Positive and negative electrospray mass spectrometry (MS), in-time and in-space MS" experiments, high-resolution and accurate mass measurements obtained with an Orbitrap, together with density functional theory calculations have been used to study the gas-phase ion chemistry of a series of fluorinated 1,2,4-triazines. As a result of low-energy collision-induced dissociations, occurring in an ion trap and in a triple quadrupole, their protonated and deprotonated molecules show interesting features depending on the nature and structure of the precursor ions. The occurrence of elimination /hydration reactions produced by positive ions in the ion trap is noteworthy. Decompositions of deprotonated molecules, initiated by elimination of a hydroxyl radical from [M-H](-), are dominated by radical anions. Theoretical calculations have allowed us to obtain information on atom sites involved in the protonation and deprotonation reactions.
GIORGI G, PALUMBO PICCIONELLO A, PACE A, BUSCEMI S (2008). Effect of protonation and deprotonation on the gas-phase reactivity of fluorinated 1,2,4-triazines. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 19, 689-694 [10.1016/j.jasms.2008.01.014].
Effect of protonation and deprotonation on the gas-phase reactivity of fluorinated 1,2,4-triazines
PALUMBO PICCIONELLO, Antonio;PACE, Andrea;BUSCEMI, Silvestre
2008-01-01
Abstract
Positive and negative electrospray mass spectrometry (MS), in-time and in-space MS" experiments, high-resolution and accurate mass measurements obtained with an Orbitrap, together with density functional theory calculations have been used to study the gas-phase ion chemistry of a series of fluorinated 1,2,4-triazines. As a result of low-energy collision-induced dissociations, occurring in an ion trap and in a triple quadrupole, their protonated and deprotonated molecules show interesting features depending on the nature and structure of the precursor ions. The occurrence of elimination /hydration reactions produced by positive ions in the ion trap is noteworthy. Decompositions of deprotonated molecules, initiated by elimination of a hydroxyl radical from [M-H](-), are dominated by radical anions. Theoretical calculations have allowed us to obtain information on atom sites involved in the protonation and deprotonation reactions.File | Dimensione | Formato | |
---|---|---|---|
10.1016%2Fj.jasms.2008.01.014.pdf
Solo gestori archvio
Descrizione: pdf
Dimensione
600.6 kB
Formato
Adobe PDF
|
600.6 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.