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Solvent-induced shift of the Raman spectra in supercritical fluids

✍ Scribed by Seiji Akimoto; Okitsugu Kajimoto

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
443 KB
Volume
209
Category
Article
ISSN
0009-2614

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✦ Synopsis

The shifts of Raman band due to solvation effects were measured in various supexcritical fluids which cover a wide density range from gaseous to liquid state. The C==O stretching of acetone and the C=N stretching of acetonitrile were found to be redshifted as the density of fluid increased. The magnitude of the shifts depends strongly on the solute molecules and the fluids used, Ar, CO*, CF,Cl and CFaH. The shifts of the C-0 stretching were also measured in mixed CFIH-Ar fluids. The observed trends were interpreted in terms of the intermolecular potential between the solute and the solvent molecules.

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