The energetics of the formation of positive ions produced by charge-stripping from negative ions

Szulejko, Jan E.; Bowie, John H.; Howe, Ian; Beynon, J. H.

doi:10.1016/0020-7381(80)85018-2

Cited by 48 publications

(16 citation statements)

References 12 publications

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“…Charge-reversal (CR) [44][45][46] and NR 47,48 spectra were measured using a two-sector reversed geometry VG ZAB 2HF spectrometer. This instrument and the typical experimental conditions of negative-ion chemical ionisation (NICI) have been described in detail elsewhere.…”

Section: Mass Spectrometric Methodsmentioning

confidence: 99%

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Dua

Bowie

Blanksby

1999

Eur. J. Mass Spectrom.

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Section: Mass Spectrometric Methodsmentioning

confidence: 99%

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Dua

Bowie

Blanksby

1999

Eur. J. Mass Spectrom.

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“…22,23 In the case of anion formation, the minimum energy is the sum of the IE of M and EA of M, less the EA of N. If the minimum energy required for the charge inversion is exceeded, subsequent fragmentation of product cations may be observed. Since the removal of two electrons is a vertical process, the newly formed positive ion initially retains the geometry of the negatively charged precursor ion.…”

Section: Reaction (12) Electron Transfermentioning

confidence: 99%

Charge permutation reactions in tandem mass spectrometry

McLuckey

2004

J. Mass Spectrom.

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Central to the tandem mass spectrometry experiment is the process that gives rise to product ions, i.e. the reaction intermediate to stages of mass analysis. Changes in mass or charge of the parent ion (or both) are generally readily detected by all forms of tandem mass spectrometry. Charge changing, or charge permutation, reactions have a long history in mass spectrometry. However, with the advent of new ionization methods, such as electrospray ionization, and the expansion of tandem mass spectrometry instrumentation to include ion trapping instruments, the past decade has seen a major increase in the types of charge permutation reactions that can be studied. Most charge permutation reactions involve electrons or protons as the charge mediating agents. This report, therefore, provides an overview of charge permutation reactions involving protons or electrons. Particular emphasis is placed on processes that involve interactions of precursor ions with gaseous neutral species, electrons or oppositely charged ions. Charge permutation reactions involving electron gain/loss are described first according to a rough order of the energy required for the reaction beginning with the most endoergic reactions and ending with the most exoergic reactions. An analogous approach is then taken with charge permutation reactions involving proton gain/loss. Important charge permutation reactions discussed herein, among others, include those referred to as charge inversion, charge stripping, electron capture dissociation, collision-induced ionization and charge separation. These reaction types, and others described herein, are the subjects of active research and are also finding use in many current areas of application.

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“…This corresponds to an average of 1.1–1.2 collisions per ion 36. Product anions resulting from CID processes were recorded by scanning E. The − CR + spectrum37–39 was recorded using single collision conditions in collision cell 1 (O 2 , 80% transmission of main beam). Neutralisation of anions ( − NR + )40–44 was effected by collisional electron detachment using O 2 (at 80% transmittance of the main beam) as the collision gas in both collision cells.…”

Section: Methodsmentioning

confidence: 99%

The one‐electron oxidation of [HCCOCC]⁻ to form neutral HCCOCC, and the subsequent rearrangement of HCCOCC to form HCCCCO. An experimental and computational study

Fitzgerald

Bowie

2006

Rapid Comm Mass Spectrometry

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The singlet anion [HCCOCC]- may be made in the source of a VG ZAB 2HF mass spectrometer by the reaction between F- (from SF6) and H-C[triple chemical bond]C-O-C[triple chemical bond]C-TMS. Vertical (Franck-Condon) one-electron oxidation of [HCCOCC]- in the first collision cell produces doublet neutral HCCOCC. A combination of experiment and molecular modelling [at the CCSD(T)/aug-cc-pVDZ//B3LYP/6-31 + G(d) level of theory] provides data which are consistent with some HCCOCC neutrals being stable for the duration of the neutralisation reionisation experiment, while others rearrange to form the decomposing doublet neutral HCCCCO.

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The energetics of the formation of positive ions produced by charge-stripping from negative ions

Cited by 48 publications

References 12 publications

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Charge permutation reactions in tandem mass spectrometry

The one‐electron oxidation of [HCCOCC]⁻ to form neutral HCCOCC, and the subsequent rearrangement of HCCOCC to form HCCCCO. An experimental and computational study

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The energetics of the formation of positive ions produced by charge-stripping from negative ions

Cited by 48 publications

References 12 publications

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Generation of three isomers of C7H– in the gas phase. A joint experimental and theoretical study

Charge permutation reactions in tandem mass spectrometry

The one‐electron oxidation of [HCCOCC]− to form neutral HCCOCC, and the subsequent rearrangement of HCCOCC to form HCCCCO. An experimental and computational study

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Product

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The one‐electron oxidation of [HCCOCC]⁻ to form neutral HCCOCC, and the subsequent rearrangement of HCCOCC to form HCCCCO. An experimental and computational study