title: Collision-induced dissociation of hydrated adenosine monophosphate nucleotide ions: protection of the ion in water nanoclusters.
abstract: Fragmentation of singly charged anions of adenosine 5'-monophosphate (AMP-) induced by collisions with neutral atoms (Ne, Na) has been studied at a collision energy of 50 keV. The experiments were performed with isolated AMP- as well as with AMP- anions nanosolvated in a cluster with a given number m of water molecules. In the first case, the dominant fragmentation channels concern the loss of adenine, PO3- and H2PO4-. In the latter, loss of water molecules becomes the dominating process, and the AMP- ion is fully protected when m is larger than approximately 13. The observed fragment distributions are well described with the model of an evaporative ensemble.
authors.affiliation: Department for Physics and Astronomy, University of Aarhus, DK-8000 Arhus C, Denmark.
authors.forename: B
authors.initials: B
authors.lastname: Liu
authors.forename: S
authors.initials: S
authors.lastname: Brøndsted Nielsen
authors.forename: P
authors.initials: P
authors.lastname: Hvelplund
authors.forename: H
authors.initials: H
authors.lastname: Zettergren
authors.forename: H
authors.initials: H
authors.lastname: Cederquist
authors.forename: B
authors.initials: B
authors.lastname: Manil
authors.forename: B A
authors.initials: BA
authors.lastname: Huber