Ratiometric Fluorescent Sensor for Al 3+ Based on the Inner Filter and Static Quenching Effects of Carbon Dots Obtained from Neem Leaves

2021 ◽  
Vol 6 (12) ◽  
pp. 2966-2974
Author(s):  
Jiangyao Wu ◽  
Yudong Zhang ◽  
Yan Dong ◽  
Shumin Zhi ◽  
Xueyun Yang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Static Quenching ◽  
Neem Leaves

A green synthetic route for the surface-passivation of carbon dots as an effective multifunctional fluorescent sensor for the recognition and detection of toxic metal ions from aqueous solution

2019 ◽  
Vol 11 (4) ◽  
pp. 490-506 ◽  
Author(s):  
K. Radhakrishnan ◽  
P. Panneerselvam ◽  
M. Marieeswaran
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Carbon Dots ◽  
Surface Passivation ◽  
Fluorescent Sensor ◽  
Toxic Metal ◽  
Carbon Quantum Dots ◽  
Synthetic Route ◽  
One Pot ◽  
Hydrothermal Methods

In this work, a green synthetic route was used to create a number of surface passivated fluorescent carbon quantum dots, which are explored as promising sensing probes, via facile one-pot hydrothermal methods.

scholarly journals Spectrofluorimetric Determination of Hydrochlorothiazide by a Carbon Dots-Based Probe via Inner Filtering Effect and Resonance Rayleigh Scattering

2022 ◽  
Author(s):  
Ali Ghafarloo ◽  
Reza Sabzi ◽  
Naser Samadi ◽  
Hamed Hamishehkar
Keyword(s):  
Carbon Dots ◽  
Rayleigh Scattering ◽  
Limit Of Detection ◽  
Fluorescent Sensor ◽  
Emission Spectra ◽  
Cost Effective ◽  
Inner Filter Effect ◽  
Resonance Rayleigh Scattering ◽  
Excitation Spectra ◽  
One Pot

Synthesis of carbon dots (CDs) from natural resources not only enables green synthesis and production of environmentally friendly materials, but also provides a cost-effective probe as a fluorescence nanosensor. The proposed sensor introduces a unique one-pot hydrothermal CDs synthesis from alfalfa leaves, which is promising for sensing hydrochlorothiazide (HCTZ) via inner filter effect (IFE) and resonance Rayleigh scattering (RRS). The as-prepared CDs had wide emission spectra, excitation-dependent emission, high solubility, high stability, and visible fluorescence light with a quantum yield of up to 11%. The absorption of HCTZ overlapped with the excitation spectra of CDs. Therefore, CDs represented excellent quenching due to IFE when HCTZ was gradually added. Furthermore, this fluorescent sensor was successfully used to quantify HCTZ in the linear ranges (0.17-2.50 μg mL-1) with the limit of detection of 0.11 μg mL-1. The sensing system was simple as no surface functionalization was required for CDs, leading to less laborious steps and more cost-effective synthesis. The reaction time was short, i.e., less than 2 min, indicating a simple approach for rapid analysis of HCTZ. By optimizing conditions, successful measurements were carried out on pharmaceutical tablets.

Dual-emission carbon dots based ratiometric fluorescent sensor with opposite response for detecting copper (II)

2021 ◽  
Vol 196 ◽  
pp. 109803
Author(s):  
Gengli Huang ◽  
Xueli Luo ◽  
Xie He ◽  
Yong Han ◽  
Haiping Zhao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Dual Emission ◽  
Opposite Response

An ultra-sensitive “turn-off” fluorescent sensor for the trace detection of rifampicin based on glutathione-stabilized copper nanoclusters

The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1227-1235 ◽  
Author(s):  
Xiao-Man Wu ◽  
Jun-Hua Zhang ◽  
Zi-Shuo Feng ◽  
Wen-Xin Chen ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Inner Filter Effect ◽  
Static Quenching ◽  
Sensitive Detection ◽  
Trace Detection ◽  
Copper Nanoclusters ◽  
Filter Effect

A “turn-off” fluorescent sensor based on glutathione-stabilized copper nanoclusters (GSH-Cu NCs) was prepared for the sensitive detection of RFP via a static quenching strategy caused by the inner filter effect (IFE).

A reliable and facile fluorescent sensor from carbon dots for sensing 2,4,6-trinitrophenol based on inner filter effect

2020 ◽  
Vol 720 ◽  
pp. 137680 ◽  
Author(s):  
Xin Wang ◽  
Yongli Liu ◽  
Qingxiang Zhou ◽  
Xueying Sheng ◽  
Yi Sun ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Inner Filter Effect ◽  
Filter Effect

Microwave-assisted synthesis of nitrogen-rich carbon dots as effective fluorescent probes for sensitive detection of Ag+

2019 ◽  
Vol 3 (12) ◽  
pp. 2751-2758 ◽  
Author(s):  
Jie Feng ◽  
Xiaoran Zhao ◽  
Wei Bian ◽  
Xinjing Tang
Keyword(s):  
Fluorescent Probes ◽  
Carbon Dots ◽  
Static Quenching ◽  
Sensitive Detection ◽  
Microwave Assisted Synthesis ◽  
Quenching Effect ◽  
Microwave Assisted

Highly fluorescent N-dots are rationally designed and synthesized through microwave-assisted reaction of 2-azidoimidazole with glycerol crosslinker and are employed as an effective chemosensor for Ag+ analysis via the static quenching effect.

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