N-Carbamoylmaleimide-treated carbon dots: stabilizing the electrochemical intermediate and extending it for the ultrasensitive detection of organophosphate pesticides

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19390-19398 ◽  
Author(s):  
Jinjin Xu ◽  
Chaofan Yu ◽  
Tao Feng ◽  
Mingyue Liu ◽  
Fengting Li ◽  
...  
Keyword(s):  
Michael Addition ◽  
Carbon Dots ◽  
Ultrasensitive Detection ◽  
Organophosphate Pesticides ◽  
Treated Carbon ◽  
First Time

N-Carbamoylmaleimide-treated CDs are used for the sensing of by enriching the electrochemical intermediate through Michael addition for the first time.

Carbon dots derived from Fusobacterium nucleatum for intracellular determination of Fe3+ and bioimaging both in vitro and in vivo

2021 ◽  
Author(s):  
Lijuan Liu ◽  
Shengting Zhang ◽  
Xiaodan Zheng ◽  
Hongmei Li ◽  
Qi Chen ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fusobacterium Nucleatum ◽  
Living Cells ◽  
First Time ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Fusobacterium nucleatum has been employed for the first time to synthesize fluorescent carbon dots which could be applied for the determination of Fe3+ ions in living cells and bioimaging in vitro and in vivo with excellent biocompatibility.

Highly photoluminescent carbon dots-based immunosensors for ultrasensitive detection of aflatoxin M1 residues in milk

2021 ◽  
Vol 355 ◽  
pp. 129443
Author(s):  
Guangming Li ◽  
Chen Liu ◽  
Xingcai Zhang ◽  
Pengjie Luo ◽  
Guimiao Lin ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Aflatoxin M1 ◽  
Ultrasensitive Detection

Catalyst-Free One-Pot Synthesis of Novel Heteroarylamine Substituted Furo[3,2-c]coumarins

Synlett ◽  
2018 ◽  
Vol 29 (12) ◽  
pp. 1589-1592 ◽  
Author(s):  
Abolfazl Olyaei ◽  
Mahnaz Saraei ◽  
Reyhaneh Khoeiniha
Keyword(s):  
Michael Addition ◽  
Aldol Condensation ◽  
Ring Closure ◽  
Dehydration Reaction ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
Tandem Process ◽  
First Time

A high-yielding cyclocondensation of 4-hydroxycoumarin, phenylglyoxal monohydrate, and heteroarylamines proceeds without catalysis, which gives novel functionalized furo[3,2-c]coumarins and heteroarylamino alkylation of coumarin products in acetonitrile under reflux, is reported for the first time. This tandem process involves sequentially an aldol condensation, Michael addition, a ring closure, and dehydration reaction.

Light-driven self-powered biosensor for ultrasensitive organophosphate pesticide detection via integration of the conjugated polymer-sensitized CdS and enzyme inhibition strategy

2018 ◽  
Vol 6 (42) ◽  
pp. 6842-6847 ◽  
Author(s):  
Panpan Gai ◽  
Shuxia Zhang ◽  
Wen Yu ◽  
Haiyin Li ◽  
Feng Li
Keyword(s):  
Fuel Cell ◽  
Enzyme Inhibition ◽  
Conjugated Polymer ◽  
Ultrasensitive Detection ◽  
Organophosphate Pesticides ◽  
Organophosphate Pesticide ◽  
Pesticide Detection ◽  
Enzymatic Fuel Cell ◽  
Self Powered

A new light-driven self-powered biosensor based on a photoelectrochemical enzymatic fuel cell was proposed for the ultrasensitive detection of organophosphate pesticides.

scholarly journals N-doped carbon dots covalently functionalized with pillar[5]arenes for Fe3+ sensing

2019 ◽  
Vol 15 ◽  
pp. 1262-1267 ◽  
Author(s):  
Jia Gao ◽  
Ming-Xue Wu ◽  
Dihua Dai ◽  
Zhi Cai ◽  
Yue Wang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
High Selectivity ◽  
Chemical Sensor ◽  
Doped Carbon Dots ◽  
First Time

