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Differences in the dynamic properties of liquid CH 3 CN and CD 3 CN above 40 °C revealed by Rayleigh–Brillouin scattering spectroscopy
Author(s) -
Sassi Paola,
Morresi Assuntina,
Paliani Giulio,
Cataliotti Rosario Sergio
Publication year - 1999
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199907)30:7<501::aid-jrs402>3.0.co;2-2
Subject(s) - isotopomers , chemistry , rayleigh scattering , compressibility , brillouin scattering , brillouin spectroscopy , intermolecular force , spectroscopy , shear viscosity , viscosity , molecular physics , nuclear magnetic resonance , analytical chemistry (journal) , thermodynamics , physics , organic chemistry , optics , quantum mechanics , molecule , optical fiber
Remarkable differences in some physical properties, such as number density, shear viscosity, sound velocity and adiabatic compressibility, were observed above 40 °C in the isotopomer pair CH 3 CN and CD 3 CN. These differences do not fall within the normal dynamic isotope effects; they were demonstrated by studying the Brillouin spectra of liquid CD 3 CN as a function of temperature and wavevector, correlating the scattering measurements with those of density and viscosity. An interpretation of these peculiar effects is attempted on the basis of the small differences in the intermolecular interactions in the two isotopomers. Copyright © 1999 John Wiley & Sons, Ltd.