Accession Number : ADA295705
Title : Reactions of Atmospheric Cluster Ions.
Descriptive Note : Annual rept. 1 Jan 94-31 May 95,
Corporate Author : COLORADO UNIV AT BOULDER
Personal Author(s) : Leone, Stephen R. ; Bierbaum, Veronica M.
PDF Url : ADA295705
Report Date : 31 MAY 1995
Pagination or Media Count : 3
Abstract : A flow-drift tube instrument has been employed to measure the mobilities of five cluster ion systems that have been detected in the earth's atmosphere. The mobilities of NO+(H2O)0-2, H3O+(H2O)0-3, NH4+(NH3)0-3, NH4+(CH3CN)0-3, and NO+(CH3CN)0-3 were determined as a function of field strength by the dual ion signal depletion method. For H3O+(H2O)0-3 cluster ions, the reduced zero-field mobility decreases by almost equal amounts as a function of n, whereas for the NH4+(NH3)0-3, NH4+(CH3CN)0-3, and NO+(CH3CN)0-3 cluster ions, the decrease in mobility with cluster size is more gradual for higher n. A simple geometrical model based on the effective cross- sectional area of the cluster ions is consistent with the observed n-dependence of the mobilities. jg
Descriptors : *IONS, *CLUSTERING, *ATMOSPHERIC CHEMISTRY, SIZES(DIMENSIONS), ACETONITRILE, WATER, AMMONIA, CHEMICAL REACTIONS, LIGANDS, GEOMETRY, AMMONIUM COMPOUNDS, SOLVATION, NITRIC ACID, FIELD INTENSITY, ELECTRON MOBILITY, EARTH ATMOSPHERE.
Subject Categories : Physical Chemistry
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE