Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy
A series of highly pure 1-alkyl-3-methylimidazolium hexafluoroantimonate (V) ionic liquids was firstly investigated by XPS. Reliable binding energy values for all elements within the samples were obtained by applying a C 1s fitting model previously employed for other imidazolium ionic liquids, based...
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| Format: | Article |
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American Chemical Society
2016
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| Online Access: | https://eprints.nottingham.ac.uk/35933/ |
| _version_ | 1848795193001639936 |
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| author | Longo Jr, Luiz S. Smith, Emily F. Licence, Peter |
| author_facet | Longo Jr, Luiz S. Smith, Emily F. Licence, Peter |
| author_sort | Longo Jr, Luiz S. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A series of highly pure 1-alkyl-3-methylimidazolium hexafluoroantimonate (V) ionic liquids was firstly investigated by XPS. Reliable binding energy values for all elements within the samples were obtained by applying a C 1s fitting model previously employed for other imidazolium ionic liquids, based on setting the C 1s aliphatic component to 285.0 eV when alkyl chains are longer than 8 carbons. We also observed a straightforward X-ray-mediated photoreduction of Sb (V) to Sb (III) species, i.e. reduction of [SbF6]- anion to volatile SbF3. Thus, binding energies values observed at 542.5 eV and 533.1 eV were attributed to Sb 3d3/2 (V) and Sb 3d5/2 (V), respectively, whereas values at 541.0 eV and 531.7 eV were found for Sb 3d3/2 (III) and Sb 3d5/2 (III), respectively. The SbF3 being formed can be lost either by evaporation and/or redistribution to the bulk. Providing the sample is cooled to freezing temperatures, the SbF3 is prevented from escaping the ionic liquid and it accumulated on the surface of cooled [C4C1Im][SbF6] and [C8C1Im][SbF6]. Particularly in the case of prolonged X-ray exposure of a cooled [C4C1Im][SbF6], an unprecedented further reduction of Sb (III) to Sb (0) was noticed. This study provides fundamental knowledge on the XPS data for antimony compounds as well as providing a step towards the surface analysis of materials composed by antimony species, notably the hexafluoroantimonate (V) anion. |
| first_indexed | 2025-11-14T19:28:11Z |
| format | Article |
| id | nottingham-35933 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:28:11Z |
| publishDate | 2016 |
| publisher | American Chemical Society |
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| spelling | nottingham-359332020-05-04T18:07:27Z https://eprints.nottingham.ac.uk/35933/ Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy Longo Jr, Luiz S. Smith, Emily F. Licence, Peter A series of highly pure 1-alkyl-3-methylimidazolium hexafluoroantimonate (V) ionic liquids was firstly investigated by XPS. Reliable binding energy values for all elements within the samples were obtained by applying a C 1s fitting model previously employed for other imidazolium ionic liquids, based on setting the C 1s aliphatic component to 285.0 eV when alkyl chains are longer than 8 carbons. We also observed a straightforward X-ray-mediated photoreduction of Sb (V) to Sb (III) species, i.e. reduction of [SbF6]- anion to volatile SbF3. Thus, binding energies values observed at 542.5 eV and 533.1 eV were attributed to Sb 3d3/2 (V) and Sb 3d5/2 (V), respectively, whereas values at 541.0 eV and 531.7 eV were found for Sb 3d3/2 (III) and Sb 3d5/2 (III), respectively. The SbF3 being formed can be lost either by evaporation and/or redistribution to the bulk. Providing the sample is cooled to freezing temperatures, the SbF3 is prevented from escaping the ionic liquid and it accumulated on the surface of cooled [C4C1Im][SbF6] and [C8C1Im][SbF6]. Particularly in the case of prolonged X-ray exposure of a cooled [C4C1Im][SbF6], an unprecedented further reduction of Sb (III) to Sb (0) was noticed. This study provides fundamental knowledge on the XPS data for antimony compounds as well as providing a step towards the surface analysis of materials composed by antimony species, notably the hexafluoroantimonate (V) anion. American Chemical Society 2016-08-09 Article PeerReviewed Longo Jr, Luiz S., Smith, Emily F. and Licence, Peter (2016) Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy. ACS Sustainable Chemistry and Engineering . ISSN 2168-0485 http://pubs.acs.org/doi/abs/10.1021/acssuschemeng.6b00919 doi:10.1021/acssuschemeng.6b00919 doi:10.1021/acssuschemeng.6b00919 |
| spellingShingle | Longo Jr, Luiz S. Smith, Emily F. Licence, Peter Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title | Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title_full | Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title_fullStr | Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title_full_unstemmed | Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title_short | Study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(V) based ionic liquids using xray photoelectron spectroscopy |
| title_sort | study of the stability of 1alkyl-3-methylimidazolium hexafluoroantimonate(v) based ionic liquids using xray photoelectron spectroscopy |
| url | https://eprints.nottingham.ac.uk/35933/ https://eprints.nottingham.ac.uk/35933/ https://eprints.nottingham.ac.uk/35933/ |