Ion fragmentation study of [EMMIM][TFSI], [EMIM][OTf] and [EMIM][DCA] by vacuum ultraviolet light
(2022) In International Journal of Mass Spectrometry 471.- Abstract
The ionic liquids (ILs) 1-Ethyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide [EMMIM][TFSI], 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate [EMIM][OTf] and 1-Ethyl-3-methylimidazolium dicyanamide [EMIM][DCA] were evaporated by effusion and a time-of-flight (TOF) instrument was employed as the mass analyzer while vacuum ultraviolet (VUV) light in the energy range 9–20 eV was used to excite the IL molecules. Fragmentation patterns with respect to excitation energy are discussed and decomposition products are analyzed. Hydrogenated and dehydrogenated fragments are discussed. Our experiment seems to show that the ionic liquids with larger anions have less cation fragmentation. [EMMIM][TFSI] was studied for the first time... (More)
The ionic liquids (ILs) 1-Ethyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide [EMMIM][TFSI], 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate [EMIM][OTf] and 1-Ethyl-3-methylimidazolium dicyanamide [EMIM][DCA] were evaporated by effusion and a time-of-flight (TOF) instrument was employed as the mass analyzer while vacuum ultraviolet (VUV) light in the energy range 9–20 eV was used to excite the IL molecules. Fragmentation patterns with respect to excitation energy are discussed and decomposition products are analyzed. Hydrogenated and dehydrogenated fragments are discussed. Our experiment seems to show that the ionic liquids with larger anions have less cation fragmentation. [EMMIM][TFSI] was studied for the first time and it produces different fragments than 1-Ethyl-3-methylimidazolium based ionic liquids. Surprisingly 1-Ethyl-3-methylimidazolium or 1-Ethyl-2-methylimidazolium cations were not detected in the [EMMIM][TFSI] fragmentation pattern.
(Less)
- author
- Kook, M. ; Kuusik, I. ; Pärna, R. ; Käämbre, T. ; Kikas, A. ; Tõnisoo, A. ; Kahk, J. M. ; Kivimäki, A. LU ; Reisberg, L. and Kisand, V.
- organization
- publishing date
- 2022-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ionic liquids, Time-of-flight mass spectrometry, [EMIM][DCA], [EMIM][OTf], [EMMIM][TFSI]
- in
- International Journal of Mass Spectrometry
- volume
- 471
- article number
- 116732
- publisher
- Elsevier
- external identifiers
-
- scopus:85117816252
- ISSN
- 1387-3806
- DOI
- 10.1016/j.ijms.2021.116732
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021
- id
- 683aeb6b-d028-40b3-ae4f-fcdd651a7957
- date added to LUP
- 2021-11-12 12:56:15
- date last changed
- 2022-04-19 17:44:39
@article{683aeb6b-d028-40b3-ae4f-fcdd651a7957, abstract = {{<p>The ionic liquids (ILs) 1-Ethyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide [EMMIM][TFSI], 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate [EMIM][OTf] and 1-Ethyl-3-methylimidazolium dicyanamide [EMIM][DCA] were evaporated by effusion and a time-of-flight (TOF) instrument was employed as the mass analyzer while vacuum ultraviolet (VUV) light in the energy range 9–20 eV was used to excite the IL molecules. Fragmentation patterns with respect to excitation energy are discussed and decomposition products are analyzed. Hydrogenated and dehydrogenated fragments are discussed. Our experiment seems to show that the ionic liquids with larger anions have less cation fragmentation. [EMMIM][TFSI] was studied for the first time and it produces different fragments than 1-Ethyl-3-methylimidazolium based ionic liquids. Surprisingly 1-Ethyl-3-methylimidazolium or 1-Ethyl-2-methylimidazolium cations were not detected in the [EMMIM][TFSI] fragmentation pattern.</p>}}, author = {{Kook, M. and Kuusik, I. and Pärna, R. and Käämbre, T. and Kikas, A. and Tõnisoo, A. and Kahk, J. M. and Kivimäki, A. and Reisberg, L. and Kisand, V.}}, issn = {{1387-3806}}, keywords = {{Ionic liquids; Time-of-flight mass spectrometry; [EMIM][DCA]; [EMIM][OTf]; [EMMIM][TFSI]}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{International Journal of Mass Spectrometry}}, title = {{Ion fragmentation study of [EMMIM][TFSI], [EMIM][OTf] and [EMIM][DCA] by vacuum ultraviolet light}}, url = {{http://dx.doi.org/10.1016/j.ijms.2021.116732}}, doi = {{10.1016/j.ijms.2021.116732}}, volume = {{471}}, year = {{2022}}, }