Size-dependent diffusion in cycloalkanes

The translational diffusion constants, D, of biphenyl, trans-stilbene, 1,4-diphenyl-1,3-butadiene, 1,1,4,4-tetraphenyl-1,3-butadiene, 1,6-diphenyl-1,3,5-hexatriene, tetraphenylethylene, 9,10-diphenylanthracene, bibenzyl, triptycene, perylene and 2,3-benzanthracene (tetracene) have been measured in c...

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Bibliographic Details
Published in:Molecular physics 2004-07, Vol.102 (13), p.1489-1497
Main Authors: Kowert, Bruce. A., Jones, Jared B., Zahm, Jacob A., Turner II, Robert M.
Format: Article
Language:English
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Summary:The translational diffusion constants, D, of biphenyl, trans-stilbene, 1,4-diphenyl-1,3-butadiene, 1,1,4,4-tetraphenyl-1,3-butadiene, 1,6-diphenyl-1,3,5-hexatriene, tetraphenylethylene, 9,10-diphenylanthracene, bibenzyl, triptycene, perylene and 2,3-benzanthracene (tetracene) have been measured in combinations of the cycloalkanes cyclohexane, methylcyclohexane, n-butylcyclohexane, cis-decalin and trans-decalin using capillary flow techniques. Tetracene and chrycene have been studied in a series of n-alkanes. Deviations from the Stokes-Einstein (SE) relation (D = k B T/6πηr) were found. For a given solute, the hydrodynamic radius r decreases as both the viscosity η and the solvent/solute size ratio increase; the data were fitted to D/T = A/η  p with p
ISSN:0026-8976
1362-3028
DOI:10.1080/00268970410001734251