X-ray photoelectron spectroscopy of trihalide ionic liquids: comparison to halide-based analogues, anion basicity and beam damage

Men, Shuang; Lovelock, Kevin; Licence, Peter

Abstract

X-ray photoelectron spectroscopy is used to investigate two 1-octyl-3-methylimidazolium trihalide ionic liquids, with anions including triiodide and iododibromide. The electronic environment of each element present in ionic liquids studied herein is analysed and compared to their halide-based analogous. The anion basicity is compared based upon the measured N 1s binding energy. The iododibromide ionic liquid is studied as a representative sample to illustrate the beam damage effect. Due to the beam damage, there is a new formed bromine component observed. This effect is calculated and demonstrated for all elements present within the ionic liquid. It suggests that the beam induced decomposition caused a stoichiometric loss of bromine atom and iodine atom.

Citation

Men, S., Lovelock, K., & Licence, P. (2017). X-ray photoelectron spectroscopy of trihalide ionic liquids: comparison to halide-based analogues, anion basicity and beam damage. Chemical Physics Letters, 679, https://doi.org/10.1016/j.cplett.2017.05.010

• Journal Article Type: Article
• Acceptance Date: May 3, 2017
• Online Publication Date: May 5, 2017
• Publication Date: Jul 1, 2017
• Deposit Date: Sep 7, 2017
• Publicly Available Date: Sep 7, 2017
• Journal: Chemical Physics Letters
• Print ISSN: 0009-2614
• Electronic ISSN: 0009-2614
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 679
• DOI: https://doi.org/10.1016/j.cplett.2017.05.010
• Keywords: Ionic liquids, Anion basicity, Bromine component, Beam induced decomposition
• Public URL: https://nottingham-repository.worktribe.com/output/869719
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0009261417304487
• Contract Date: Sep 7, 2017