Diffusion in organic liquids. 3. The isotope mass effect and diffusivity of cyclohexane diffusing in a range of solvents
Journal Article
·
· J. Phys. Chem.; (United States)
A gel-sectioning technique was used to examine the diffusivity and isotope mass effect for diffusion of cyclohexane tracers diffusing as trace solutes in the series of solvents: benzene, perfluorobenzene, n-hexane, n-heptane, n-octane, and n-dodecane. The measured diffusion coefficients show a parallel variation with solvent type and viscosity to that observed previously for other systems. The isotope mass effects vary considerably, being normal for perfluorobenzene (i.e, with the diffusion coefficient for the lighter species (D/sub L/) being greater than that for the heavier species (D/sub H/), zero for benzene, n-dodecane, and n-octane, and inverse (D/sub H/ > D/sub L/) for the two solvents of lowest viscosity. The last confirms the observation of similar behavior for self-diffusion in cyclohexane but is different to the situation noted for benzene (D/sub L/ < D/sub H/ for all solvents examined). There is currently no theoretical model which predicts this distinction.
- Research Organization:
- Univ. of Strathclyde, Glasgow, Scotland
- OSTI ID:
- 6603703
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:1; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
ALKANES
AROMATICS
BENZENE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CYCLOALKANES
CYCLOHEXANE
DEUTERIUM
DIFFUSION
DODECANE
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HEPTANE
HEXANE
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
NUCLEI
OCTANE
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIOISOTOPES
STABLE ISOTOPES
TRITIUM
YEARS LIVING RADIOISOTOPES
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
ALKANES
AROMATICS
BENZENE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CYCLOALKANES
CYCLOHEXANE
DEUTERIUM
DIFFUSION
DODECANE
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HEPTANE
HEXANE
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
NUCLEI
OCTANE
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIOISOTOPES
STABLE ISOTOPES
TRITIUM
YEARS LIVING RADIOISOTOPES