Fluorescent N-doped carbon dots (CN-dots) covalently functionalized with carboxylatopillar[5]arene (CP[5]), namely CCDs, have been prepared the first time. Compared with CN-dots without pillarene units, the newly constructed fluorescent CCDs could recognize Fe3+ with high selectivity. Therefore, such CCDs can potentially serve as a promising chemical sensor for Fe3+ ions.

scholarly journals Carbon dots as absorbance promoter probes for detection of Cu(ii) ions in aqueous solution: central composite design approach

2018 ◽  
Vol 17 (2) ◽  
pp. 245-255 ◽  
Author(s):  
S. A. R. Shahamirifard ◽  
M. Ghaedi ◽  
M. Montazerozohori ◽  
A. Masoudiasl
Keyword(s):  
Aqueous Solution ◽  
Central Composite Design ◽  
Carbon Dots ◽  
Design Approach ◽  
Complexing Agent ◽  
Vis Spectroscopy ◽  
First Time ◽  
Central Composite ◽  
Determination Of Copper

In this work, the use of carbon dots (CDs) as a complexing agent and sensitizer in a polymeric matrix for determination of copper(ii) by UV-vis spectroscopy is reported for the first time.

scholarly journals Ultrasensitive Detection of Severe Fever with Thrombocytopenia Syndrome Virus Based on Immunofluorescent Carbon Dots/SiO2 Nanosphere-Based Lateral Flow Assay

ACS Omega ◽  
2019 ◽  
Vol 4 (25) ◽  
pp. 21431-21438 ◽  
Author(s):  
Lai-Di Xu ◽  
Qing Zhang ◽  
Shou-Nian Ding ◽  
Jing-Juan Xu ◽  
Hong-Yuan Chen
Keyword(s):  
Carbon Dots ◽  
Lateral Flow ◽  
Lateral Flow Assay ◽  
Ultrasensitive Detection ◽  
Severe Fever

A highly sensitive signal-on biosensor for microRNA 142-3p based on the quenching of Ru(bpy)32+–TPA electrochemiluminescence by carbon dots and duplex specific nuclease-assisted target recycling amplification

2020 ◽  
Vol 56 (49) ◽  
pp. 6692-6695
Author(s):  
Jiao Yang ◽  
Qian Xia ◽  
Longhua Guo ◽  
Fang Luo ◽  
Yongqiang Dong ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Target Recycling ◽  
Highly Sensitive ◽  
Recycling Amplification ◽  
First Time

CDs have been used to quench the ECL of Ru(bpy)32+–TPA for the first time and a sensitive biosensor was developed.

scholarly journals Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 464 ◽  
Author(s):  
Sizhe Hu ◽  
Kai Jiang ◽  
Yuci Wang ◽  
Sui Wang ◽  
Zhongjun Li ◽  
...  
Keyword(s):  
Solid State ◽  
Visible Light ◽  
Carbon Dots ◽  
Short Wavelength ◽  
Room Temperature ◽  
Uv Light ◽  
Long Wavelength ◽  
Heating Treatment ◽  
First Time ◽  
Matrix Free

Carbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be triggered by ultraviolet (UV) light (below 400 nm), limiting their applications in certain fields. Herein, visible-light-excited matrix-free RTP CDs (named AA-CDs) with a long-wavelength (orange) emission are reported for the first time. The AA-CDs can be facilely prepared via a microwave heating treatment of L-aspartic acid (AA) in the presence of ammonia and they emit unique orange RTP in the solid state with visible light (420 nm) excitation just being switched off. Through the studies of the carbonization process, the C=O and C=N containing moieties in the AA-CDs are confirmed to be responsible for the observed RTP emission. Finally, the applications of AA-CDs in information encryption and anti-counterfeiting were preliminarily demonstrated.

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