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2. Using XPS to determine solute solubility in room temperature ionic liquids.

Author

Debbie S. Silvester, Tessa L. Broder, Leigh Aldous, Christopher Hardacre, Alison Crossley, and Richard G. Compton

Subjects
X-ray photoelectron spectroscopy, BROMIDE ions, SOLUBILITY, TEMPERATURE
Abstract

X-Ray Photoelectron Spectroscopy (XPS) was used to quantify the amount of bromide ions present in two samples of [C4mpyrr]Br dissolved in the room temperature ionic liquid (RTIL) [C4mpyrr][N(Tf)2]. One sample was of a known concentration (0.436 Br atom%); the other was a saturated solution. The results obtained from quantitative XPS analysis indicated that the saturated sample had a concentration, or solubility, of 0.90 Br atom% (746 mM) at 298 K, which was then independently confirmed by potential-step chronoamperometry of the same solution. [ABSTRACT FROM AUTHOR]

Published
2007
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