The Mobilities of Ions and Cluster Ions Drifting in Polar Gas

Published

April 1, 1997

Author(s)

J A. de Gouw, M Krishnamurthy, S R. Leone

Abstract

The mobility of ions drifting in polar gases is explored both theoretically and experimentally. New expermental results are presented for (1) NO+ ions drifting in H₂O (the resuced zero-field mobility K₀⁽⁰⁾ is 0.66+or-}0.07 cm₂V^-1s^-1), (2) H₃O+(H6d2^O)₃ ions drifting in H₂O (K₀⁽⁰⁾=0.43+or-}0.06cm₂V^-1s^-1), and (3) NO+(CH₃COCH₃)_nions(n=2,3) drifting in CH₃COCH₃(K₀⁽⁰⁾=0.041+or-}0.010cm²V^-1s^-1 for n=2 and K⁰⁽⁰⁾=0.050+or-}0.015cm²V^-1s^-1 for n=3). A number of theoretical models for ion mobilities in polar gases are described. The models are compared with the avalible experimental data and a resonable agreement is obtained. For larger cluster ions the measured mobilities are considerably smaller than the calculated values. Some possible reasons for the discrepancies are discussed, including momentum transfer outside the capture cross section, dipole-dipole interactions, ligand exchange, inelastic collisions, and the validity of Blanc's law.

Citation

Journal of Chemical Physics

Volume

106

Issue

No. 14

Pub Type

Journals

Keywords

ion mobility, ion-dipole interaction

Citation

de Gouw, J. , Krishnamurthy, M. and Leone, S. (1997), The Mobilities of Ions and Cluster Ions Drifting in Polar Gas, Journal of Chemical Physics (Accessed April 20, 2024)