Using XPS to determine solute solubility in room temperature ionic liquids |
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| Authors: | Silvester Debbie S Broder Tessa L Aldous Leigh Hardacre Christopher Crossley Alison Compton Richard G |
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| Affiliation: | Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, UKOX1 3QZ. |
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| Abstract: | X-Ray Photoelectron Spectroscopy (XPS) was used to quantify the amount of bromide ions present in two samples of [C(4)mpyrr]Br dissolved in the room temperature ionic liquid (RTIL) [C(4)mpyrr][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. |
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