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Showing 1 to 17 of 17 for “"dimethyl methylphosphonate"”.
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Hafnium Dioxide Nanoparticle Thin Film Morphology and Reactivity with Dimethyl Methylphosphonate
… Once characterized, they are exposed to dimethyl methylphosphonate and the surface reaction is analyzed by reflection-absorption infrared spectroscopy.
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Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
… and civilian populations alike. The sorption of dimethyl methylphosphonate (DMMP), a CWA simulant, into trisilanolphenyl-POSS (TPP) films has previously been characterized with reflection absorption infrared spectroscopy, x-ray photoelectron spectroscopy, and uptake coefficient determinations …
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Design and Construction of a High Vacuum Surface Analysis Instrument to Study Chemistry at Nanoparticulate Surfaces
… interactions between the CWA simulant dimethyl methylphosphonate (DMMP) and nanoparticulate silicon dioxide.
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Ion mobility and mass spectrometric investigations of organophosphates related to chemical warfare agents and pesticides
… produced in the IMS. For the organophosphates dimethyl methylphosphonate, diethyl methylphosphonate and diisopropyl methylphosphonate, two ion mobility peaks were observed, which are shown to be the ammoniated monomer and ammoniated dimer ions. Using an ElectroSpray Ionisation (ESI) - ITMS, the …
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Towards the Design of Carnitine Acyltransferase Inhibitors: Modeling the Conformational Behavior of (<em>R</em>)-Carnitine, (<em>R</em>)-Acetylcarnitine, Morpholinium rings, and 2-Oxo-1,3,6-dioxazaphosphacinium rings
… The conformational behavior of several 4,4-dimethylmorpholinium rings and 4,4-dimethyl-2-oxo-1,3,6-dioxazaphosphacinium rings was examined by molecular mechanics (AMBER* and AMBER*-GB/SA). The contrast between the behavior of these heterocycles and that of the parent saturated hydrocarbon …
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The Study of Zirconium Hydroxide and Zirconium (IV) Metal-Organic Frameworks as Reactive Substrates for the Decomposition of Chemical Warfare Agents
… of the gas phase nerve agent simulant dimethyl methylphosphonate, DMMP. This investigation was carried out using two different methods: 1) with the use of Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) to examine the surface reaction between DMMP and the solid; and …
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Metal Oxide Nanoparticles: Optical Properties and Interaction with Chemical Warfare Agent Simulants
… the chemistry of the chemical warfare agent dimethyl methylphosphonate (DMMP) on yttrium oxide as well as other metal oxide nanoparticles. DMMP was found to dissociate at room temperature on several types of metal oxide nanoparticles. Hydroxyl groups were found to be critical for the …
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Investigation of Closed-Loop Control of Polyatomic Molecules
… the fragmentation of methyl/methoxy groups in dimethyl methylphosphonate (DMMP), a simulant for nerve agent Sarin. The exploitation of the sensitivity of molecular fragmentation to laser pulse shapes represents a new way to discriminate molecular identity. Here we have shown manipulation of the …
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Computational Investigations at the Gas-Surface Interface: Organic Surface Oxidation and Hydrolysis of Chemical Warfare Agents and Simulants
… We report similar mechanisms for the simulants dimethyl methylphosphonate and dimethyl chlorophosphate, though the latter may serve as a better simulant in studies of this type. Finally, an investigation of Sarin hydrolysis with solvated Cs8Nb6O19 shows an increase in the rate-limiting barrier …
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Layer-by-layer carbon nanotube electrodes for flexible chemical sensor and energy storage applications
… real-time detection of a nerve agent simulant (dimethyl methylphosphonate (DMMP)). Available functional groups (-NH2 and -COOH) on the MWNT films offer a direct route for covalently attaching a receptor of interest to the MWNTs, in order to tailor the chemical specificity in a modular fashion. …
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Volatile Organic Compound Detection And Disease Diagnostics Using Dna-Functionalized Carbon Nanotube Sensor Arrays
… using mixtures of 2,6-dinitrotoluene (DNT) and dimethyl methylphosphonate (DMMP) to simulate complex VOC environments. The sensors demonstrated sensitivity to parts-per-billion concentrations of DNT in a highly concentrated background of DMMP. Moreover, the shelf life of these sensors was …
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A study of various nucleophiles in aromatic SRN1 reactions
… irradiation, the carbanions of 2-benzyl-4,4-dimethyl-2-oxazoline, ethyl phenylacetate, t-butyl acetate, N,N-dimethylacetamide and dimethyl methylphosphonate underwent reactions with both 2-bromopyridine and iodobenzene in an S<sub>R</sub><sub>N</sub>1 manner to give yields of good …
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Ultrahigh Vacuum Studies of the Fundamental Interactions of Chemical Warfare Agents and Their Simulants with Amorphous Silica
… series, the simulants diisopropyl methylphosphonate (DIMP), dimethyl methylphosphonate (DMMP), trimethyl phosphate (TMP), dimethyl chlorophosphate (DMCP), and methyl dichlorophosphate (MDCP) were all observed to interact with the silica surface through the formation of a hydrogen …
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Polymer and covalent functionalization of single walled carbon nanotubes for electronic sensor applications
… enhances sensitivity to a nerve agent mimic, dimethyl methylphosphonate, in both nitrogen and air environments to concentrations as low as 5 ppm and 11 ppm, respectively. Additionally, these PEDOT/SWCNT derivative sensor systems experience negligible device performance over the course of two …
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Fabrication of electrospun TiO2/polymer composite nanofibers for photocatalysis and degradation of toxins
… of 2- chloro ethyl ethylsulfide (CEES) and dimethyl methylphosphonate (DMMP) and were found to exhibit enhanced rates of degradation. It was seen that saturation of the TiO2 nanofibers with water prior to exposure with CEES showed an overall increased the degradation under UV irradiation. …
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Uptake and Reaction Mechanisms of CO, H2O, and the Nerve Agent Simulant, DMMP with Single Atom-Modified Zirconium-based Metal-Organic Frameworks
… MOF-808 (Cu@MOF-808) exposed to water and dimethyl methylphosphonate (DMMP), a sarin simulant, to ascertain the interactions of the included Cu single atoms with the reactants required for nerve agent hydrolysis. The Cu sites were first characterized by exposure of the MOF to the infrared …
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Interfacial Energy Transfer in Small Hydrocarbon Collisions with Organic Surfaces and the Decomposition of Chemical Warfare Agent Simulants within Metal-Organic Frameworks
… mechanism and kinetics of interactions between dimethyl methylphosphonate (DMMP) or dimethyl chlorophosphate (DMCP), key CWA simulants, and Zr6-based metal-organic frameworks (MOFs) have been investigated with in situ infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), powder …