Jump to main content
Jump to site search

Issue 5, 2012
Previous Article Next Article

The isotope Soret effect in molecular liquids: a quantum effect at room temperatures

Author affiliations

Abstract

Diffusion in multicomponent mixtures is not only driven by concentration but also by temperature gradients. Although this so-called Soret effect plays an important role in such diverse phenomena as the composition variation in oil reservoirs or prebiotic evolution, the underlying molecular mechanisms are still not clear. Here we show that the thermodynamic part of the isotopic contribution to the Soret effect of binary liquids is a quantum effect originating at room temperature from librational and vibrational motions of the molecules. Remarkably, the ‘isotopic’ contribution is not limited to true isotopic substitution but can be the dominating effect in mixtures of chemically similar molecules. We have tested the theory for the binary mixtures from the homologous series of halobenzenes and for halobenzenes in toluene and cyclohexane.

Graphical abstract: The isotope Soret effect in molecular liquids: a quantum effect at room temperatures

Back to tab navigation

Supplementary files

Article information


Submitted
12 Sep 2011
Accepted
20 Oct 2011
First published
01 Dec 2011

Soft Matter, 2012,8, 1355-1360
Article type
Paper

The isotope Soret effect in molecular liquids: a quantum effect at room temperatures

S. Hartmann, W. Köhler and K. I. Morozov, Soft Matter, 2012, 8, 1355 DOI: 10.1039/C1SM06722B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements