Journal ArticleDOI
Pulsed spectrometer for nuclear quadrupole resonance for remote detection of nitrogen in explosives
TLDR
In this article, a pulsed spectrometer for detection of nuclear quadrupole resonance on the nuclei of nitrogen N-14 with fast Fourier transform was described, and the time of detection was 81 s.Abstract:
We describe a pulsed spectrometer for detection of nuclear quadrupole resonance on the nuclei of nitrogen N-14 with fast Fourier transform. The use of a multipulse sequence, four channel system for data registration and processing permits detection of the nuclear quadrupole resonance (NQR) signal in the presence of strong interference and the piezo effect. Using this spectrometer we registered the NQR signal from an explosive sample of 150 g (92% RDX) at a distance of 22 cm, and the time of detection was 81 s.read more
Citations
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Journal ArticleDOI
Polymer sensors for nitroaromatic explosives detection
Sarah J. Toal,William C. Trogler +1 more
TL;DR: Several polymers have been used to detect nitroaromatic explosives by a variety of transduction schemes as mentioned in this paper, which relies on both electronic and structural interactions between the sensing material and the analyte.
Journal ArticleDOI
Detection of nitroaromatic explosives based on photoluminescent polymers containing metalloles.
TL;DR: Fluorescence spectra of polymetalloles or metallole-silane copolymers obtained in either toluene solutions or thin polymer films displayed no shift in the maximum of the emission wavelength, which suggests that the polymetaloles or meetalloles-silanes exhibit neither pi-stacking of polymer chains nor excimer formation.
Journal ArticleDOI
Modification of Extended Open Frameworks with Fluorescent Tags for Sensing Explosives: Competition between Size Selectivity and Electron Deficiency
TL;DR: Three new electron-rich metal-organic frameworks synthesized by employing ligands bearing aromatic tags have been successfully utilized for the detection of explosive nitroaromatic compounds (NACs) on the basis of fluorescence quenching.
Journal ArticleDOI
Metal–organic frameworks based luminescent materials for nitroaromatics sensing
TL;DR: In this paper, the authors summarize the progress in recent research in NACs sensing based on LMOFs cataloged by sensing techniques in the past three years, and then they describe the sensing applications for nano-MOF type materials and MOF film, together with MOF films applications.
Journal ArticleDOI
Fluorescence and visual sensing of nitroaromatic explosives using electron rich discrete fluorophores
TL;DR: In this article, several π-electron rich fluorescent aromatic compounds containing trimethylsilylethynyl functionality have been synthesized by employing Sonogashira coupling reaction and they were characterized fully by NMR (1H, 13C)/IR spectroscopy.
References
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Principles of nuclear magnetic resonance in one and two dimensions
TL;DR: In this paper, the dynamics of nuclear spin systems were studied by two-dimensional exchange spectroscopy and nuclear magnetic resonance imaging (NEMI) imaging, and two different correlation methods based on coherence transfer were proposed.
Journal ArticleDOI
Steady-state free precession in nuclear magnetic resonance
TL;DR: In this paper, a steady-state free precession technique for observing nuclear magnetic resonance is described, and a mathematical analysis is presented for certain special conditions, and initial experiments verifying the results of this analysis are reported.
Proceedings ArticleDOI
Narcotics and explosives detection by 14 N pure nuclear quadrupole resonance
TL;DR: In this paper, a proof-of-concept pure nuclear quadrupole resonance (NQR) detector for detecting explosives such as RDX and contraband narcotics such as cocaine and heroin is presented.