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Issue 34, 2011
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Measuring acetic acid dimer modes by ultrafast time-domain Raman spectroscopy

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Abstract

Acetic acid is capable of forming strong multiple hydrogen bonds and therefore different dimeric H-bonded structures in neat liquid phase and in solutions. The low frequency Raman spectra of acetic acid (neat, in aqueous solution and as a function of temperature) were obtained by ultrafast time and polarization resolved optical Kerr effect (OKE) measurements. Isotropic OKE measurements clearly reveal a specific totally symmetric mode related to the dimeric structure H-bond stretching mode. The effects of isotope substitution, water dilution and temperature on this mode were investigated. These results together with anisotropic OKE measurements and density functional theory calculations for a number of possible dimers provide strong evidence for the cyclic dimer structure being the main structure in liquid phase persisting down to acetic acid concentrations of 10 M. Some information about the dimer structure and concentration dependence was inferred.

Graphical abstract: Measuring acetic acid dimer modes by ultrafast time-domain Raman spectroscopy

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Article information


Submitted
31 Mar 2011
Accepted
09 May 2011
First published
31 May 2011

Phys. Chem. Chem. Phys., 2011,13, 15573-15579
Article type
Paper

Measuring acetic acid dimer modes by ultrafast time-domain Raman spectroscopy

I. A. Heisler, K. Mazur, S. Yamaguchi, K. Tominaga and S. R. Meech, Phys. Chem. Chem. Phys., 2011, 13, 15573 DOI: 10.1039/C1CP20990F

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