Multicolor emissive carbon dot with solvatochromic behavior across the entire visible spectrum

Kundu, Aniruddha; Park, Byeongho; Oh, Ji Hye; Sankar, K. Vijaya; Ray, Chaiti; Kim, Wook Sung; Li, Junfu

doi:10.1016/j.carbon.2019.08.037

Cited by 67 publications

(47 citation statements)

References 47 publications

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“…The types of response mechanisms to pH include protonation and deprotonation, energy level changes, aggregation of CDs, generation of new groups, protective shells, and proton transfer. Recently, our group synthesized ES‐CDs using phenolic compounds, including resorcinol, 1,3‐naphthalenediol, and 2,7‐naphthalenediol [29] . We propose an excited state intramolecular proton transfer (ESIPT) mechanism as a possible mechanism for the double emission (blue to green), large Stokes shift, and long‐lived emission of ES‐CDs [30] .…”

Section: Introductionmentioning

confidence: 99%

Environment‐Sensitive Carbon Dots Derived from Naphthalenediol for Solvent Polarity Indicator and Anti‐Counterfeiting

Zhang

2022

ChemistrySelect

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Herein, a novel type of environment-sensitive carbon dots (ES-CDs) has been synthesized via ethanothermal reaction using 1,6-naphthalenediol as a carbon source and sulfuric acid as a catalyst. The morphology and structure of ES-CDs are characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectra (XPS). ES-CDs exhibit green and excitation wavelength independent emission in different solvents. Using the optical response of ES-CDs towards acetone-water binary mixtures with different composition, the sensitive detection of solvent polarity is realized based on the inner filter effect (IFE). The inkjet printed patterns of ES-CDs show a blue-to-green conversion as exposure to external vapor from hydrogen chloride to ammonia, and enable information to hide assisting with a laser direct writing. We believe that the environment-sensitive carbon dots developed in this study are potential candidates for solvent sensing and fluorescence anti-counterfeiting.

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Section: Introductionmentioning

confidence: 99%

Environment‐Sensitive Carbon Dots Derived from Naphthalenediol for Solvent Polarity Indicator and Anti‐Counterfeiting

Zhang

2022

ChemistrySelect

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“…The Raman spectrum of FeSO 4 clearly shows a sharp peak at 979 cm −1 attributed to the presence of S–O stretching bond [ 30 , 31 , 32 ]. The Raman spectrum of the NCDs after the treatment of Fe 2+ ions indicated that the peaks at (1322, 1587, and 1454) cm −1 , known as the disorder (D) band, crystalline (G) band [ 33 , 34 ], and -CH 2 stretching vibration [ 35 ], respectively, are more prominent compared to the non-treated NCDs, suggesting the initial characteristics of the NCDs appear after the removal of the fluorescence background due to the quenching fluorescent effect of Fe 2+ ions. In addition, a prominent peak found at 609 cm −1 in the Fe 2+ -treated NCDs is attributed to the formation of the Fe–O coordinate bond due to the coordinate bond formation between the Fe 2+ and O atoms on the surface of NCDs, while a weak peak in the same region was seen for FeSO 4 alone.…”

Section: Resultsmentioning

confidence: 99%

Fluorescent Carbon Dots for Sensitive and Rapid Monitoring of Intracellular Ferrous Ion

2022

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Although iron is an essential constituent for almost all living organisms, iron dyshomeostasis at a cellular level may trigger oxidative stress and neuronal damage. Hence, there are numerous reported carbon dots (CDs) that have been synthesized and applied to determine intracellular iron ions. However, among reported CDs focused to detect Fe3+ ions, only a few CDs have been designed to specifically determine Fe2+ ions over Fe3+ ions for monitoring of intracellular Fe2+ ions. We have developed the nitrogen-doped CDs (NCDs) for fluorescence turn-off detection of Fe2+ at cellular level. The as-synthesized NCDs exhibit a strong blue fluorescence and low cytotoxicity, acting as fluorescence probes to detect Fe2+ as low as 0.702 µM in aqueous solution within 2 min and visualize intracellular Fe2+ in the concentration range from 0 to 500 µM within 20 min. The as-prepared NCDs possess some advantages such as high biocompatibility, strong fluorescence properties, selectivity, and rapidity for intracellular Fe2+ monitoring, making NCDs an excellent nanoprobe for biosensing of intracellular ferrous ions.

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“…The above-mentioned photo-physical features make QDs suitable to be applied in different biomedical fields such as diagnosis, drug delivery, gene therapy, etc. [9,22].…”

Section: Physicochemical Properties Of Quantum Dotsmentioning

confidence: 99%

A Review of Clinical Applications of Graphene Quantum Dot-based Composites

Asadi

Chimeh

Hosseini

et al. 2019

jcc

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This review represents an overview of the graphene quantum dots (GQDs) synthesis and their applications as carriers or probes for the sensor, imaging, drug delivery, and diagnosing of diseases. Furthermore, recent developments in the GQDs for therapy and their potential toxicity for both in vitro and in vivo are reviewed. The recent findings and issues for GQDs and their composites with respect to stability and optimal size and toxicity at various applications are presented.

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Multicolor emissive carbon dot with solvatochromic behavior across the entire visible spectrum

Cited by 67 publications

References 47 publications

Environment‐Sensitive Carbon Dots Derived from Naphthalenediol for Solvent Polarity Indicator and Anti‐Counterfeiting

Environment‐Sensitive Carbon Dots Derived from Naphthalenediol for Solvent Polarity Indicator and Anti‐Counterfeiting

Fluorescent Carbon Dots for Sensitive and Rapid Monitoring of Intracellular Ferrous Ion

A Review of Clinical Applications of Graphene Quantum Dot-based Composites

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