title: Magnetic ionic plastic crystal: choline[FeCl4].
abstract: A novel organic ionic plastic crystal (OIPC) based on a quaternary ammonium cation and a tetrachloroferrate anion has been synthesized with the intention of combining the properties of the ionic plastic crystal and the magnetism originating from the iron incorporated in the anion. The thermal analysis of the obtained OIPC showed a solid-solid phase transition below room temperature and a high melting point above 220 °C, indicating their plastic crystalline behaviour over a wide temperature range, as well as thermal stability up to approximately 200 °C. The magnetization measurements show the presence of three-dimensional antiferromagnetic ordering below 4 K. The results from electrochemical characterization display a solid-state ionic conduction sufficiently high and stable (between 10(-2.7) and 10(-3.6) S cm(-1) from 20 to 180 °C) for electrochemical applications.
authors.affiliation: CITIMAC & MAGMA, Unidad Asociada-CSIC Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain. depedrovm@unican.es
authors.forename: I
authors.initials: I
authors.lastname: de Pedro
authors.forename: A
authors.initials: A
authors.lastname: García-Saiz
authors.forename: J
authors.initials: J
authors.lastname: González
authors.forename: I
authors.initials: I
authors.lastname: Ruiz de Larramendi
authors.forename: T
authors.initials: T
authors.lastname: Rojo
authors.forename: Carlos A M
authors.initials: CA
authors.lastname: Afonso
authors.forename: Svilen P
authors.initials: SP
authors.lastname: Simeonov
authors.forename: J C
authors.initials: JC
authors.lastname: Waerenborgh
authors.forename: Jesús A
authors.initials: JA
authors.lastname: Blanco
authors.forename: B
authors.initials: B
authors.lastname: Ramajo
authors.forename: J Rodríguez
authors.initials: JR
authors.lastname: Fernández
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry; D002794:Choline / Q000737:chemistry*; D003460:Crystallization; D058266:Dielectric Spectroscopy; D005296:Ferrous Compounds / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D044367:Phase Transition; D013816:Thermodynamics; D044366:Transition Temperature
chemical_list: D064751:Ammonium Compounds; D005296:Ferrous Compounds; D007477:Ions; C017311:ferrate ion; D007501:Iron; D002794:Choline; C029451:ferrous chloride