Omarkulova, Aziza2018-10-312018-10-312017-04Aziza Omarkulova. Brillouin visco-elastometry and Raman spectroscopy of potassium permanganate aqueous solutions. 2017. Department of Physics, School of Science and Technology, Nazarbayev Universityhttp://nur.nu.edu.kz/handle/123456789/3575This 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.enAttribution-NonCommercial-ShareAlike 3.0 United StatesKMnO4 aqueous solutionsBrillouin visco-elastometryMaster's thesis