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
      Atmospheric Physics
      Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE