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dc.contributorWichita State University. Department of Chemistryen_US
dc.contributor.authorDain, Ryan P.en_US
dc.contributor.authorVan Stipdonk, Michael J.en_US
dc.identifier.citationRapid communications in mass spectrometry : RCM. 2008 Jul; 22(13): 2044-52.en_US
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractSingly and doubly charged cluster ions of ammonium tetrafluoroborate (NH4BF4) with general formula [(NH4BF4)nNH4]+ and [(NH4BF4)m(NH4)2]2+, respectively, were generated by electrospray ionization (ESI) and their fragmentation examined using collision-induced dissociation (CID) and ion-trap tandem mass spectrometry. CID of [(NH4BF4)nNH4]+ caused the loss of one or more neutral NH4BF4 units. The n = 2 cluster, [(NH4BF4)2NH4]+, was unique in that it also exhibited a dissociation pathway in which HBF4 was eliminated to create [(NH4BF4)(NH3)NH4]+. Dissociation of [(NH4BF4)m(NH4)2]2+ occurred through two general pathways: (a) 'fission' to produce singly charged cluster ions and (b) elimination of one or more neutral NH4BF4 units to leave doubly charged product ions. CID profiles, and measurements of changing precursor and product ion signal intensity as a function of applied collision voltage, were collected for [(NH4BF4)nNH4]+ and compared with those for analogous [(NaBF4)nNa]+ and [(KBF4)nK]+ ions to determine the influence of the cation on the relative stability of cluster ions. In general, the [(NH4BF4)nNH4]+ clusters were found to be easier to dissociate than both the sodium and potassium clusters of comparable size, with [(KBF4)nK]+ ions the most difficult to dissociate.en_US
dc.publisherJohn Wiley and Sonsen_US
dc.relation.ispartofseriesRapid communications in mass spectrometry : RCMen_US
dc.relation.ispartofseriesRapid Commun. Mass Spectrom.en_US
dc.titleGeneration and collision-induced dissociation of ammonium tetrafluoroborate cluster ionsen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2008 John Wiley & Sons, Ltd.en_US

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