Biomolecular ions in accelerators and storage rings

SB Nielsen, JU Andersen, P Hvelplund… - Journal of Physics B …, 2004 - iopscience.iop.org
Recent experiments on biomolecules in accelerators and storage rings are reviewed. Topics
included are measurements of geometrical cross sections of macromolecular ions …

Theoretical study of ionization potentials and dissociation energies of fullerenes 1 and 2)

S Dı́az-Tendero, M Alcamı́, F Martı́n - The Journal of chemical physics, 2003 - pubs.aip.org
We have evaluated electronic energies of neutral, singly charged and doubly charged
fullerenes with sizes n= 50–60 using density functional (DFT) theory. For each value of the …

Electronic response of in slow collisions with highly charged ions

H Cederquist, A Fardi, K Haghighat, A Langereis… - Physical Review A, 2000 - APS
We present measurements of projectile angular differential cross sections, d σ/d θ, and
mean projectile energy gain or loss, Δ E mean, as functions of the number s of electrons …

The histidine effect. Electron transfer and capture cause different dissociations and rearrangements of histidine peptide cation-radicals

F Turecek, TW Chung, CL Moss, JA Wyer… - Journal of the …, 2010 - ACS Publications
Electron-transfer and-capture dissociations of doubly protonated peptides gave dramatically
different product ions for a series of histidine-containing pentapeptides of both non-tryptic …

Electronic excitation in collisions: Evaporation and ionization

J Opitz, H Lebius, S Tomita, BA Huber, PM Capelle… - Physical Review A, 2000 - APS
We have studied energy transfer, fragmentation, and ionization in collisions between
protons and C 60 molecules. The collision energy is varied between 1 and 300 keV and we …

Fast side-chain losses in keV ion-induced dissociation of protonated peptides

S Bari, R Hoekstra, T Schlathölter - International Journal of Mass …, 2011 - Elsevier
In this paper, we compare ionization and dissociation of a series of singly and doubly
protonated peptides, namely leucine enkephalin, bradykinin, LHRH and substance P as …

Unimolecular dissociation of anthracene and acridine cations: The importance of isomerization barriers for the C2H2 loss and HCN loss channels

HAB Johansson, H Zettergren, AIS Holm… - The Journal of …, 2011 - pubs.aip.org
The loss of C 2 H 2 is a low activation energy dissociation channel for anthracene (C 14 H
10) and acridine (C 13 H 9 N) cations. For the latter ion another prominent fragmentation …

[HTML][HTML] On the survival of peptide cations after electron capture: Role of internal hydrogen bonding and microsolvation

T Chakraborty, AIS Holm, P Hvelplund… - Journal of the American …, 2006 - Elsevier
Electron capture by both bare and microsolvated small peptide dications was investigated
by colliding these ions with sodium vapor in an accelerator mass spectrometer to provide …

On the Mechanism of Electron-Capture-Induced Dissociation of Peptide Dications from 15N-Labeling and Crown-Ether Complexation

AIS Holm, P Hvelplund, U Kadhane… - The Journal of …, 2007 - ACS Publications
15N-labeling of di-and tripeptides reveals that electron capture to doubly protonated
peptides results almost exclusively in ammonia loss from the N-terminal end, which clearly …

Stability and Structure of Protonated Clusters of Ammonia and Water, H+(NH3)m (H2O)n

P Hvelplund, T Kurten, K Støchkel… - The Journal of …, 2010 - ACS Publications
Mass spectrometric experiments show that protonated mixed ammonia/water clusters
predominant exist in three forms namely H+ (NH3) 4 (H2O) n, H+ (NH3) 5 (H2O) n, and H+ …