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|title: ||Why is the CO2-CS2 non-ideality larger than in CO2-CCl4? A Raman scattering study|
|authors: ||Besnard, M.|
Cabaco, M. I.
Coutinho, J. A. P.
|keywords: ||INTERACTION-INDUCED SPECTRA|
|issue date: ||2013|
|publisher: ||ELSEVIER SCIENCE BV|
|abstract: ||The dense phases of the CO2-CCl4 (I) and CO2-CS2 (II) mixtures have been studied by Raman spectroscopy. Mixture I is found almost ideal and II strongly non-ideal. At high CS2 concentration in II, the local structure of CS2 is preserved suggesting a nano-segregation of the liquid phase without demixing whereas in CO2 concentrated mixtures a diversity of species are present. Thermodynamical considerations together with spectroscopic results show that a subtle interplay between attractive and repulsive interactions leads to this non-ideal behaviour. The connection of these results with the liquid-liquid demixing reported for CO2-CS2 at lower temperature is discussed. (C) 2013 Elsevier B. V. All rights reserved.|
|publisher version/DOI: ||http://doi.org/10.1016/j.cplett.2013.07.061|
|source: ||CHEMICAL PHYSICS LETTERS|
|appears in collections||CICECO - Artigos|
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