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Mass spectrometric investigation of N-sulfonylated purine nucleic bases and nucleosides

Srzić, Dunja; Rožman, Marko; Krizmanić, Irena; Žinić, Biserka (2003) Mass spectrometric investigation of N-sulfonylated purine nucleic bases and nucleosides. Rapid Communications in Mass Spectrometry, 17 (5). pp. 377-382. ISSN 0951-4198

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Abstract

The gas/phase behaviour of N-sulfonylated purine nucleic bases and nucleosides towards electron impact (EI) and matrix-assisted laser desorption/ionization (MALDI) occurring in a ion trap of a Fourier transform ion cyclotron resonance mass spectrometer is investigated. The influence of the storage time on the protonated molecule ([M+H](+)) abundance under EI conditions confirms that the formation of these ions proceeds through ion/molecule reactions. Using stored-waveform inverse Fourier transform (SWIFT) selective isolation of M+ or H3O+, self-chemical ionization, M+/M, and chemical ionization, H3O+/M, are detected. Investigation of specific EI expulsion of SO2, SO2H and/or SO2H2 from M+ and/or [M+H](+) shows that oxygen protonation in -SO2- proceeds faster than nitrogen protonation. Expulsion of SO2 from molecular ions is not observed in MALDI mass spectra of nucleosides.

Item Type: Article
Additional Information: "This is the peer reviewed version of the following article:Srzić, Dunja; Rožman, Marko; Krizmanić, Irena; Žinić, Biserka (2003) Mass spectrometric investigation of N-sulfonylated purine nucleic bases and nucleosides. Rapid Communications in Mass Spectrometry, 17 (5). pp. 377-382, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/rcm.930/full . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."
Uncontrolled Keywords: mass spectrometry; sulfonylated purine nucleic bases and nucleosides
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Physical Chemistry
Depositing User: Kristina Ciglar
Date Deposited: 20 Jan 2017 16:08
Last Modified: 26 Jan 2017 13:24
URI: http://fulir.irb.hr/id/eprint/3342
DOI: 10.1002/rcm.930

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