Solvent properties of supercritical xenon and sulfur hexafluoride

Autor:	Robert W. Gale, S. L. Frye, Clement R. Yonker, Richard D. Smith
Rok vydání:	1987
Předmět:	Absorption spectroscopy Solvatochromism General Engineering Solvation chemistry.chemical_element Supercritical fluid Sulfur hexafluoride Solvent chemistry.chemical_compound Xenon chemistry Polarizability Physical chemistry Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry. 91:3059-3062
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100295a083
Popis:	The UV absorption solvatochromic shift for a probe solute (2-nitroanisole) has been used to explore the solvent properties of supercritical SF/sub 6/, Xe, and C/sub 2/H/sub 6/. The ..pi..* polarity/polarizability scale established by Kamlet, Taft, and co-workers has been used to compare solvent properties with liquids and previously studied supercritical fluids (CO/sub 2/ and NH/sub 3/). The ..pi..* measurements for Xe show that it is a less polar/polarizable solvent then CO/sub 2/ at similar reduced densities. SF/sub 6/ was found to have lower ..pi..* parameters than Xe, although it has a greater polarizability. A change in the dependence of ..pi..* upon density was observed at reduced densities of 0.70 +/- 0.15 for all fluids studied.
Databáze:	OpenAIRE
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