Design of Metal‐Free Polymer Carbon Dots: A New Class of Room‐Temperature Phosphorescent Materials

Tao, Songyuan; Lu, Siyu; Geng, Yijia; Zhu, Shoujun; Redfern, Simon A. T.; Song, Yubin; Feng, Tanglue; Xu, Weiqing; Yang, Bai

doi:10.1002/anie.201712662

Cited by 496 publications

(389 citation statements)

References 48 publications

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“…Meanwhile, excitation‐dependent fluorescence emission was observed when Gly‐CDs were excited with different wavelengths from 300 to 410 nm(Figure 1e), due to the normal size distribution of Gly‐CDs 50. The UV–vis absorption spectrum and fluorescence spectrum are all consistent with CDs reported before 49,51. Figure 1f shows the Gly‐CDs functional groups measured by the Fourier transform infrared spectroscopy (FT‐IR).…”

Section: Resultsmentioning

confidence: 99%

Glycyrrhizic‐Acid‐Based Carbon Dots with High Antiviral Activity by Multisite Inhibition Mechanisms

Tong

Zhou

et al. 2020

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With the gradual usage of carbon dots (CDs) in the area of antiviral research, attempts have been stepped up to develop new antiviral CDs with high biocompatibility and antiviral effects. In this study, a kind of highly biocompatible CDs (Gly‐CDs) is synthesized from active ingredient (glycyrrhizic acid) of Chinese herbal medicine by a hydrothermal method. Using the porcine reproductive and respiratory syndrome virus (PRRSV) as a model, it is found that the Gly‐CDs inhibit PRRSV proliferation by up to 5 orders of viral titers. Detailed investigations reveal that Gly‐CDs can inhibit PRRSV invasion and replication, stimulate antiviral innate immune responses, and inhibit the accumulation of intracellular reactive oxygen species (ROS) caused by PRRSV infection. Proteomics analysis demonstrates that Gly‐CDs can stimulate cells to regulate the expression of some host restriction factors, including DDX53 and NOS3, which are directly related to PRRSV proliferation. Moreover, it is found that Gly‐CDs also remarkably suppress the propagation of other viruses, such as pseudorabies virus (PRV) and porcine epidemic diarrhea virus (PEDV), suggesting the broad antiviral activity of Gly‐CDs. The integrated results demonstrate that Gly‐CDs possess extraordinary antiviral activity with multisite inhibition mechanisms, providing a promising candidate for alternative therapy for PRRSV infection.

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Section: Resultsmentioning

confidence: 99%

Glycyrrhizic‐Acid‐Based Carbon Dots with High Antiviral Activity by Multisite Inhibition Mechanisms

Tong

Zhou

et al. 2020

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180

165

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“…Herein we use sodium alginate, a biopolymer obtained from brown seaweed, along with ethylenediamine to prepare carbon dots via a hydrothermal method. The synthetic details were reported previously . Figure shows a TEM image of the CDs synthesized.…”

Section: Figurementioning

confidence: 99%

Carbon Dots as a Promising Green Photocatalyst for Free Radical and ATRP‐Based Radical Photopolymerization with Blue LEDs

et al. 2020

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Carbon dots (CDs) have been used for the first time as a sensitizer to initiate and activate free radical and controlled radical polymerization, respectively, based on an ATRP protocol with blue LEDs. Consideration of diverse heteroatom‐doped CDs indicated that N‐doped CDs could serve as an effective photocatalyst and photosensitizer in combination with LEDs emitting either at 405 nm or 470 nm. Free radical polymerization was initiated by combining the CDs with an iodonium or sulfonium salt in tri(propylene glycol) diacrylate. Polymerization of methyl methacrylate (MMA) by photo‐induced ATRP was achieved with CDs and ethyl α‐bromophenylacetate using CuII as catalyst in the ppm range. The polymers obtained showed temporal control, narrower dispersity ≲1.5, and chain‐end fidelity. The first‐order kinetics and ON/OFF experiments additionally gave evidence of the constant concentration of polymer radicals. No remarkable cytotoxic activity was observed for the CDs, underlining their biocompatibility.

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“…The broad bands at 3000–3500 cm −1 were assigned to stretching vibrations of amino (NH 2 ) and hydroxy (OH) groups. The peaks at 1150, 1450, and 1610 cm −1 also related to the CO and OH bonds, indicating there were oxygen‐rich properties of both N‐CNRs, and the peak at ≈1750 was attributed to the CO bond . Therefore, it can be concluded that the functional groups improved the hydrophilicity of the N‐CNRs in an aqueous solution system, which was expected to render the N‐CNRs with an excellent water solubility characteristic.…”

Section: Comparison Between Three Types Of Previously Studied Carbon mentioning

confidence: 92%

Synthesis of Highly Fluorescent Yellow‐Green N‐Doped Carbon Nanorings for pH Variation Detection and Bioimaging

Zhong

et al. 2018

Part & Part Syst Charact

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A facile and direct chemical route is developed to produce intercrossed N‐doped graphene carbon nanorings (N‐CNRs) with a high yellow‐green photoluminescence emission in both solid and aqueous states. The N‐CNRs are directly synthesized at an elevated temperature in an inert atmosphere without additional pressure using urea and sodium citrate as raw materials. N‐CNRs have a photoluminescence change phenomenon from green to blue when the pH is altered from a neutral to a base value. The luminescence mechanism is analyzed under absorbance and lifetime decay, X‐ray photoelectron spectra, and X‐ray absorption near edge structure spectroscopy. Results indicate how the optical properties are tuned. The fluorescence bioimaging of zebrafish using N‐CNRs as the probe is also studied in terms of zebrafish husbandry, embryo harvesting, and the introduction of N‐CNRs into embryos and juveniles by soaking and microinjection. The prepared N‐CNRs serve as a promising fluorescent probe for pH variation analysis, and bioimaging. The N‐CNTs show potential for use in air purification applications.

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Design of Metal‐Free Polymer Carbon Dots: A New Class of Room‐Temperature Phosphorescent Materials

Cited by 496 publications

References 48 publications

Glycyrrhizic‐Acid‐Based Carbon Dots with High Antiviral Activity by Multisite Inhibition Mechanisms

Glycyrrhizic‐Acid‐Based Carbon Dots with High Antiviral Activity by Multisite Inhibition Mechanisms

Carbon Dots as a Promising Green Photocatalyst for Free Radical and ATRP‐Based Radical Photopolymerization with Blue LEDs

Synthesis of Highly Fluorescent Yellow‐Green N‐Doped Carbon Nanorings for pH Variation Detection and Bioimaging

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