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N-methyl-N-alkylpyrrolidinium bis(perfluoroethylsulfonyl)amide ([NPf2]–) and tris(trifluoromethanesulfonyl)methide ([CTf3]–) salts : synthesis and characterization
journal contribution
posted on 2007-01-01, 00:00 authored by K Johansson, J Adebahr, Patrick HowlettPatrick Howlett, Maria ForsythMaria Forsyth, D MacFarlaneNovel salts based the pyrrolidinium cation [Cnmpyr]+ (where n denote the number of carbons in the straight alkyl chain) and either the [NPf2]– or [CTf3]– anions have been synthesized and characterized to determine their thermal behaviour, stability, and conductivity. [C1mpyr][NPf2], [C2mpyr][NPf2], and [C1mpyr][CTf3] exhibit behaviour indicative of a plastic crystal phase. Both [C3mpyr][NPf2] and [C4mpyr][NPf2] are RTILs, while all of the [CTf3]– salts, have melting points above 60°C. [C3mpyr][NPf2] exhibited the widest electrochemical window of 5.5 V. The [NPf2]– salt exhibited similar reductive limits to the [NTf2]– anion, –3.2 V versus Fc+|Fc, while [CTf3]– had lower reductive stability. The [CTf3]– salts were more stable towards oxidation, +2.5 V versus Fc+|Fc, compared to the [NPf2]– and [NTf2]– salts.
History
Journal
Australian journal of chemistryVolume
60Issue
1Pagination
57 - 63Publisher
CSIROLocation
Melbourne, Vic.Publisher DOI
ISSN
0004-9425eISSN
1445-0038Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2007, CSIROUsage metrics
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