A Photochemical Avenue to Photoluminescent N-Dots and their Upconversion Cell Imaging

Jin, Qianqian; Gubu, Amu; Chen, Xiuxian; Tang, Xinjing

doi:10.1038/s41598-017-01663-x

Cited by 10 publications

(3 citation statements)

References 40 publications

(35 reference statements)

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“…The Raman spectrum for CNOs shows four characteristic bands at approximately 1342 (D band), 1581 (G band), 2679 and 2925 cm −1 . Two prominent bands, D and G, are attributed to the A 1g vibration mode of the disorder-induced Raman line and the E 2g vibration of sp 2 -hybridized carbon atoms in the ordered graphite structure, respectively 32 . Second-order features between 2600 and 3000 cm −1 are the overtones of fundamental tones due to symmetry breaking 33 .…”

Section: Resultsmentioning

confidence: 99%

Three-dimensional organization of pyrrolo[3,2-b]pyrrole-based triazine framework using nanostructural spherical carbon: enhancing electrochemical performance of materials for supercapacitors

Hryniewicka

Breczko

Siemiaszko

et al. 2023

Sci Rep

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Covalent triazine-based frameworks have attracted much interest recently due to their high surface area and excellent thermal and electrochemical stabilities. This study shows that covalently immobilizing triazine-based structures on spherical carbon nanostructures results in the organization of micro- and mesopores in a three-dimensional manner. We selected the nitrile-functionalized pyrrolo[3,2-b]pyrrole unit to form triazine rings to construct a covalent organic framework. Combining spherical carbon nanostructures with the triazine framework produced a material with unique physicochemical properties, exhibiting the highest specific capacitance value of 638 F g−1 in aqueous acidic solutions. This phenomenon is attributed to many factors. The material exhibits a large surface area, a high content of micropores, a high content of graphitic N, and N-sites with basicity and semi-crystalline character. Thanks to the high structural organization and reproducibility, and remarkably high specific capacitance, these systems are promising materials for use in electrochemistry. For the first time, hybrid systems containing triazine-based frameworks and carbon nano-onions were used as electrodes for supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Three-dimensional organization of pyrrolo[3,2-b]pyrrole-based triazine framework using nanostructural spherical carbon: enhancing electrochemical performance of materials for supercapacitors

Hryniewicka

Breczko

Siemiaszko

et al. 2023

Sci Rep

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“…The spectral feature at 1626 cm −1 corresponds to the aziridine ring (by which the organic molecule is immobilized on the spherical carbon material). 26 Moreover, in comparison to the organic substrate (4azidobenzonitryl), the absence of a band at 2107 cm −1 (characteristic of the stretching vibration of the -N3 group in organic azide) in the CNO-CN spectrum indicates that all azide groups reacted with the CNO surface to form aziridine bonds (-N<CNO). The trimerization of 2CNPP was confirmed by infrared spectroscopy (Figure 2B).…”

Section: Synthesis Of 2cnpp-based Ctfsmentioning

confidence: 99%

Pyrrolo[3,2-b]pyrrole-Based Covalent Triazine Framework: Three-dimensional Organization of Pores Using Nanostructural Spherical Carbon

Hryniewicka

Breczko

Siemiaszko

et al. 2022

Preprint

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This study shows that covalently immobilizing triazine-based structures on spherical carbon nanostructures results in the organization of micro- and mesopores in a three-dimensional manner. We selected the nitrile-functionalized pyrrolo[3,2-b]pyrrole unit to form triazine rings to construct a covalent organic framework. Combining spherical carbon nanostructures with the triazine framework produced a material with unique physicochemical properties, exhibiting the highest specific capacitance value of 638 F g-1 in aqueous acidic solutions. This phenomenon is attributed to many factors. The material exhibits a large surface area, a high content of micropores, a high content of graphitic N, and N-sites with basicity and semi-crystalline character. The hybrid systems containing triazines and carbon nano-onions were, for the first time, used as electrodes for supercapacitors. Thanks to the high structural organization and reproducibility, and remarkably high specific capacitance, these systems are a promising material for use in electrochemistry.

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“…Additionally, it displays strong blue photoluminescence and good optical absorption in the UV and near-visible region [60]. Futhermore, CQDs exhibit upconversion photoluminescence properties [19,[61][62][63] and exhibit promising electron transfer properties [64,65]. These optical characteristics of CQDs render them promising candidates as photosensitizers for photocatalytic applications.…”

Section: Visible-light Photocatalysis Of Carbon-based Materialsmentioning

confidence: 99%

CQD-Based Composites as Visible-Light Active Photocatalysts for Purification of Water

Makama¹,

Umar²,

AbdulkadirSaidu³

2018

Visible-Light Photocatalysis of Carbon-Based Materials

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The unique physicochemical properties of carbon quantum dot-(CQD)-based photocatalysts, notably their exceptionally good light absorption in the UV and near-visible region, tunable photoluminescence, extraordinary upconversion photoluminescence, outstanding electron affinity, and photoinduced electron transfer, and electron mobility, have attracted considerable attention in different photocatalytic applications. In this review, we summarized the fundamental mechanism and thermodynamics of heterogeneous photocatalysis of aqueous pollutants and the fundamental multifaceted roles of CQDs in photoredox process. Furthermore, we discussed the recent developments in the use of CQD-based materials as visiblelight active photocatalysts in water purification. Finally, the challenges and future direction of CQD-based materials as photocatalytic materials for environmental decontamination were highlighted.

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A Photochemical Avenue to Photoluminescent N-Dots and their Upconversion Cell Imaging

Cited by 10 publications

References 40 publications

Three-dimensional organization of pyrrolo[3,2-b]pyrrole-based triazine framework using nanostructural spherical carbon: enhancing electrochemical performance of materials for supercapacitors

Three-dimensional organization of pyrrolo[3,2-b]pyrrole-based triazine framework using nanostructural spherical carbon: enhancing electrochemical performance of materials for supercapacitors

Pyrrolo[3,2-b]pyrrole-Based Covalent Triazine Framework: Three-dimensional Organization of Pores Using Nanostructural Spherical Carbon

CQD-Based Composites as Visible-Light Active Photocatalysts for Purification of Water

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