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X-ray photoelectron spectroscopy of pyridinium-based tonic liquids: comparison to imidazolium- and pyrrolidinium-based analogues

Men, S., Mitchell, D. S., Lovelock, K. R. J. and Licence, P. (2015) X-ray photoelectron spectroscopy of pyridinium-based tonic liquids: comparison to imidazolium- and pyrrolidinium-based analogues. ChemPhysChem, 16 (10). pp. 2211-2218. ISSN 1439-7641

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To link to this item DOI: 10.1002/cphc.201500227

Abstract/Summary

We investigate eight 1‐alkylpyridinium‐based ionic liquids of the form [CnPy][A] by using X‐ray photoelectron spectroscopy (XPS). The electronic environment of each element of the ionic liquids is analyzed. In particular, a reliable fitting model is developed for the C 1s region that applies to each of the ionic liquids. This model allows the accurate charge correction of binding energies and the determination of reliable and reproducible binding energies for each ionic liquid. Shake‐up/off phenomena are determinedfor both C 1s and N 1s spectra. The electronic interaction between cations and anions is investigated for both simple ionic liquids and an example of an ionic‐liquid mixture; the effect of the anion on the electronic environment of the cation is also explored. Throughout the study, a detailed comparison is made between [C8Py][A] and analogues including 1‐octyl‐1‐methylpyrrolidinium‐ ([C8C1Pyrr][A]), and 1‐octyl‐3‐methylimidazolium‐ ([C8C1Im][A]) based samples, where X is common to all ionic liquids.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:76266
Publisher:Wiley

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