N-methyl-N-alkylpyrrolidinium bis(perfluoroethylsulfonyl)amide ([NPf2]–) and tris(trifluoromethanesulfonyl)methide ([CTf3]–) salts : synthesis and characterization
Data(s) |
01/01/2007
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Resumo |
Novel salts based the pyrrolidinium cation [C<sub><i>n</i></sub>mpyr]<sup>+</sup> (where n denote the number of carbons in the straight alkyl chain) and either the [NPf<sub>2</sub>]<sup>–</sup> or [CTf<sub>3</sub>]<sup>–</sup> anions have been synthesized and characterized to determine their thermal behaviour, stability, and conductivity. [C<sub>1</sub>mpyr][NPf<sub>2</sub>], [C<sub>2</sub>mpyr][NPf<sub>2</sub>], and [C<sub>1</sub>mpyr][CTf<sub>3</sub>] exhibit behaviour indicative of a plastic crystal phase. Both [C<sub>3</sub>mpyr][NPf<sub>2</sub>] and [C<sub>4</sub>mpyr][NPf<sub>2</sub>] are RTILs, while all of the [CTf<sub>3</sub>]<sup>– </sup>salts, have melting points above 60°C. [C<sub>3</sub>mpyr][NPf<sub>2</sub>] exhibited the widest electrochemical window of 5.5 V. The [NPf2]– salt exhibited similar reductive limits to the [NTf<sub>2</sub>]<sup>–</sup> anion, –3.2 V versus Fc<sup>+</sup>|Fc, while [CTf<sub>3</sub>]<sup>–</sup> had lower reductive stability. The [CTf<sub>3</sub>]<sup>–</sup> salts were more stable towards oxidation, +2.5 V versus Fc<sup>+</sup>|Fc, compared to the [NPf<sub>2</sub>]<sup>–</sup> and [NTf<sub>2</sub>]<sup>–</sup> salts.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
CSIRO |
Relação |
http://dro.deakin.edu.au/eserv/DU:30030175/forsyth-nmethyln-2007.pdf http://dx.doi.org/10.1071/CH06299 |
Direitos |
2007, CSIRO |
Tipo |
Journal Article |