On–Off–On Fluorescent Carbon Dot Nanosensor for Recognition of Chromium(VI) and Ascorbic Acid Based on the Inner Filter Effect

2013 ◽  
Vol 5 (24) ◽  
pp. 13242-13247 ◽  
Author(s):  
Min Zheng ◽  
Zhigang Xie ◽  
Dan Qu ◽  
Di Li ◽  
Peng Du ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Inner Filter Effect ◽  
Carbon Dot ◽  
Chromium Vi ◽  
Filter Effect ◽  
Fluorescent Carbon

scholarly journals An ultrasensitive colorimetric and fluorescence dual-readout assay for glutathione with a carbon dot–MnO2 nanosheet platform based on the inner filter effect

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 21137-21144
Author(s):  
Mengyuan He ◽  
Ning Shang ◽  
Bo Zheng ◽  
Gege Yue
Keyword(s):  
Human Body ◽  
Body Fluid ◽  
Inner Filter Effect ◽  
Carbon Dot ◽  
Filter Effect ◽  
Human Body Fluid ◽  
Mno2 Nanosheet

An ultrasensitive colorimetric and fluorescence dual-readout assay based on carbon dot–MnO2 nanosheets platform was developed for GSH detection in human body fluid samples.

Facile one-step synthesis of highly luminescent N-doped carbon dots as an efficient fluorescent probe for chromium(vi) detection based on the inner filter effect

2018 ◽  
Vol 42 (5) ◽  
pp. 3729-3735 ◽  
Author(s):  
Haitao Wang ◽  
Shan Liu ◽  
Yisha Xie ◽  
Jingran Bi ◽  
Yao Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Inner Filter Effect ◽  
Fluorescence Assay ◽  
Assay System ◽  
Label Free ◽  
Chromium Vi ◽  
Filter Effect ◽  
One Step ◽  
Doped Carbon Dots

Label-free fluorescence assay system is designed for Cr(iv) detection.

Bacterium-Derived Carbon Dots as a Novel “Turn-On-On-Off-On” Sensor for Cr(VI) and 4-Nitrophenol Detection Based on Inner Filter Effect Mechanism

NANO ◽  
2020 ◽  
Vol 15 (06) ◽  
pp. 2050074
Author(s):  
Suping Wang ◽  
Yujiao Tu ◽  
Kunhao Qin ◽  
Xiaotian Yuan ◽  
Wei Chen ◽  
...  
Keyword(s):  
Environmental Pollutants ◽  
Inner Filter Effect ◽  
Environmental Pollutant ◽  
Turn On ◽  
Chromium Vi ◽  
Filter Effect ◽  
Novel Approach ◽  
Fluorescence Nanoprobe ◽  
One Step ◽  
Sensitive Sensor

Phenolic compounds, especially 4-nitrophenol (4-NP), and chromium (VI) are highly toxic environmental pollutants. Thus, it is significantly important to establish a rapid and sensitive sensor for 4-NP and Cr(VI) monitoring in environment. In this paper, a novel approach has been adopted where E. coli-derived CDs (CDs-WT) prepared by one step hydrothermal method previously and sensitized by ampicillin (turn-on) were used as fluorescence nanoprobe (CDs-WT-Amp) for 4-NP and Cr(VI) determination based on the inner filter effect quenching mechanism (turn-off). Then, the quenching fluorescence was reversed by addition of ampicillin (turn-on). The linear ranges of 4-NP and Cr(VI) detection were 0–50[Formula: see text][Formula: see text]M and 0–25[Formula: see text][Formula: see text]M, with the limits of detection 88.89[Formula: see text]nM and 64.75[Formula: see text]nM, respectively. The “turn-on-on-off-on” fluorescent nanosensor system was successfully used to determine Cr(VI) and 4-NP in water with satisfactory results. It shows that the “turn-on-off-on” nanoprobe has great promising potential for application to environmental pollutant detection.

An inner filter effect based Schiff base chemosensor for recognition of Cr(vi) and ascorbic acid in water matrices

2018 ◽  
Vol 42 (1) ◽  
pp. 293-300 ◽  
Author(s):  
Ambreen Abbasi ◽  
Mohammad Shakir
Keyword(s):  
Ascorbic Acid ◽  
Schiff Base ◽  
Inner Filter Effect ◽  
Fluorescent Sensing ◽  
Filter Effect

An effective and simple fluorescent sensing approach for recognition of Cr(vi) using a Schiff base chemosensor,N′-[(E)-(3,4-dimethoxyphenyl) methylidene] furan-2-carbohydrazide, was developed.

scholarly journals “Turn on” Fluorescence Sensor of Glutathione Based on Inner Filter Effect of Co-Doped Carbon Dot/Gold Nanoparticle Composites

2021 ◽  
Vol 23 (1) ◽  
pp. 190
Author(s):  
Thi-Hoa Le ◽  
Ji-Hyeon Kim ◽  
Sang-Joon Park
Keyword(s):  
Gold Nanoparticle ◽  
Fluorescence Intensity ◽  
Limit Of Detection ◽  
Inner Filter Effect ◽  
Fluorescence Sensor ◽  
Fluorescence Emission Spectrum ◽  
Nitrogen And Phosphorus ◽  
Carbon Dot ◽  
Filter Effect ◽  
Co Doped

Glutathione (GSH) is a thiol that plays a significant role in nutrient metabolism, antioxidant defense and the regulation of cellular events. GSH deficiency is related to variety of diseases, so it is useful to develop novel approaches for GSH evaluation and detection. In this study we used nitrogen and phosphorus co-doped carbon dot-gold nanoparticle (NPCD–AuNP) composites to fabricate a simple and selective fluorescence sensor for GSH detection. We employed the reductant potential of the nitrogen and phosphorus co-doped carbon dots (NPCDs) themselves to form AuNPs, and subsequently NPCD–AuNP composites from Au3+. The composites were characterized by using a range of spectroscopic and electron microscopic techniques, including electrophoretic light scattering and X-ray diffraction. The overlap of the fluorescence emission spectrum of NPCDs and the absorption spectrum of AuNPs resulted in an effective inner filter effect (IFE) in the composite material, leading to a quenching of the fluorescence intensity. In the presence of GSH, the fluorescence intensity of the composite was recovered, which increased proportionally to increasing the GSH concentration. In addition, our GSH sensing method showed good selectivity and sensing potential in human serum with a limit of detection of 0.1 µM and acceptable results.

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