Brillouin visco-elastometry and Raman spectroscopy of potassium permanganate aqueous solutions
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Date
2017-04
Authors
Omarkulova, Aziza
Journal Title
Journal ISSN
Volume Title
Publisher
Nazarbayev University School of Science and Technology
Abstract
This thesis tries to find connection between mechanical and chemical properties of
KMnO4 aqueous solutions with variable opacity. To the best of our knowledge, there
was no research done on this or similar topic.
The aqueous solutions of KMnO4 with various concentrations of KMnO4 were
studied using Brillouin and Raman spectroscopies. Elastic and viscous properties
and their change due to sample concentration is investigated by Brillouin experiment.
Graphs and tables showing these changes are also included in this work. Raman
spectra of the sample solutions gives information about molecular interaction on a
microscopic level.
The thesis includes derivation of the frequency shift and linewidth for Brillouin
and Raman scatterings, as well as the assignment of vibrational modes for Raman
scattering. For Brillouin scattering it was found that the solutions become stiffer and
less viscous with increase of concentration of KMnO4 in water and Raman scattering
showed that the solutions possess stretching vibration modes of permanganate ions
and intramolecular O-H bending modes of water molecules. At the end possible
relation between elastic property and active stretching vibrational modes is discussed.
Also application of viscous property of aqueous KMnO4 for more effective water
treatment is proposed.
Description
Keywords
KMnO4 aqueous solutions, Brillouin visco-elastometry
Citation
Aziza Omarkulova. Brillouin visco-elastometry and Raman spectroscopy of potassium permanganate aqueous solutions. 2017. Department of Physics, School of Science and Technology, Nazarbayev University