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.

Report Date:

1995-05-31

Pagination or Media Count:

3.0

Abstract:

A flow-drift tube instrument has been employed to measure the mobilities of five cluster ion systems that have been detected in the earths atmosphere. The mobilities of NOH2O0-2, H3OH2O0-3, NH4NH30-3, NH4CH3CN0-3, and NOCH3CN0-3 were determined as a function of field strength by the dual ion signal depletion method. For H3OH2O0-3 cluster ions, the reduced zero-field mobility decreases by almost equal amounts as a function of n, whereas for the NH4NH30-3, NH4CH3CN0-3, and NOCH3CN0-3 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