Effect of temperature on the mobility of ions

The effect of temperature, between 87 and 250{degree}C, on the mobility of protonated amines in helium, air, CO{sub 2}, and SF{sub 6} was studied by ion mobility spectrometry. In helium, the reduced mobility was found to decrease as the temperature was raised, due to an increase in the collision cro...

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Bibliographic Details
Published in:Journal of the American Chemical Society 1989-08, Vol.111 (16), p.6015-6018
Main Authors: Karpas, Zeev, Berant, Zvi, Shahal, Oded
Format: Article
Language:English
Subjects:
400201 - Chemical & Physicochemical Properties
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
Condensed matter: structure, mechanical and thermal properties
DATA
DATA ANALYSIS
Diffusion in solids
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HIGH TEMPERATURE
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ION SPECTROSCOPY
IONS
MEASURING INSTRUMENTS
MEASURING METHODS
MEDIUM TEMPERATURE
MOBILITY
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
Physics
RARE GASES
SPECTROSCOPY
TEMPERATURE EFFECTS
Theory of diffusion and ionic conduction in solids
Transport properties of condensed matter (nonelectronic)
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Summary:The effect of temperature, between 87 and 250{degree}C, on the mobility of protonated amines in helium, air, CO{sub 2}, and SF{sub 6} was studied by ion mobility spectrometry. In helium, the reduced mobility was found to decrease as the temperature was raised, due to an increase in the collision cross section, and was approximately proportional to T{sup {minus}1/2}. In CO{sub 2}, where clustering takes place at low temperatures, raising the temperature led to an increase in the reduced mobility, mainly due to breakdown of the clusters and a decrease in the effective mass of the ion. In air, where only little clustering was observed, the reduced mobility of light ions increases with the temperature, while for heavy ions the opposite was found. In SF{sub 6}, like in CO{sub 2}, the increase of the reduced mobility with temperature was attributed to breakdown of clusters. An expression for the temperature dependence of the reduced mobility in each of these drift gases was determined semiempirically.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja00198a007