Differences in the dynamic properties of liquid CH3CN and CD3CN above 40 °C revealed by Rayleigh–Brillouin scattering spectroscopy
✍ Scribed by Paola Sassi; Assuntina Morresi; Giulio Paliani; Rosario Sergio Cataliotti
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 84 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0377-0486
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✦ Synopsis
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.