Raman spectroscopic evidence for the most stable water/ethanol dimer and for the negative mixing energy in cold water/ethanol trimers
2008 | journal article. A publication of Göttingen
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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
Nedic, M.; Wassermann, T. N.; Xue, Z.; Zielke, P. & Suhm, M. A. (2008)
Physical Chemistry Chemical Physics, 10(39) pp. 5953-5956. DOI: https://doi.org/10.1039/b811154e
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Details
- Authors
- Nedic, Marija; Wassermann, Tobias N.; Xue, Z.; Zielke, Philipp; Suhm, Martin A.
- 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.
- Issue Date
- 2008
- Status
- published
- Publisher
- Royal Soc Chemistry
- Journal
- Physical Chemistry Chemical Physics
- Organization
- Institut für Physikalische Chemie
- ISSN
- 1463-9076
- Sponsor
- DFG [Su 121/2]; FCI
