title: Electro-fluorescence switching of bis-imidazolium ionic liquids.
abstract: Room-temperature ionic liquids (RTILs) containing bis-imidazolium salts were explored to control their optical properties of them in an organic device. The neat bis-imidazolium salts showed ionic conductivity of 3.5 x 10(-4) S/cm at room-temperature and the electrochemical window was exhibited within +/-2.5 V in a two electrode cell. The bis-imidazolium salts were transparent yellow and showed fluorescence upon excitation with light in the range of 360 to 500 nm. A two electrode organic ionic liquid cell was fabricated using a mixture of PEO200Blm-TFSI and electroactive molecules to control the emission property of the ionic liquid by electrochemical methods. The first example of the ionic liquid containing electro-fluorescence switch was explored with an electroactive benzyl viologen (BzV) blend of bis-imidazolium ionic liquid.
authors.affiliation: Department of Chemical Engineering, Yonsei University, Seodaemun-gu, Seoul, 120-749, Korea.
authors.forename: W R
authors.initials: WR
authors.lastname: Lee
authors.forename: Y
authors.initials: Y
authors.lastname: Kim
authors.forename: J Y
authors.initials: JY
authors.lastname: Kim
authors.forename: T H
authors.initials: TH
authors.lastname: Kim
authors.forename: K D
authors.initials: KD
authors.lastname: Ahn
authors.forename: E
authors.initials: E
authors.lastname: Kim
mesh_terms: D001594:Benzyl Viologen / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000494:pharmacology; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry; D007477:Ions; D008956:Models, Chemical; D055095:Optics and Photonics; D009930:Organic Chemicals; D011092:Polyethylene Glycols / Q000737:chemistry; D012492:Salts / Q000737:chemistry; D013053:Spectrophotometry; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D005456:Fluorescent Dyes; D007093:Imidazoles; D052578:Ionic Liquids; D007477:Ions; D009930:Organic Chemicals; D012492:Salts; D001594:Benzyl Viologen; D011092:Polyethylene Glycols