Highly luminescent N, S- Co-doped carbon dots and their direct use as mercury(II) sensor

Wang, Yu; Kim, Sung-Hoon; Feng, Liang

doi:10.1016/j.aca.2015.07.051

Cited by 157 publications

(57 citation statements)

References 57 publications

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“…When the absorption spectrum of the quencher overlaps with the fluorescence excitation or emission spectra of the fluorescence substance, the fluorescence of the fluorescence substance will be effectively quenched due to the excitation and emission light of the fluorescence substance absorbed by the quencher, this phenomenon is named as the inner filter effect (IFE) . In order to understand the fluorescence quenching mechanism between BNCDs and curcumin, the UV–vis absorption measurements, the fluorescence spectra and lifetimes of BNCDs in the presence or absence of curcumin and the effect of temperature were investigated.…”

Section: Resultsmentioning

confidence: 99%

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Bian

Wang

et al. 2017

Luminescence

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In this present study, a fluorescent probe was developed to detect curcumin, which is derived from the rhizomes of the turmeric. We used a simple and economical way to synthesize boron and nitrogen co-doped carbon dots (BNCDs) by microwave heating. The maximum emission wavelength of the BNCDs was 450 nm at an excitation wavelength of 360 nm. The as-prepared BNCDs were characterized by multiple analytical techniques such as transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and infrared spectroscopy. Curcumin is a biologically active constituent of turmeric [1] which exhibits some biological and pharmacological activities such as antiinflammatory, [2] anti-ischemic, [3] antibacterial, [4] hepatoprotective, [5] anticarcinogenic, [6] and anti-dyspeptic [7] properties. It has also been reported that curcumin resists the formation of free radicals effectively such as superoxide radicals and hydroxyl radicals in blood and body tissues. [8,9] Due to the widespread application of curcumin in pharmacology and clinical medicine, much attention has been paid by researchers. Therefore, many methods for the detection of curcumin have been developed, including capillary electrophoresis, [10] high-performance thin-layer chromatographic, [11] high-performance liquid chromatography, [12,13] voltammetry, [14] liquid-liquid microextraction, [15] liquid chromatography-mass spectrometry, [16,17] and electrochemical techniques. [18] However, the majority of these Abbreviations used: BNCD, boron and nitrogen co-doped carbon dot; BSA, bovine serum albumin; CD, carbon dot; IFE, inner filter effect; PBS, phosphatebuffered solution; IR, infra-red; QY, quantum yield; TEM, transmission electron microscopy; UV, ultraviolet; XPS, X-ray photoelectron spectroscopy; XRD, X-ray diffraction.

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Section: Resultsmentioning

confidence: 99%

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Bian

Wang

et al. 2017

Luminescence

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“…From the UV-vis absorption spectrum of figure 4(a), one peak can be seen at 290 nm, which is ascribed to the typical absorption for n-π * transition of C=O or N=O in sp 3 hybrid regions [27,28]. The inset in figure 4(a) shows the optical photos of the N-doped CDs under daylight and UV light (365 nm, center).…”

Section: Preparation and Characterization Of N-doped Cdsmentioning

confidence: 99%

Rapid solid-phase microwave synthesis of highly photoluminescent nitrogen-doped carbon dots for Fe³⁺detection and cellular bioimaging

Xu²,

Shu³

et al. 2016

Nanotechnology

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Recently, carbon dots (CDs) have been playing an increasingly important role in industrial production and biomedical field because of their excellent properties. As such, finding an efficient method to quickly synthesize a large scale of relatively high purity CDs is of great interest. Herein, a facile and novel microwave method has been applied to prepare nitrogen doped CDs (N-doped CDs) within 8 min using L-glutamic acid as the sole reaction precursor in the solid phase condition. The as-prepared N-doped CDs with an average size of 1.64 nm are well dispersed in aqueous solution. The photoluminescence of N-doped CDs is pH-sensitive and excitation-dependent. The N-doped CDs show a strong blue fluorescence with relatively high fluorescent quantum yield of 41.2%, which remains stable even under high ionic strength. Since the surface is rich in oxygen-containing functional groups, N-doped CDs can be applied to selectively detect Fe(3+) with the limit of detection of 10(-5) M. In addition, they are also used for cellular bioimaging because of their high fluorescent intensity and nearly zero cytotoxicity. The solid-phase microwave method seems to be an effective strategy to rapidly obtain high quality N-doped CDs and expands their applications in ion detection and cellular bioimaging.

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“…Moreover, the as-prepared CQDs have efficiently used in the intercellular Hg 2+ ions detection in triple negative breast cancer cells based on fluorescence quenching. In another investigation, Wang et al synthesized blue emitting N and S co-doped CQDs (with QY of 17.6%)by using citric acid and rubeanic acid (i.e., dithiooxamide) as C and N/S precursors through microwave-assisted hydrothermal process (800 W for 2.5 min) and directly using them as a sensor for mercury(II)/Hg 2+ ions [172]. It has been noted that the fluorescence of these CQDs is almost quenched after adding 20 µM Hg 2+ , where the LOD is calculated to be 0.18 µM.…”

Section: Mercury (Hg 2+ ) Ionsmentioning

confidence: 99%

Recent Advancements in Doped/Co-Doped Carbon Quantum Dots for Multi-Potential Applications

Kandasamy

2019

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Carbon quantum dots (CQDs)/carbon nanodots are a new class of fluorescent carbon nanomaterials having an approximate size in the range of 2–10 nm. The majority of the reported review articles have discussed about the development of the CQDs (via simple and cost-effective synthesis methods) for use in bio-imaging and chemical-/biological-sensing applications. However, there is a severe lack of consolidated studies on the recently developed CQDs (especially doped/co-doped) that are utilized in different areas of application. Hence, in this review, we have extensively discussed about the recent development in doped and co-doped CQDs (using elements/heteroatoms—e.g., boron (B), fluorine (F), nitrogen (N), sulphur (S), and phosphorous (P)), along with their synthesis method, reaction conditions, and/or quantum yield (QY), and their emerging multi-potential applications including electrical/electronics (such as light emitting diode (LED) and solar cells), fluorescent ink for anti-counterfeiting, optical sensors (for detection of metal ions, drugs, and pesticides/fungicides), gene delivery, and temperature probing.

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Highly luminescent N, S- Co-doped carbon dots and their direct use as mercury(II) sensor

Cited by 157 publications

References 57 publications

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Rapid solid-phase microwave synthesis of highly photoluminescent nitrogen-doped carbon dots for Fe³⁺detection and cellular bioimaging

Recent Advancements in Doped/Co-Doped Carbon Quantum Dots for Multi-Potential Applications

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Highly luminescent N, S- Co-doped carbon dots and their direct use as mercury(II) sensor

Cited by 157 publications

References 57 publications

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Boron and nitrogen co‐doped carbon dots as a sensitive fluorescent probe for the detection of curcumin

Rapid solid-phase microwave synthesis of highly photoluminescent nitrogen-doped carbon dots for Fe3+detection and cellular bioimaging

Recent Advancements in Doped/Co-Doped Carbon Quantum Dots for Multi-Potential Applications

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Rapid solid-phase microwave synthesis of highly photoluminescent nitrogen-doped carbon dots for Fe³⁺detection and cellular bioimaging