1 -Ethyl-3-methylimidazolium trifluoromethanesulfonate

Sekiguchi et al. [46] have reported the recycling and re-use of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, [C2mim][OTf], after poly (pyrrole) synthesis by extraction of the unreacted monomer with chloroform. The ionic liquid was reused five times with little change in the growth CVs of the polymer. 

Burba, C.M., Rocher, N.M., Freeh, R. and Powell, D.R., Cation-anion interactions in 1-ethyl-3-methylimidazolium trifluoromethanesulfonate-based ionic liquid electrolytes, J. Phys. Chem. B 112 (10), 2991-2995 (2008). 

C7H11F3N2O3S + 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate EVLM 1211 LB4646... 

Orchilles, A. V. Miguel, P. J. Vercher, E. Martinez-Andreu, A. Isobaric vapor-hquid equilibria for methyl acetate + methanol + 1-ethyl-3-methylimidazolium trifluoromethanesulfonate at 100 kPa. J. Chem. Eng. Data 2007, 52, 915-920. 

Recently, there has been considerable interest in developing molten salts that are less air and moisture sensitive. Melts such as l-methyl-3-butylimidazolium hexa-fluorophosphate [211], l-ethyl-3-methylimidazolium trifluoromethanesulfonate [212], and l-ethyl-3-methylimidazolium tetrafluoroborate [213] are reported to be hydro-phobic and stable under environmental conditions. In some cases, metal deposition from these electrolytes has been explored [214]. They possess a wide potential window and sufficient ionic conductivity to be considered for many electrochemical applications. Of course if one wishes to take advantage of their potential air stability, one loses the opportunity to work with the alkali and reactive metals. Further, since these ionic liquids are neutral and lack the adjustable Lewis acidity common to the chloroaluminates, the solubility of transition metal salts into these electrolytes may be limited. On a positive note, these electrolytes are significantly different from the chloroaluminates in that the supporting electrolyte is not intended to be electroactive. 

Kosmuiski. M., Granqvist, B., and Rosenholm, J.B.. Electrokinetics of anatase in l-ethyl-3-methylimidazolium trifluoromethanesulfonate. Colloids Surf. A, 254,179, 2005. 

Sekiguchi, K., Atobe, M., and Fuchigami, T. (2003). Electrooxidative polymerization of aromatic compounds in l-ethyl-3-methylimidazolium trifluoromethanesulfonate room-temperature ionic liquid./. Electroanal. Chem., 557, pp. 1-7. 

Catalytic oxidation of beech organosolv lignin in ionic liquid (l-ethyl-3-methylimidazolium trifluoromethanesulfonate) at 100°C and 8 MPa air in the presence of 20% Mn(N03)2 formed DMBQ 25 in 11.5% isolated yield and 21% selectivity. The amount of 25 formed under these conditions depended on the catalyst level. At 2% catalyst, the product slate shifted to a mixture of syringaldehyde, syringyl alcohol, and vanillin, with only trace amounts of DMBQ observed. The authors propose that DMBQ results from syringaldehyde oxidation [100]. 

Ionic liquids l-ethyl-3-methylimidazolium diethylphosphate EMIMDEP, l-butyl-3-methylimidazolium hexafluorophosphate EMIMPF6, l-hexyl-3-methylitnidazolium chloride HMIMCl, l-butyl-3-methylimidazolium trifluoromethanesulfonate BMIM OTf, l-butyl-3-methylimidazolium tetrafluoroborate EMIMEF4, trihexyltetradecylphosphonium chloride HPCl, and l-butyl-3-methylimidazolium chloride EMIMCl were sup>plied by Alrdich. Composition of a typical elastomer mixture rubber - 100 phr, DCP - 2 phr, TAC - 0.5 phr, ZnO - 5 phr, MET - 2 phr, S - 2 phr, Ionic liquids - 3 phr, filler 20-100 phr. 

Lin, P.-Y. Soriano, A. N. Caparanga A.R. Li, M. -H. (2009). Electrolytic conductivity and molar heat capacity of the solvent system l-ethyl-3- methylimidazolium ethylsulfate + water and l-ethyl-3-methylimidazolium trifluoromethanesulfonate + water. Thermochim. Acta 496,1 (December 2009) 105-109. 

Olivier, E. Letcher, T. M. Naidoo, P. Ramjugernath, D. (2010). Activity coefficients at infinite dilution of organic solutes in the ionic liquid l-ethyl-3-methylimidazolium trifluoromethanesulfonate using gas-liquid chromatography at T = (313.15, 323.15, and 333.15) K. /, Chem, Thermodyn, 42, 78-83. 

Figure 5 The Ionic Liquid l-Ethyl-3-Methylimidazolium Trifluoromethanesulfonate...

A solid-state solar cell was assembled with an ionic liquid—l-ethyl-3-methylimidazolium bis(trifluoromethanesulfone)amide (EMITFSA) containing 0.2 M lithium bis(trifluoromethanesulfone)amide and 0.2 M 4-tert-butylpyridine—as the electrolyte and Au or Pt sputtered film as the cathode.51,52 The in situ PEP of polypyrrole and PEDOT allows efficient hole transport between the ruthenium dye and the hole conducting polymer, which was facilitated by the improved electronic interaction of the HOMO of the ruthenium dye and the conduction band of the hole transport material. The best photovoltaic result ( 7p=0.62 %, 7SC=104 pA/cm2, FOC=0.716 V, and FF=0.78) was obtained from the ruthenium dye 5 with polypyrrole as the hole transport layer and the carbon-based counterelectrode under 10 mW/cm2 illumination. The use of carbon-based materials has improved the electric connectivity between the hole transport layer and the electrode.51... 

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