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- W2016072028 abstract "Fundamental studies have greatly improved our understanding of electrospray, including the underlying electrochemical reactions. Generally regarded as disadvantageous, we have recently shown that corona discharge (CD) can be used as an effective method to create a radical cation species [M]+., thus optimizing the electrochemical reactions that occur on the surface of the stainless steel (SS) electrospray capillary tip. This technique is known as CD initiated electrochemical ionization (CD-ECI). Here, we report on the fundamental studies using CD-ECI to induce analytically useful in-source fragmentation of a range of molecules that complex transition metals. Compounds that have been selectively fragmented using CD-ECI include enolate forming phenylglycine containing peptides, glycopeptides, nucleosides, and phosphopeptides. Collision induced dissociation (CID) or other activation techniques were not necessary for CD-ECI fragmentation. A four step mechanism was proposed: (1) complexation using either Fe in the SS capillary tip material or Cu(II) as an offline complexation reagent; (2) electrochemical oxidation of the complexed metal and thus formation of a radical cation (e.g.; Fe − e− → Fe+); (3) radical fragmentation of the complexed compound; (4) electrospray ionization of the fragmented neutrals. Fragmentation patterns resembling b- and y-type ions were observed and allowed the localization of the phosphorylation sites." @default.
- W2016072028 created "2016-06-24" @default.
- W2016072028 creator A5057728137 @default.
- W2016072028 creator A5075072986 @default.
- W2016072028 date "2010-12-01" @default.
- W2016072028 modified "2023-09-26" @default.
- W2016072028 title "Peptide fragmentation by corona discharge induced electrochemical ionization" @default.
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- W2016072028 doi "https://doi.org/10.1016/j.jasms.2010.08.018" @default.
- W2016072028 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2991398" @default.
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