Ionic liquids and solids with paramagnetic anions

Brenna M. Krieger, Heather Y. Lee, Thomas J. Emge, James F. Wishart, Edward W. Castner

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Four paramagnetic ionic compounds have been prepared and their magnetic, structural and thermal properties have been investigated. The four compounds are methylbutylpyrrolidinium tetrachloroferrate(iii) ([Pyrr14] +/[FeCl4]-), methyltributylammonium tetrachloroferrate(iii) ([N1444]+/[FeCl4] -), butylmethylimidazolium tetrachloroferrate(iii) ([bmim] +/[FeCl4]-) and tetrabutylammonium bromotrichloroferrate(iii) ([N4444]+/[FeBrCl 3]-). Temperature-dependent studies of their magnetic behaviors show that all four compounds are paramagnetic at ambient temperatures. Glass transitions are observed for only two of the four compounds, [Pyrr 14]+/[FeCl4]- and [bmim] +/[FeCl4]-. Crystal structures for [Pyrr 14]+/[FeCl4]- and [N 1444]+/[FeCl4]- are compared with the previously reported [N4444]+/[FeBrCl3] -.

Original languageEnglish
Pages (from-to)8919-8925
Number of pages7
JournalPhysical Chemistry Chemical Physics
Issue number31
Publication statusPublished - Aug 21 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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