“Receptor free” inner filter effect based universal sensors for nitroexplosive picric acid using two polyfluorene derivatives in the solution and solid states

The Analyst ◽  
2019 ◽  
Vol 144 (2) ◽  
pp. 669-676 ◽  
Author(s):  
Arvin Sain Tanwar ◽  
Sourabh Patidar ◽  
Saurabh Ahirwar ◽  
Sourav Dehingia ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Limit Of Detection ◽  
Picric Acid ◽  
Inner Filter Effect ◽  
Solid States ◽  
Effect Mechanism ◽  
Filter Effect ◽  
Fluorescent Polymers ◽  
Polyfluorene Derivatives

“Receptor free” and “interaction free” detection of nitroexplosive PA at remarkably low limit of detection (LOD) values of 110 nM and 219 nM using two new fluorescent polymers via the inner filter effect mechanism.

Inner filter effect based selective detection of picric acid in aqueous solution using green luminescent copper nanoclusters

2018 ◽  
Vol 42 (9) ◽  
pp. 7223-7229 ◽  
Author(s):  
Krishnamoorthy Shanmugaraj ◽  
S. Abraham John
Keyword(s):  
Aqueous Solution ◽  
Environmental Protection ◽  
Homeland Security ◽  
Picric Acid ◽  
Inner Filter Effect ◽  
Selective Detection ◽  
Copper Nanoclusters ◽  
Filter Effect

Designing superior probes to detect trace amounts of picric acid (PA) is of huge importance for homeland security and environmental protection.

scholarly journals A Fluorescence Inner-Filter Effect Based Sensing Platform for Turn-On Detection of Glutathione in Human Serum

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 228 ◽  
Author(s):  
Shurong Tang ◽  
Xiuhua You ◽  
Quanhui Fang ◽  
Xin Li ◽  
Guangwen Li ◽  
...  
Keyword(s):  
Human Serum ◽  
Limit Of Detection ◽  
Cost Effective ◽  
Inner Filter Effect ◽  
Disease Diagnosis ◽  
Fluorescent Properties ◽  
Serum Samples ◽  
Turn On ◽  
Filter Effect ◽  
Sensing Platform

A novel turn-on fluorescence assay was developed for the rapid detection of glutathione (GSH) based on the inner-filter effect (IFE) and redox reaction. Molybdenum disulfide quantum dots (MoS2 QDs), which have stable fluorescent properties, were synthesized with hydrothermal method. Manganese dioxide nanosheets (MnO2 NSs) were prepared by exfoliating the bulk δ-MnO2 material in bovine serum albumin (BSA) aqueous solution. The morphology structures of the prepared nanoparticles were characterized by transmission electron microscope (TEM). Studies have shown that the fluorescence of MoS2 QDs could be quenched in the presence of MnO2 NSs as a result of the IFE, and is recovered after the addition of GSH to dissolve the MnO2 NSs. The fluorescence intensity showed a good linear relationship with the GSH concentration in the range 20–2500 μM, the limit of detection was 1.0 μM. The detection method was applied to the analysis of GSH in human serum samples. This simple, rapid, and cost-effective method has great potential in analyzing GSH and in disease diagnosis.

Inner Filter Effect Based Selective Detection of Nitroexplosive-Picric Acid in Aqueous Solution and Solid Support Using Conjugated Polymer

ACS Sensors ◽  
2016 ◽  
Vol 1 (8) ◽  
pp. 1070-1077 ◽  
Author(s):  
Arvin Sain Tanwar ◽  
Sameer Hussain ◽  
Akhtar Hussain Malik ◽  
Mohammad Adil Afroz ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Aqueous Solution ◽  
Conjugated Polymer ◽  
Picric Acid ◽  
Inner Filter Effect ◽  
Solid Support ◽  
Selective Detection ◽  
Filter Effect

scholarly journals Highly Luminescent and Biocompatible P and N Co-Doped Passivated Carbon Nanodots for the Sensitive and Selective Determination of Rifampicin Using the Inner Filter Effect

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2275 ◽  
Author(s):  
Baraa Al-Hashimi ◽  
Heshu Sulaiman Rahman ◽  
Khalid Mohammad Omer
Keyword(s):  
Limit Of Detection ◽  
Low Cost ◽  
Fluorescence Emission ◽  
Inner Filter Effect ◽  
Single Step ◽  
Carbon Nanodots ◽  
Pharmaceutical Dosage Forms ◽  
Selective Determination ◽  
Filter Effect

The determination of rifampicin in pharmaceutical dosage forms using a rapid, sensitive, selective, biocompatible, and low-cost method is of vital importance in the pharmaceutical analysis field to ensure its concentration is within the effective range when administered. In this study, nitrogen-and-phosphorous-doped carbon nanodots (CNDs) were prepared using a single-step hydrothermal method with ciprofloxacin as the starting material. The CNDs showed a highly intense blue fluorescence emission centered at 450 nm, with a photoluminescence quantum yield of about 51%. Since the absorption of rifampicin was the same as the excitation spectrum of CNDs, inner filter effect (IFE) quenching occurred and it was used as a successful detection platform for the analysis of rifampicin in capsules. The detection platform showed a dynamic linear range from 1 to 100 μM (R2 = 0.9940) and the limit of detection was 0.06 μM (when S/N = 3). The average spike recovery percentage for rifampicin in the capsule samples was 100.53% (n = 5). Moreover, the sub-chronic cytotoxicity of CNDs was evaluated on healthy male mice (Balb/c) drenched with different amounts of CNDs (10 and 50 mg/kg). During this study period, no mortalities or toxicity signs were recorded in any of the experimental subjects. Based on the cytotoxicity experiment, the proposed nano-probe is considered safe and biocompatible.

Copper nanoclusters with strong fluorescence emission as a sensing platform for sensitive and selective detection of picric acid

2018 ◽  
Vol 10 (35) ◽  
pp. 4251-4256 ◽  
Author(s):  
Wen Jie Zhang ◽  
Shi Gang Liu ◽  
Lei Han ◽  
Yu Ling ◽  
Liu Li Liao ◽  
...  
Keyword(s):  
Molecular Interactions ◽  
Picric Acid ◽  
Fluorescence Emission ◽  
Inner Filter Effect ◽  
Combined Effect ◽  
Selective Detection ◽  
Strong Fluorescence ◽  
Copper Nanoclusters ◽  
Filter Effect ◽  
Sensing Platform

The detection of picric acid has been developed based on a combined effect of molecular interactions and inner filter effect.

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.

Dual channel ion imprinted fluorescent polymers for dual mode simultaneous chromium speciation analysis

The Analyst ◽  
2020 ◽  
Vol 145 (7) ◽  
pp. 2661-2668
Author(s):  
Hongzhi Lu ◽  
Shoufang Xu
Keyword(s):  
Electron Transfer ◽  
Inner Filter Effect ◽  
Speciation Analysis ◽  
Core Shell ◽  
Chromium Speciation ◽  
Dual Mode ◽  
Dual Channel ◽  
Filter Effect ◽  
Ion Imprinted ◽  
Fluorescent Polymers

We report core shell structured ion imprinted fluorescent polymers structure for blue and red dual channel simultaneous chromium speciation analysis based on the inner filter effect and electron transfer dual mode.

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