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Issue 39, 2008
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Raman spectroscopic evidence for the most stable water/ethanol dimer and for the negative mixing energy in cold water/ethanol trimers

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Abstract

Spontaneous Raman scattering in supersonic jet expansions is used to prove that the mixed dimer of ethanol and water (corresponding to a volume fraction of 79% ethanol in the liquid) prefers ethanol in a gauche conformation as the hydrogen bond acceptor. This represents a particularly simple case of adaptive aggregation. Furthermore, it is shown experimentally that the isolated cold trimer built from one ethanol and two waters (corresponding to 64% ethanol in the liquid) has a significantly negative excess enthalpy, in line with the thermodynamic bulk observation at room temperature.

Graphical abstract: Raman spectroscopic evidence for the most stable water/ethanol dimer and for the negative mixing energy in cold water/ethanol trimers

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Article information


Submitted
01 Jul 2008
Accepted
25 Jul 2008
First published
18 Aug 2008

Phys. Chem. Chem. Phys., 2008,10, 5953-5956
Article type
Communication

Raman spectroscopic evidence for the most stable water/ethanol dimer and for the negative mixing energy in cold water/ethanol trimers

M. Nedić, T. N. Wassermann, Z. Xue, P. Zielke and M. A. Suhm, Phys. Chem. Chem. Phys., 2008, 10, 5953
DOI: 10.1039/B811154E

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