Comparative study of collision-induced and surface-induced dissociation. 2. fragmentation of small alanine-containing peptides in FT-ICR MS
Article Abstract:
A 7 T Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) was applied for examining the multiple-collision activation (MCA-CID) and the surface-induced dissociation (SID) of protonated trialanine, (AAA)H(super +); tetraalanine, (AAAA)H(super +); pentaalanine (AAAAA)H(super +); and prolyltetraalanine (PAAAA)H(super +) and the direct comparison of the collision energy resolved efficiency curves was also obtained using SID and multiple-collision CID. The results suggested that the internal energy distributions of ions activated by ion-surface impact and multiple-collision activation are comparable.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Activation energies for the fragmentation of thiophene ions by surface-induced dissociation
Article Abstract:
Activating energies of fragmentation for thiophene ions were extracted from surface-induced dissociation data using a method that analyzes the energy-resolved mass spectra and the kinetic energy distribution spectra of the parent and fragment ions that scatter off the surface. The proposed method extracts the activation energies by integrating over the distribution of the initial ion energy and the energy transferred to the surface. It improved the activation energies for SiMe(sub 3)(super +) -> SiMe(sub x)(super +) (x = 0-2) fragmentation at a hexanethiolate-covered gold surface.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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The fragmentation of melamine: a study via electron-impact ionization, laser-desorption ionization, collision-induced dissociation, and density functional calculations of potential energy surface
Article Abstract:
Electron-impact ionization, laser-desorption ionization and collision-induced dissociation were used to investigate the fragmentation of the melamine (2,4,6-triamino-s-triazine) molecule and its deuterated counterparts. The dissociation of melamine was found to be different from the concerted triple dissociation pathway of s-triazine. The fragmentation of melamine was found to proceed through internal conversion to its ground potential energy surface before dissociation.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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