A smart ratiometric red fluorescent chemodosimeter for fluoride based on anthraquinone nosylate

2017 ◽  
Vol 41 (12) ◽  
pp. 5098-5104 ◽  
Author(s):  
Shweta Shweta ◽  
Ajit Kumar ◽  
Neeraj Neeraj ◽  
Sharad Kumar Asthana ◽  
K. K. Upadhyay
Keyword(s):  
Detection Limit ◽  
Specific Detection ◽  
Sensing Mechanism ◽  
Fluorescent Chemodosimeter

A smart ratiometric red fluorescent chemodosimeter (AH) has been explored for specific detection of F− with a lowest detection limit of 3.45 × 10−10 M. The sensing mechanism was worked out as fluoride-triggered deprotonation of imidazole accompanied by deprotection of the nosylate group.

A novel ratiometric AIE-based fluorescent probe for specific detection of Hcy/Cys and imaging of living cells in vivo

2021 ◽  
Author(s):  
Hong-Min Lv ◽  
Zi-Ke Jiang ◽  
Jing Wang ◽  
Tao Wang ◽  
Xiao-Nan Zhang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Condensation Reaction ◽  
Living Cells ◽  
Specific Detection ◽  
Sensing Mechanism

The sensing mechanism toward Hcy/Cys is realized based on the condensation reaction, which breaks CN to form a thiazolidine adduct.

Molecular diagnosis of natural fasciolosis by DNA detection in sheep faeces

2015 ◽  
Vol 60 (2) ◽  
Author(s):  
Silvana Carnevale ◽  
María Laura Pantano ◽  
Laura Kamenetzky ◽  
Jorge Bruno Malandrini ◽  
Claudia Cecilia Soria ◽  
...  
Keyword(s):  
Detection Limit ◽  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Molecular Diagnosis ◽  
Helminth Infection ◽  
Gastrointestinal Nematodes ◽  
Infected Sheep ◽  
Specific Detection ◽  
Pcr Assay ◽  
Stool Samples

AbstractFasciolosis is an important parasitic zoonosis considered the most important helminth infection of ruminants in tropical countries. The aim of this study was to develop a PCR assay for the sensitive and specific detection of F. hepatica in formalin preserved sheep faeces. A 405-bp fragment of the cytochrome c oxidase subunit 1 gene of F. hepatica was amplified from stool samples of infected sheep. The PCR assay showed a detection limit of 20 pg of F. hepatica DNA. No cross-reactions were observed with samples containing coccidian oocysts or gastrointestinal nematodes eggs. Our PCR technique showed to be effective for specific detection of F. hepatica infections in sheep.

A Colorimetric Aptamer Biosensor Based on Gold Nanoparticles for the Ultrasensitive and Specific Detection of Tetracycline in Milk

2013 ◽  
Vol 66 (4) ◽  
pp. 485 ◽  
Author(s):  
Lan He ◽  
Yanfang Luo ◽  
Wenting Zhi ◽  
Yuangen Wu ◽  
Pei Zhou
Keyword(s):  
Gold Nanoparticles ◽  
Detection Limit ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Colour Change ◽  
Raw Milk ◽  
Hexadecyltrimethylammonium Bromide ◽  
Specific Detection ◽  
Wide Range

This paper proposes a sensing strategy which employs an aptamer, unmodified gold nanoparticles (AuNP), and hexadecyltrimethylammonium bromide (CTAB) to detect tetracycline (TET) in raw milk. The method is based on the colorimetric assay of aggregating AuNP. In the absence of TET, the CTAB and aptamer form a complex which allows the aggregation of AuNP. In the presence of TET, the TET aptamer is exhausted first due to the formation of aptamer-TET complexes, which prevents assembly of the CTAB–aptamer supramolecule, causing a colour change and no aggregation of AuNP. This mechanism for the detection of TET proved to be sensitive and convenient. The colorimetric assay has a detection limit of 122 nM TET. This sensor has great potential for the sensitive, colorimetric detection of a wide range of molecular analytes.

An aggregation-induced emission based “turn-on” fluorescent chemodosimeter for the selective detection of Pb2+ ions

RSC Advances ◽  
2014 ◽  
Vol 4 (87) ◽  
pp. 47076-47080 ◽  
Author(s):  
Dipratn G. Khandare ◽  
Hrishikesh Joshi ◽  
Mainak Banerjee ◽  
Mahesh S. Majik ◽  
Amrita Chatterjee
Keyword(s):  
Detection Limit ◽  
Selective Detection ◽  
Aggregation Induced Emission ◽  
Turn On ◽  
Low Detection Limit ◽  
Fluorescent Chemodosimeter ◽  
Low Solubility

An aggregation-induced emission (AIE) based “turn-on” fluorescent chemodosimeter for selective detection of Pb2+ ions has been developed. The probe is a phosphate functionalized tetraphenylethylene derivative and the resulting lead–TPE complex has very low solubility in working solvent and triggers AIE and shows a low detection limit of 10 ppb.

