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- W4311188511 abstract "Proton transfer reaction mass spectrometry has a so far little exploited potential for the analysis of high-purity process and inert gases. In order to protonate impurities like saturated hydrocarbons, precursor ions with very low proton affinity must be used, which in turn leads to a large energy release upon protonation of molecules with high proton affinity, potentially causing fragmentation of the product ions. To explore the potential of low-proton affinity precursor ions like ArH+ and N2H+ for analytical purposes, we studied their gas-phase reactions and kinetics with acetone by Fourier transform ion cyclotron resonance (FT–ICR) mass spectrometry. The dominant product ion in both cases is protonated acetone, but fragment ions formed include C2H3O+, C3H5+ and CH3O+, which are formed in higher abundance with ArH+ compared to N2H+. The reaction efficiencies are determined to be close to 100%. Quantum chemical calculations reveal energetically favorable reaction pathways and explain the loss of water leading to the formation of C3H5+, as well as loss of methane to yield C2H3O+ via dissociative proton attachment, which corresponds to the main product in the EI mass spectrum of acetone. Formation of protonated formaldehyde CH3O+ involves rearrangement of the C–C bonds to eliminate ethylene." @default.
- W4311188511 created "2022-12-24" @default.
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- W4311188511 date "2022-12-12" @default.
- W4311188511 modified "2023-09-25" @default.
- W4311188511 title "Energy release and product ion fragmentation in proton transfer reactions of N<sub>2</sub>H<sup>+</sup> and ArH<sup>+</sup> with acetone*" @default.
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- W4311188511 doi "https://doi.org/10.1080/00268976.2022.2155259" @default.
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