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- W2897736707 abstract "The pyrolysis products resulting from the rapid laser heating of low concentrations of adsorbed chemical warfare simulants have been examined. Specifically, three GB simulants were reacted in this manner: dimethyl methylphosphonate (DMMP), diethyl ethyl phosphonate, and diisopropyl methylphosphonate (DIMP) as well as one HD simulant: 2-choroethyl ethyl sulfide (CEES). A cryogenically cooled and chemically inert sapphire surface, held in a vacuum chamber, was dosed with a molecular beam of the simulant, and a pulsed CO2 transversely excited atmospheric laser was used to induce rapid temperature jumps. The coverage of simulant attained between laser pulses was never more than 10%. The plume of reacted and desorbed gases was then analyzed by a combination of time-of-flight measurements and mass spectrometry. We were able to vary the apparent surface temperature between ∼600 and ∼2400 K. The least reactive simulant was CEES, where ∼70% was desorbed as the parent molecule without reaction. The branching ratio between reaction and desorption increased for increasing large R–O groups, with 10% of the DMMP unreacted at 2300 K, but almost all of the DIMP decomposed at ∼1200 K. These fundamental measurements on the pyrolysis chemistry of these four molecules shed new, quantitative insights into their thermal chemistry and likelihood of their decomposition when subjected to controlled rates of rapid heating to reach elevated temperatures." @default.
- W2897736707 created "2018-10-26" @default.
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- W2897736707 date "2018-10-17" @default.
- W2897736707 modified "2023-10-16" @default.
- W2897736707 title "Fate of Some Chemical Warfare Simulants Adsorbed on an Inert Surface when Exposed to Rapid Laser Initiated Heating" @default.
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- W2897736707 doi "https://doi.org/10.1021/acs.jpcc.8b06066" @default.
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