A new chromo-fluorogenic probe based on BODIPY for NO2 detection in air

2015 ◽  
Vol 51 (9) ◽  
pp. 1725-1727 ◽  
Author(s):  
L. Alberto Juárez ◽  
Ana M. Costero ◽  
Margarita Parra ◽  
Salvador Gil ◽  
Félix Sancenón ◽  
...  
Keyword(s):  
Carbonyl Group ◽  
Target Molecule ◽  
Sensing Mechanism ◽  
Fluorogenic Probe ◽  
Fluorescent Chemodosimeter ◽  
No2 Detection

A new fluorescent chemodosimeter for detecting NO2 has been synthesized. The sensing mechanism is based on the regeneration of the carbonyl group induced by the target molecule. This reaction gives rise to both colorimetric and fluorescent changes. A LOD of 0.1 ppm has been determined.

Cationic polythiophene for specific detection of cyanide ions in water using fluorometric technique

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92564-92572 ◽  
Author(s):  
Radhakanta Ghosh ◽  
Sandip Das ◽  
Dhruba P. Chatterjee ◽  
Arun K. Nandi
Keyword(s):  
Detection Limit ◽  
High Sensitivity ◽  
Specific Detection ◽  
Low Detection Limit

A new fluorometric cyanide sensor using cationic polythiophene exhibits high sensitivity, selectivity with a low detection limit (4.4 ppb) in water.

A NIR rhodamine fluorescent chemodosimeter specific for glutathione: Knoevenagel condensation, detection of intracellular glutathione and living cell imaging

2018 ◽  
Vol 6 (12) ◽  
pp. 1791-1798 ◽  
Author(s):  
Lulu Tong ◽  
Ying Qian
Keyword(s):  
Detection Limit ◽  
Near Infrared ◽  
Cell Imaging ◽  
Knoevenagel Condensation ◽  
High Sensitivity ◽  
Conjugate Addition ◽  
Intracellular Glutathione ◽  
Living Cell Imaging ◽  
Fluorescent Chemodosimeter ◽  
Spirolactam Opening

A new near-infrared probe for detecting glutathione based on conjugate addition and intramolecular amino induced spirolactam opening named RhAN was designed and synthesized. Its emission intensity enhance more than 90-fold upon addition of GSH. In addition, it also has high sensitivity with low detection limit of 0.1 μM.

Simplified Cleanup and Capillary Gas Chromatographic Analysis of Residues of Aldicarb and Its Oxidation Products in Chrysanthemum Leaves

1986 ◽  
Vol 69 (5) ◽  
pp. 852-855 ◽  
Author(s):  
Brian D McGarvey ◽  
Mikio Chiba ◽  
A Bruce Broadbent
Keyword(s):  
Detection Limit ◽  
Chromatographic Analysis ◽  
Oxidation Products ◽  
Capillary Gc ◽  
Specific Detection ◽  
Gc Analysis ◽  
Gas Chromatographic Analysis ◽  
Splitless Injection ◽  
Simplified Method

Abstract An efficient simplified method for the extraction, cleanup, and capillary gas chromatographic (GC) analysis of residues of aldicarb, aldicarb sulfoxide, and aldicarb sulfone in chrysanthemum leaves is presented. Samples are extracted with methanol and cleaned up using columns consisting of 0.2 g Nuchar-Attaclay in disposable pipets. The 3 compounds are easily quantitated by capillary GC with splitless injection and thermionic-specific detection. Recovery of the 3 compounds at 2 levels from spiked leaves ranged from 74.3 to 90.9%. The detection limit of the GC analysis, with a 1 μL injection, is 0.01 μg/mL for aldicarb and aldicarb sulfone, and 0.06 p.g/mL for aldicarb sulfoxide.

A twisted intramolecular charge transfer probe for rapid and specific detection of trace biological SO2 derivatives and bio-imaging applications

2015 ◽  
Vol 51 (6) ◽  
pp. 1154-1156 ◽  
Author(s):  
Leiming Zhu ◽  
Junchao Xu ◽  
Zhe Sun ◽  
Boqiao Fu ◽  
Caiqin Qin ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Detection Limit ◽  
Intramolecular Charge Transfer ◽  
Fast Response ◽  
Ratiometric Fluorescence ◽  
Specific Detection ◽  
Twisted Intramolecular Charge Transfer ◽  
Fluorescence Response ◽  
Low Detection Limit ◽  
Bio Imaging

A highly “reactive” probe showed a ratiometric fluorescence response to HSO3− with fast response and low detection limit (3.0 nM).

scholarly journals The sensing mechanism of a flavone-based ESIPT fluorescent chemodosimeter for selective recognition towards fluoride: a theoretical

RSC Advances ◽  
2022 ◽  
Vol 12 (4) ◽  
pp. 2262-2269
Author(s):  
Ran Wei ◽  
Lifeng Jia ◽  
Xueli Jia ◽  
Hongsheng Zhai
Keyword(s):  
Selective Recognition ◽  
Sensing Mechanism ◽  
Fluorescent Chemodosimeter

The sensing mechanism of 3-hydroxyflavone-based (3-HF) fluorescent chemodosimeter 3-triisopropylsilylflavone (3-TPSF) for detecting fluoride (F−) has been theoretically investigated.

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