title: Structure and dynamics in protic ionic liquids: a combined optical Kerr-effect and dielectric relaxation spectroscopy study.
abstract: The structure and dynamics of ionic liquids (ILs) are unusual due to the strong interactions between the ions and counter ions. These microscopic properties determine the bulk transport properties critical to applications of ILs such as advanced fuel cells. The terahertz dynamics and slower relaxations of simple alkylammonium nitrate protic ionic liquids (PILs) are here studied using femtosecond optical Kerr-effect spectroscopy, dielectric relaxation spectroscopy, and terahertz time-domain spectroscopy. The observed dynamics give insight into more general liquid behaviour while comparison with glass-forming liquids reveals an underlying power-law decay and relaxation rates suggest supramolecular structure and nanoscale segregation.
authors.affiliation: School of Chemistry and WestCHEM, University of Glasgow, Glasgow, G12 8QQ, UK. david.turton@glasgow.ac.uk
authors.forename: David A
authors.initials: DA
authors.lastname: Turton
authors.forename: Thomas
authors.initials: T
authors.lastname: Sonnleitner
authors.forename: Alex
authors.initials: A
authors.lastname: Ortner
authors.forename: Markus
authors.initials: M
authors.lastname: Walther
authors.forename: Glenn
authors.initials: G
authors.lastname: Hefter
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Seddon
authors.forename: Simona
authors.initials: S
authors.lastname: Stana
authors.forename: Natalia V
authors.initials: NV
authors.lastname: Plechkova
authors.forename: Richard
authors.initials: R
authors.lastname: Buchner
authors.forename: Klaas
authors.initials: K
authors.lastname: Wynne
mesh_terms: D058266:Dielectric Spectroscopy; D052578:Ionic Liquids / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D015394:Molecular Structure; D013059:Spectrum Analysis, Raman
chemical_list: D052578:Ionic Liquids