0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Sabirov L.M., Semenov D.I.
Physics Department, Samarkand State University
(15, University Blvd., Samarkand 140104, Uzbekistan; e-mail: email@example.com)
Different Structural States of 4-Methylpyridine--Water Solutions: Experimental Study of the Adiabatic Compressibility at the Hypersonic Frequency
Section: Soft Matter
Original Author's Text: English
Abstract: The behavior of the adiabatic compressibility bs with variation in the temperature t and the concentration x in the aqueous solution of a nonelectrolyte is experimentally studied from the fine structure of the spectra of light scattering. The sign inversion of the derivative of the adiabatic compressibility with respect to the concentration dbs(x)/dx and temperature dbs(t)/dt is observed. In the temperature-concentration phase diagram, the inversion points determine the lines of transition from the solution structure characterized by a nondisturbed continuous network of hydrogen bonds to the disturbed one, and, further, to the structure with fragmentary network.
Key words: Rayleigh scattering, water solution, 4-methylpyridine, adiabatic compressibility.