Showing papers on "Ionic liquid published in 1992"
TL;DR: A series of novel air and water stable low melting salts based upon the 1-ethyl-3methylimidazolium cation (EtMeim+) have been prepared and characterized.
Abstract: A series of novel air and water stable low melting salts based upon the 1-ethyl-3-methylimidazolium cation (EtMeim+) have been prepared and characterized; two salts, [EtMeim]BF4 and [EtMeim]MeCO2, are liquids under ambient conditions.
1,561 citations
TL;DR: A series of novel air and water stable low melting salts based upon the 1-ethyl-3methylimidazolium cation (EtMeim+) have been prepared and characterized as discussed by the authors.
Abstract: A series of novel air and water stable low melting salts based upon the 1-ethyl-3-methylimidazolium cation (EtMeim+) have been prepared and characterized; two salts, [EtMeim]BF4 and [EtMeim]MeCO2, are liquids under ambient conditions.
121 citations
TL;DR: The reaction of sodium β-naphthoxide with benzyl halides in molten tetraalkylammonium or phosphonium halides (at 110°C or below) leads to a highly regioselective O-alkylation as discussed by the authors.
64 citations
TL;DR: In this paper, the rotational correlation time of tempamine was ca. 27 times longer than for tempo in ionic liquids composed of 1-ethyl-3methylimidazolium chloride, ImCl, and aluminium chloride.
Abstract: EPR spectra of 2,2,6,6-tetramethylpiperidine-1-oxyl (tempo) and of 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl (tempamine) were obtained in ionic liquids composed of 1-ethyl-3-methylimidazolium chloride, ImCl, and aluminium chloride and in mineral oil. In basic solutions, those containing a molar excess of ImCl, the rotational correlation time of tempamine was ca. 27 times longer than for tempo. This is probably the result of a specific interaction of melt species with the basic NH 2 moiety of tempamine
55 citations
TL;DR: In this paper, the basic theory and first experimental results of a new microfabricated ionic liquid-channel field effect transistor (ILCFET) are presented, which resembles a metal-oxide-semiconductor field-effect transistor (MOSFET).
Abstract: The basic theory and first experimental results of a new microfabricated ionic liquid-channel field-effect transistor (ILCFET) are presented. The ILCFET resembles a metal-oxide-semiconductor field-effect transistor (MOSFET) except the the current flowing form the source to the drain is carried in thin channels by ions of a liquid electrolyte. In MOSFETs the gate-induced electric field changes the channel concentration of only one mobile carrier, the holes or the electrons. In ILCFETs the concentrations of both cations and anions are altered
49 citations
TL;DR: Proton speciation in ambient-temperature chloroaluminate ionic liquids, composed of 1-ethyl-3-methylimidazolium chloride (ImCl) and aluminum chloride has been examined by 2 H NMR and FT-IR spectroscopies as mentioned in this paper.
Abstract: Proton speciation in ambient-temperature chloroaluminate ionic liquids, composed of 1-ethyl-3-methylimidazolium chloride (ImCl) and aluminum chloride has been examined by 2 H NMR and FT-IR spectroscopies. In oxide free basic melts (excess ImCl), two proton-containing species, HCl and HCl 2 - , exist which are in an equilibrium that strongly favors the formation of the dichloride ion. In oxide free acidic melts (excess AlCl 3 ) HCl is the only proton-containing species.
40 citations
TL;DR: In this article, the role of doping of macromolecules generated in the process of poly(p-phenylene) synthesis has been investigated and a hypothesis which considers the role and effect of doping on the structure and relative molecular mass of the samples has been proposed.
Abstract: Flexible transparent high-molecular-weight (degree of polymerization higher than 90) films of poly(p-phenylene) were obtained by electrochemical polymerization of benzene in an aluminium chloride and N-butylpyridinium chloride based ionic liquid. Effects of the process parameters on the structure and relative molecular mass of the samples were studied. A hypothesis which considers the role of doping of macromolecules generated in the process of the polymer synthesis, is proposed.
27 citations
TL;DR: An ionic liquid based on aluminum chloride and butylpyridinium chloride has been used as the solvent for the chemical synthesis of poly(p-phenylene) as mentioned in this paper.
Abstract: An ionic liquid based on aluminum chloride and butylpyridinium chloride has been used as the solvent for the chemical synthesis of poly(p-phenylene).
23 citations
22 citations
TL;DR: In this article, the first and second oxidation of anthracene, the kinetics of the Fe(III)/Fe(II) chloro-complex heterogenous electron transfer, and the electrochemical chemical mechanism of Ti(YI) oxychlorocomplex reduction were studied.
Abstract: Pulse voltammetry experiments with pulse times as short as 10μs were utilized for the st udy of electrochemical processes in ambient temperature chloroamuminate ionic liquids. The electrochemical processes studied were the first and second oxidation of anthracene, the kinetics of the Fe(III)/Fe(II) chloro-complex heterogenous electron transfer, and the electrochemical chemical mechanism of Ti(YI) oxychlorocomplex reduction. The working electrode was sa Pt disk, whose didameter was 26 μm.
4 citations
TL;DR: In this paper, the component of the liquid-junction potential due to the diffusion of ions across an interface of electrolyte solutions in different solvents was formulated by taking into account the solvent dependence of the transport numbers, t, and of the chemical potentials of ions in the interphase region as determined from experimental data on their variation in the mixed-solvent compositions.
Abstract: The component of the liquid-junction potential due to the diffusion of ions across an interface of electrolyte solutions in different solvents was formulated by taking into account the solvent dependence of the transport numbers, t, and of the chemical potentials of ions in the interphase region as determined from experimental data on their variation in the mixed-solvent compositions. The new equation was applied to NaCl/NaCl and HCl/HCl junctions between water and methanol-water solvents over the entire solvent range. Significant differences between the results obtained with the new equation and the old formulation, which treated the transport numbers as solvent-independent, were observed only for the HCl junctions involving 90-100 wt % aqueous methanol, where tH exhibits a sharp minimum as a function of the solvent composition.
TL;DR: The reaction of sodium β-naphthoxide with benzyl halides in molten tetraalkylammonium or phosphonium halides (at 110°C or below) leads to a highly regioselective O-alkylation as discussed by the authors.
Abstract: The reaction of sodium β-naphthoxide with benzyl halides in molten tetraalkylammonium or phosphonium halides (at 110°C or below) leads to a highly regioselective O-alkylation. These new solvents, which can be quantitatively recovered at the end of the reaction, mimic the behaviour of dipolar aprotic solvents.
TL;DR: Proton speciation in ambient-temperature chloroaluminate ionic liquids, composed of 1-ethyl-3-methylimidazolium chloride (ImCl) and aluminum chloride has been examined by 2 H NMR and FT-IR spectroscopies.
Abstract: Proton speciation in ambient-temperature chloroaluminate ionic liquids, composed of 1-ethyl-3-methylimidazolium chloride (ImCl) and aluminum chloride has been examined by 2 H NMR and FT-IR spectroscopies. In oxide free basic melts (excess ImCl), two proton-containing species, HCl and HCl 2 - , exist which are in an equilibrium that strongly favors the formation of the dichloride ion. In oxide free acidic melts (excess AlCl 3 ) HCl is the only proton-containing species.