonds. These hydrogen bonds can provide space protection (isolation of oxygen) around the AA-CPDs phosphor, which can stably excite the triplet state. This self-matrix structure effectively inhibits the non-radiative transition by blocking the intramolecular motion of CPDs. Under the excitation of WLED and 365 nm ultraviolet light, AA-CPDs exhibit the phosphorescence emission at 464 nm and 476 nm, respectively. The naked-eye observation exceeds 5 s and 10 s, respectively, and the average lifetime at 365 nm excitation wavelength is as long as 412.03 ms. In addition, it successfully proved the potential application of AA-CPDs in image anti-counterfeiting.

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Section: Rtp Mechanism Of Aa-cpdsmentioning

confidence: 99%

Self-Matrix N-Doped Room Temperature Phosphorescent Carbon Dots Triggered by Visible and Ultraviolet Light Dual Modes

Wang

AL-Zubi

et al. 2022

Nanomaterials

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“…The main features of PET occurring are: 1) the energy gap of reductive PET is between the LUMO (quenchers) and HOMO (g-CDs); and 2) the energy gap of oxidative PET is between LUMO (g-CDs) and LUMO (quencher). [74] Tang et al [75] [77] Copyright 2021, Elsevier.…”

Section: Photoinduced Electron Transfermentioning

confidence: 99%

“…Figure 12. a) The UV absorption spectra of baicalin, emission spectra, and excitiation spectra of g-CDs. b) The LUMO, HOMO of baicalin, and g-CDs.Reproduced with permission [75]. Copyright 2022, Elsevier.…”

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confidence: 99%

Application Progress of Green Carbon Dots in Analysis and Detection

Zuo

et al. 2022

Part & Part Syst Charact

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Green chemistry is currently attracting more and more attention due to its eco‐friendly, and green carbon dots (g‐CDs) are creating a research boom. The g‐CDs have huge application prospects in analysis and detection due to their excellent optical properties, high biocompatibility, and low toxicity compared to other fluorescent materials. Based on the study of g‐CDs, the optical properties, synthesis methods, surface modification methods, and sensing mechanisms of g‐CDs are outlined, and the application in analysis and detection of environmental, food, biomolecules, and other organic small molecules are reviewed. At the same time, the challenges faced by g‐CDs are outlined. This review provides valuable references for further research and wider application of g‐CDs.

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“…[6][7][8] At present, many materials have been used for preparing CDs, including small molecular carbon materials, [9][10][11] macromolecular polymers 12,13 and various biomass materials. [14][15][16] Among them, CDs derived from chemical molecules often involve prime cost, transportation issues and safety risks, especially human and environmental safety risks. People are worried about the toxicity of carbon sources, as well as the by-products and degradation products from the reactions.…”

Section: Introductionmentioning

confidence: 99%