FT‐ICR mass spectrometry: Superconducting magnet, external ion source, ion–molecule reactions, and ion–ion traps

2021 ◽  
Author(s):  
Karl Peter Wanczek ◽  
Basem Kanawati
Keyword(s):  
Mass Spectrometry ◽  
Superconducting Magnet ◽  
Ion Traps ◽  
Ion Source ◽  
Ion Molecule Reactions ◽  
Ft Icr

Ion−Molecule Reactions for the Characterization of Polyols and Polyol Mixtures by ESI/FT-ICR Mass Spectrometry

2005 ◽  
Vol 77 (5) ◽  
pp. 1385-1392 ◽  
Author(s):  
Michael A. Watkins ◽  
Brian E. Winger ◽  
Ryan C. Shea ◽  
Hilkka I. Kenttämaa
Keyword(s):  
Mass Spectrometry ◽  
Ion Molecule Reactions ◽  
Ft Icr

High mass resolution glow discharge mass spectrometry using an external ion source FT-ICR mass spectrometer

1993 ◽  
Vol 65 (20) ◽  
pp. 2801-2804 ◽  
Author(s):  
Clifford H. Watson ◽  
John. Wronka ◽  
Frank H. Laukien ◽  
Christopher M. Barshick ◽  
John R. Eyler
Keyword(s):  
Mass Spectrometry ◽  
Glow Discharge ◽  
Mass Spectrometer ◽  
Ion Source ◽  
Mass Resolution ◽  
Glow Discharge Mass Spectrometry ◽  
High Mass ◽  
High Mass Resolution ◽  
Ft Icr

Proton-induced reactions of [2.2]-paracyclophane in the gas phase. A study by FT-ICR-spectrometry and DFT calculation

2017 ◽  
Vol 23 (6) ◽  
pp. 327-340
Author(s):  
Heinz-Hermann Büker ◽  
Hans-Friedrich Grützmacher
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Vinyl Ether ◽  
Proton Affinity ◽  
Ion Source ◽  
Ethyl Vinyl Ether ◽  
Dft Methods ◽  
Ethyl Vinyl ◽  
Carbenium Ions ◽  
Ft Icr

The reactions of the [2-2]-paracyclophane 1 and the [2-2]-metaparacyclopane 2 in the gas phase after protonation by CI(CH4) or CI(I-C4H10) were studied by FT-ICR mass spectrometry. The ions C16H17+ produced in the external ion source of the FT-ICR instrument were transferred into the ICR cell containing the neutral reactant, and the reactions were analyzed measuring the efficiency of the transfer of a proton to a series of bases with known proton affinity and gas phase basicity as well as the efficiency of the ion-molecule reaction with ethyl vinyl ether. Both reaction types show that the ions C16H17+ produced by chemical ionization (CI) consist of two sets of isomeric ions A and B which exhibit distinctly different behavior on deprotonation and of the reaction with ethyl methyl ether. Isomer(s) A (about 65% of the ion population) react efficiently with this vinyl ether by an addition/elimination process typical of primary and secondary benzylic carbenium ions, while isomer B (about 35% of the ion population) undergoes only an ineffective deprotonation by the vinyl ether. By bracketing deprotonation, it is shown that A is actually composed of two isomers A1 and A2 with slightly different proton affinity and gas phase basicity. These two ions have been identified using CA-mass spectrometry as protonated 3-phenethylstyrene (A1) and protonated 4-phenethylstyrene (A2). The CA-mass spectrum of the isomer B indicated that these ions C16H17+ correspond to protonated 1-(ethyl phenyl)-1-phenyl-ethene. This agrees with the rather strong basicity of the conjugated base of ions B, which results in a slow deprotonation. A protonated 1-(ethyl phenyl)-1-phenyl-ethene can arise from a protonated 2-phenethylstyrene by H- and subsequent phenyl shifts, but requires the preceding rearrangement of the protonated [2.2]-paracyclophane into the protonated isomer “[2.2]-orthocyclophane” – the 1,5-dibenzocyclooctadiene. The possibility of such a deep-sited rearrangement was studied by the computation of the relevant reaction routes applying DFT-methods at the level B3LYP/6-311+g(3d,2p)//B3LYP/3-21g) to analyze the reaction mechanisms.

Reduction Reactions in the Ion Source in Electron Ionization Mass Spectrometry

2020 ◽  
Vol 75 (13) ◽  
pp. 1685-1692
Author(s):  
D. M. Mazur ◽  
M. E. Zimens ◽  
Th. B. Latkin ◽  
N. V. Ul’yanovskii ◽  
V. B. Artaev ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ion Source ◽  
Electron Ionization ◽  
Electron Ionization Mass Spectrometry ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Reduction Reactions

Unprecedented Ultrahigh Resolution FT-ICR Mass Spectrometry and Parts-Per-Billion Mass Accuracy Enable Direct Characterization of Nickel and Vanadyl Porphyrins in Petroleum from Natural Seeps

2014 ◽  
Vol 28 (4) ◽  
pp. 2454-2464 ◽  
Author(s):  
Amy M. McKenna ◽  
Jeffrey T. Williams ◽  
Jonathan C. Putman ◽  
Christoph Aeppli ◽  
Christopher M. Reddy ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Accuracy ◽  
Ultrahigh Resolution ◽  
Ft Icr
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