title: Charge reversal Fourier transform ion cyclotron resonance mass spectrometry.
abstract: We report the first charge reversal experiments performed by tandem-in-time rather than tandem-in-space MS/MS. Precursor odd-electron anions from fullerene C(60), and even-electron ions from 2,7-di-tert-butylfluorene-9-carboxylic acid and 3,3'-bicarbazole were converted into positive product ions ((-)CR(+)) inside the magnet of a Fourier transform ion cyclotron resonance mass spectrometer. Charge reversal was activated by irradiating precursor ions with high energy electrons or UV photons: the first reported use of those activation methods for charge reversal. We suggest that high energy electrons achieve charge reversal in one step as double electron transfer, whereas UV-activated (-)CR(+) takes place stepwise through two single electron transfers and formally corresponds to a neutralization-reionization ((-)NR(+)) experiment.
authors.affiliation: National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA.
authors.forename: Vladislav V
authors.initials: VV
authors.lastname: Lobodin
authors.forename: Joshua J
authors.initials: JJ
authors.lastname: Savory
authors.forename: Nathan K
authors.initials: NK
authors.lastname: Kaiser
authors.forename: Paul W
authors.initials: PW
authors.lastname: Dunk
authors.forename: Alan G
authors.initials: AG
authors.lastname: Marshall