Visible-light excitable thermally activated delayed fluorescence in aqueous solution from F, N-doped carbon dots confined in silica nanoparticles

Mo, Luoqi; Xu, Xiaokai; Liu, Zhiming; Líu, Hao; Lei, Bingfu; Zhuang, Jianle; Guo, Zhouyi; Liu, Yingliang; Hu, Chaofan

doi:10.1016/j.cej.2021.130728

Cited by 69 publications

(69 citation statements)

References 48 publications

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“…[ 17 ] Moreover, we have recently achieved the first visible‐light excitable delayed fluorescence and the nanoparticles monodispersed in water through an improved sol‐gel process. [ 18 ] Obviously, silica plays an important role in the development of CDs‐based afterglow in water. In the CDs@SiO 2 assembly, the amorphous silica plays a dual role in suppressing the non‐radiative transition of triplet excitons and conferring excellent hydrophilic properties to the hybridization systems by the abundant silica hydroxyl groups.…”

Section: Introductionmentioning

confidence: 99%

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Líu

Liu

et al. 2022

Advanced Optical Materials

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There are still huge challenges in the development of carbon dots (CDs) based long afterglow materials with multicolor emissions, especially in aqueous solutions. This work reports a novel strategy of achieving of multicolor long afterglow in aqueous solution by incorporating phosphorescent CDs and fluorescent dyes into sub‐20 nm monodispersed silica nanoparticles. The silica matrix not only stabilizes the triplet excitons of CDs but also facilitates the efficient cascade Förster resonance energy transfer between the phosphorescent donor (CDs) and the energy acceptor (fluorescent dyes), which enables intensive multicolor long afterglow with adjustable wavelength from 510 to 610 nm and the largest Stokes shift of 255 nm. Based on these multicolor long afterglow nanoparticles, some time‐resolved, color multiple information encryptions are designed. By eliminating background noise, the signal‐to‐noise ratio of in vivo afterglow imaging is as high as 155.1 in the in vivo imaging system. Interestingly, the afterglow signal in mice can be easily and conveniently collected by the camera of cell phones, which may make in vivo bioimaging portable and inexpensive. This study will provide new ideas for the synthesis of multicolor CDs‐based long afterglow materials in solutions.

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Section: Introductionmentioning

confidence: 99%

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Líu

Liu

et al. 2022

Advanced Optical Materials

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“…6 Compared with the traditional uorescent semiconductor quantum dots and organic dyes, CDs have unique physical and chemical properties, such as adjustable surface groups, excellent optical properties, better optical stability, good biocompatibility, water solubility, low toxicity, and environmental friendliness. [7][8][9][10][11][12][13][14][15][16][17] Due to their high quantum yield and adjustable uorescence characteristics, CDs have been widely used in photoelectric elds such as light-emitting diodes and luminescent solar concentrators. 18,19 However, these applications have not fully utilized the excellent physical and chemical properties of CDs, such as high electron transfer efficiency, wide light absorption range, and catalytic activity brought about by abundant surface-active sites.…”

Section: Introductionmentioning

confidence: 99%

Carbon dot/inorganic nanomaterial composites

Cai

et al. 2022

J. Mater. Chem. A

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“…The nanoparticles were found to be quasi-spherical (seen in Figure 1 a), and the average size was estimated to be 5.5 ± 0.1 nm, based on 83 particles using the Gaussian distribution calculation ( Figure 1 b). The lattice spacing was further measured as 0.32 nm, corresponding to the (002) diffraction plane of graphite [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

et al. 2022

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Carbon dots (CDs) have caught enormous attention owing to their distinctive properties, such as their high water solubility, tunable optical properties, and easy surface modification, which can be generally used for the detection of heavy metals and organic pollutants. Herein, nitrogen and fluorine co-doped carbon dots (NFCDs) were designed via a rapid, low-cost, and one-step microwave-assisted technique using DL-malic acid and levofloxacin. The NFCDs emitted intense green fluorescence under UV lighting, and the optical emission peak at 490 nm was observed upon a 280 nm excitation, with a high quantum yield of 21.03%. Interestingly, the spectral measurements illustrated excitation-independent and concentration-independent single-color fluorescence owing to the presence of nitrogen and fluorine elements in the surface functional groups. Additionally, the NFCDs were applied for the selective detection of Fe3+ and ascorbic acid based on the “turn-off” mode. The detection limits were determined as 1.03 and 4.22 µM, respectively. The quenching mechanisms were explored using the static quenching mechanism and the inner filter effect. Therefore, a NFCDs fluorescent probe with single color emission was successfully developed for the convenient and rapid detection of Fe3+ and ascorbic acid in environments.

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Visible-light excitable thermally activated delayed fluorescence in aqueous solution from F, N-doped carbon dots confined in silica nanoparticles

Cited by 69 publications

References 48 publications

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Carbon dot/inorganic nanomaterial composites

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

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