Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 216, Issue -, Pages 246-258Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2016.01.011
Keywords
Ionic liquids; Perfluoroalkyl-substituents; Surface properties; Contact angle; High-precision drop shape analysis
Funding
- Deutsche Bundesstiftung Umwelt (DBU) [31925-41]
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A series of 1-(1H,1H,2H,2H-perfluoroalkyl-)-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide ionic liquids with varying lengths of the perfluorinated side chain was synthesized and some of their important physical properties were compared to their non-fluorinated analogs. They were found to have a high thermal stability, wide liquid range and higher or comparable polarities. Furthermore evidences for the formation of fluorous domains in the bulk ionic liquids were found. Their contact angles on various substrates were determined using the high-precision drop shape analysis (HPDSA) approach and were found to show a greatly modified behavior on all investigated surfaces. (C) 2016 Elsevier B.V. All rights reserved.
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