460092-03-9Relevant articles and documents
Functional Electro-materials Based on Ferricyanide Redox-active Ionic Liquids
Doherty, Andrew P.,Graham, Louise,Wagner, Klaudia,Officer, David L.,Chen, Jun,Wallace, Gordon G.
, p. 934 - 940 (2017)
The unique physical and chemical properties of conventional room temperature ionic liquids (RTILs) render them highly deployable materials in electrochemical devices performing functions such as solvent-free electrolytes in capacitors, batteries and sensors. However, these non-faradaic applications can be complimented by incorporating faradaic redox functionality into the ionic liquid structure which facilitates access to a large array of new electrochemical applications such as dye sensitised solar cells, redox batteries, hydrid capacitors and selective amperometric sensor applications which are all reliant on heterogeneous or homogenous electron-transfer processes. This paper presents and discuses some examples of redox active ionic liquids base on the ferri-/ferro- functionality. These functional electro-materials which are already known [Ref. [18]] exhibit simple reversible one-electron electrochemistry at very negative potentials (by at least ?1?V relative to aqueous systems) in anhydrous media. Glass transition temperatures lower than ?50?°C were also observed along with an overall thermal stability up to at least 400?°C under dry N2 atmosphere conditions. Opportunities and challenges for these types of electro-materials are discussed.
Reduction of Carbon Dioxide to Formate at Low Overpotential Using a Superbase Ionic Liquid
Hollingsworth, Nathan,Taylor, S. F. Rebecca,Galante, Miguel T.,Jacquemin, Johan,Longo, Claudia,Holt, Katherine B.,De Leeuw, Nora H.,Hardacre, Christopher
, p. 14164 - 14168 (2015)
A new low-energy pathway is reported for the electrochemical reduction of CO2 to formate and syngas at low overpotentials, utilizing a reactive ionic liquid as the solvent. The superbasic tetraalkyl phosphonium ionic liquid [P66614][124Triz] is able to chemisorb CO2 through equimolar binding of CO2 with the 1,2,4-triazole anion. This chemisorbed CO2 can be reduced at silver electrodes at overpotentials as low as 0.17 V, forming formate. In contrast, physically absorbed CO2 within the same ionic liquid or in ionic liquids where chemisorption is impossible (such as [P66614][NTf2]) undergoes reduction at significantly increased overpotentials, producing only CO as the product.
Selective Single-Step Separation of a Mixture of Three Metal Ions by a Triphasic Ionic-Liquid-Water-Ionic-Liquid Solvent Extraction System
Vander Hoogerstraete, Tom,Blockx, Jonas,Decoster, Hendrik,Binnemans, Koen
, p. 11757 - 11766 (2015)
In a conventional solvent extraction system, metal ions are distributed between two immiscible phases, typically an aqueous and an organic phase. In this paper, the proof-of-principle is given for the distribution of metal ions between three immiscible phases, two ionic liquid phases with an aqueous phase in between them. Three-liquid-phase solvent extraction allows separation of a mixture of three metal ions in a single step, whereas at least two steps are required to separate three metals in the case of two-liquid-phase solvent extraction. In the triphasic system, the lower organic phase is comprised of the ionic liquid betainium- or choline bis(trifluoromethylsulfonyl)imide, whereas the upper organic phase is comprised of the ionic liquid trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)imide. The triphasic system was used for the separation of a mixture of tin(II), yttrium(III), and scandium(III) ions. Triple crown: A novel triphasic extraction system for the separation of metals consisting of two ionic liquids and an aqueous phase is presented. The triphasic system allows the separation of three metals in one single step, whereas at least two steps are necessary to separate three metals in conventional biphasic extraction systems.
Dissolution of oligo(tetrafluoroethylene) and preparation of poly(tetrafluoroethylene)-based composites by using fluorinated ionic liquids
Tsurumaki, Akiko,Ohno, Hiroyuki
supporting information, p. 409 - 412 (2018/02/27)
Fluorophilic ionic liquids (ILs) showing enhanced compatibility with poly(tetrafluoroethylene) (PTFE) have been newly synthesised. The as-designed ILs contributed both to the dissolution of PTFE oligomers and to the preparation of composites with PTFE with no fear of bleed-out of the ILs.
