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X-ray Photoelectron Spectroscopy of Pyridinium-Based Ionic Liquids: Comparison to Imidazolium- and Pyrrolidinium-Based Analogues

Title: X-ray Photoelectron Spectroscopy of Pyridinium-Based Ionic Liquids: Comparison to Imidazolium- and Pyrrolidinium-Based Analogues
Author(s): Men, S
Mitchell, DS
Lovelock, KRJ
Licence, P
Item Type: Journal Article
Abstract: 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.
Publication Date: 7-May-2015
Date of Acceptance: 1-May-2015
URI: http://hdl.handle.net/10044/1/41152
DOI: http://dx.doi.org/10.1002/cphc.201500227
ISSN: 1439-7641
Publisher: Wiley-VCH Verlag
Start Page: 2211
End Page: 2218
Journal / Book Title: Chemphyschem
Volume: 16
Issue: 10
Copyright Statement: © 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/K039946/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Physical
Physics, Atomic, Molecular & Chemical
Chemistry
Physics
binding energy
fitting model
ionic liquids
pyridinium
X-ray photoelectron spectroscopy
CATION-ANION INTERACTIONS
SURFACE-COMPOSITION
ELECTRONIC ENVIRONMENT
IN-VACUO
SHAKE-UP
XPS
SPECTRA
DECOMPOSITION
SUBSTITUENTS
TRANSITION
X-ray photoelectron spectroscopy
binding energy
fitting model
ionic liquids
pyridinium
Chemical Physics
0306 Physical Chemistry (Incl. Structural)
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
0307 Theoretical And Computational Chemistry
Publication Status: Published
Appears in Collections:Chemistry
Faculty of Natural Sciences



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