title: Ionic liquids based on quaternary phosphonium cation as active components of solid-state iodide selective electrode.
abstract: The two ionic liquids (ILs) which melt above room temperature were used as active components of solid-state ion-selective electrodes (ISEs). The both ILs are composed of quaternary phosphonium cation and fluorinated anion, namely bis(trifluoromethylsulfonyl)imide and hexafluorophosphate. Molten and then solidified ILs were used to cover solid-state screen printed electrodes with an ion-sensing layer. The sensors show the response towards iodide. The addition of tetrakis(tert-butyl)phthalocyaninatocobalt (III) iodide to ion-sensing composition significantly improved the operational characteristics. The resulting ISE demonstrates good sensitivity and detection limit: S=-(58.0 ± 0.8) mV/dec, C(min)=6 × 10(-5)М; response time is ca. 15s. A high selectivity towards iodide over number anions is observed. The ISE could be used for at least a month without any deterioration of signal.
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1 buil. 3 Leninskiye Gory, 119991 Moscow, Russian Federation.
authors.forename: Natalya V
authors.initials: NV
authors.lastname: Shvedene
authors.forename: Aleksandra V
authors.initials: AV
authors.lastname: Rzhevskaia
authors.forename: Igor V
authors.initials: IV
authors.lastname: Pletnev
mesh_terms: D002412:Cations / Q000737:chemistry; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D007454:Iodides / Q000737:chemistry*; D017736:Ion-Selective Electrodes; D052578:Ionic Liquids / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*
chemical_list: D002412:Cations; D006845:Hydrocarbons, Fluorinated; D007454:Iodides; D052578:Ionic Liquids; D009943:Organophosphorus Compounds