ON THE STRUCTURE OF WATER-ALCOHOL AND AMMONIA ALCOHOL PROTONATED CLUSTERS

Citation
Z. Karpas et al., ON THE STRUCTURE OF WATER-ALCOHOL AND AMMONIA ALCOHOL PROTONATED CLUSTERS, Journal of the American Society for Mass Spectrometry, 4(6), 1993, pp. 507-512
Citations number
31
Categorie Soggetti
Chemistry Physical","Chemistry Analytical",Spectroscopy
ISSN journal
10440305
Volume
4
Issue
6
Year of publication
1993
Pages
507 - 512
Database
ISI
SICI code
1044-0305(1993)4:6<507:OTSOWA>2.0.ZU;2-K
Abstract
Collision-induced dissociation (CID) of protonated ammonia-alcohol and water-alcohol heteroclusters was studied using a triple quadrupole ma ss spectrometer with a corona discharge atmospheric pressure ionizatio n source. CID results suggested that the ammonia-alcohol clusters had NH4+ at the core of the cluster and that hydrogen-bonded alcohol molec ules solvated this central ion. In contrast, CID results in water-alco hol clusters showed that water loss was strongly favored over alcohol loss and that there was a preference for the charge to reside on an al cohol molecule. The results also indicated that a loose chain of hydro gen-bonded molecules was formed in the water-alcohol clusters and that there appeared to be no rigid protonation site or a fixed central ion .