Charge Reversal Fourier Transform Ion Cyclotron Resonance Mass Spectrometry |
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| Authors: | Vladislav V. Lobodin Joshua J. Savory Nathan K. Kaiser Paul W. Dunk Alan G. Marshall |
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| Affiliation: | 1. National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA
2. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
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| 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 C60, 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.  | |
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