Batteries

Ashbrook, Peter C.; Houts, Todd A.

doi:10.1016/s1074-9098(01)00293-3

Cited by 10 publications

(11 citation statements)

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“…31 (09) programme. corresponding solvents from initial stock solution either in chloroform (6,7) or in DMA (8,9). For contact mode detection of PA, 0.1mM solution of the corresponding compound was prepared.…”

Section: Synthesis Ofmentioning

confidence: 99%

“…In addition, because it is highly water soluble, PA is a major contaminate of groundwater. It is widely used in the dye industry, rocket fuel manufacturing, and the pharmaceutical industry. , Intake of PA causes skin and eye irritation, liver malfunction, and chronic diseases like anemia, cancer, and cyanosis. − Thus, for social and environmental safety, effective monitoring and detection of trace amounts of PA, both in solution and vapor phase, is quite important. , …”

Section: Introductionmentioning

confidence: 99%

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Electron-Rich Triphenylamine-Based Sensors for Picric Acid Detection

2015

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This paper demonstrates the role of solvent in selectivity and sensitivity of a series of electron-rich compounds for the detection of trace amounts of picric acid. Two new electron-rich fluorescent esters (6, 7) containing a triphenylamine backbone as well as their analogous carboxylic acids (8, 9) have been synthesized and characterized. Fluorescent triphenylamine coupled with an ethynyl moiety constitutes π-electron-rich selective and sensitive probes for electron-deficient picric acid (PA). In solution, the high sensitivity of all the sensors toward PA can be attributed to a combined effect of the ground-state charge-transfer complex formation and resonance energy transfer between the sensor and analyte. The acids 8 and 9 also showed enhanced sensitivity for nitroaromatics in the solid state, and their enhanced sensitivity could be attributed to exciton migration due to close proximity of the neighboring acid molecules, as evident from the X-ray diffraction study. The compounds were found to be quite sensitive for the detection of trace amount of nitroaromatics in solution, solid, and contact mode.

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Section: Synthesis Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron-Rich Triphenylamine-Based Sensors for Picric Acid Detection

2015

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“…In the family of PNACs, PA as a strong organic acid (p K a =0.38) was widely used as an explosive until World War I . In addition, PA has also found importance in dye industries, pharmaceuticals, and chemical laboratories . However, PA is a health hazard: it is a strong irritant to skin/eyes and causes prospective damage to organs involved in the respiratory system and the liver when it comes in contact with the human body .…”

Section: Introductionmentioning

confidence: 99%

Charge‐Transfer‐Induced Fluorescence Quenching of Anthracene Derivatives and Selective Detection of Picric Acid

Santra

Bera

Sukul

et al. 2016

Chemistry A European J

114

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2,6-Divinylpyridine-appended anthracene derivatives flanked by two alkyl chains at the 9,10-position of the core have been designed, synthesized, and characterized by NMR, MALDI-TOF, FTIR, and single-crystal XRD. These anthracene derivatives are able to recognize picric acid (2,4,6-trinitrophenol, PA) selectively down to parts per billion (ppb) level in aqueous as well as nonaqueous medium. Fluorescence emission of these derivatives in solution is significantly quenched by adding trace amounts of PA, even in the presence of other competing analogues, such as 2,4-dinitrophenol (2,4-DNP), 4-nitrophenol (NP), nitrobenzene (NB), benzoic acid (BA), and phenol (PH). The high sensitivity of these derivatives toward PA is considered as a combined effect of the proton-induced intramolecular charge transfer (ICT) as well as electron transfer from the electron-rich anthracene to the electron-deficient PA. Moreover, visual detection of PA has been successfully demonstrated in the solid state by using different substrates.

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“…Hence, there is a greater chance of contamination of ground water by PA from different sources, because of its high solubility in water. Intake of PA causes eye irritation, dizziness, nausea, skin allergy, and damage to liver and kidney . Thus, it is very important to effectively monitor and detect PA for social and environmental safety.…”

Section: Introductionmentioning

confidence: 99%

Triarylamine‐Cored Dendritic Molecular Gel for Efficient Colorometric, Fluorometric, and Impedometeric Detection of Picric Acid

Mondal

Bairi

Das

et al. 2018

Chemistry A European J

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Detection of nitroaromatics at ultralow concentration is a major security concern in defense, forensics, and environmental science. To this end, a new triarylamine-cored dendritic gelator (OGR) was synthesized, which produced thermoreversible, thixotropic, and fluorescent gels in n-octanol. On gelation, both π-π* transitions and the emission peak of the gelator show redshifts with a 4.5-fold increase of fluorescence intensity in the gel state indicating J-aggregation. The nitrogen lone-pair electrons of OGR make it a donor, and electron transfer occurs to acceptor nitroaromatics causing fluorescence quenching, which is further promoted due to its acidity. The Stern-Volmer rate constants measured for different nitroaromatics showed that it senses picric acid (PA) best. The contact-mode technique with OGR-treated paper strips can allow naked-eye detection of PA under UV light down to 10 m concentration within 30 s. Reusability of the gel is achieved by treating OGR@PA with NaOH solution. Impedance spectroscopic results indicated a decrease of both charge-transport resistance and Warburg impedance on successive addition of PA. The limits of detection of PA determined from fluorescence and impedance measurements match well. Thus, the OGR gel is a reusable, low-cost, specific sensor for PA by naked-eye colorimetric, fluorescence, and impedance techniques.

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Batteries

Cited by 10 publications

References 0 publications

Electron-Rich Triphenylamine-Based Sensors for Picric Acid Detection

Electron-Rich Triphenylamine-Based Sensors for Picric Acid Detection

Charge‐Transfer‐Induced Fluorescence Quenching of Anthracene Derivatives and Selective Detection of Picric Acid

Triarylamine‐Cored Dendritic Molecular Gel for Efficient Colorometric, Fluorometric, and Impedometeric Detection of Picric Acid

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