title: Collision-induced dissociation of imidazolium-based zwitterionic liquids.
abstract: Fragmentation pathways of some imidazolium based zwitterionic liquids-3-(3-alkyl-1-imidazolio)- propane sulfonates and 3-(2-methyl-3-alkyl-1-imidazolio)-propane sulfonates -- have been studied by tandem electrospray mass spectrometry and collision-induced dissociation. The relative abundances of the lowest energy fragment ions depend on the length of the alkyl chain at the (II)N of the imidazolium ring and the cone voltage. The first fragment ions originate from the scission of C(non aromatic)-N bond of compounds investigated, but with increasing collision energy, scission of C-C bonds occurs. Aggregates of the general formula [(M + H)(x) + (M)(y)](+) (x;y = 1-2) formed. Methyl substituted zwitterionic liquids show higher molecular stability than 3-(3-alkyl-1-imidazolio)-propane sulfonates.
authors: Faculty of Chemistry, University of Latvia, Riga, Latvia. ilva.nakurte@gmail.com
authors: Ilva
authors: I
authors: Nakurte
authors: Peteris
authors: P
authors: Mekss
authors: Kristaps
authors: K
authors: Klavins
authors: Andris
authors: A
authors: Zicmanis
authors: Galina
authors: G
authors: Vavilina
authors: Svetlana
authors: S
authors: Dubrovina