A5022807170- Ionic liquids properties and applications
- Conservation Techniques and Studies
- Historical Art and Architecture Studies
- Chemical and Physical Properties in Aqueous Solutions
- Cultural Heritage Materials Analysis
- Extraction and Separation Processes
- Building materials and conservation
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- Crystallization and Solubility Studies
- Thermodynamic properties of mixtures
- Semiconductor materials and interfaces
- Semiconductor materials and devices
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- Phase Equilibria and Thermodynamics
- Thin-Film Transistor Technologies
- 3D Surveying and Cultural Heritage
- Photographic and Visual Arts
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- Spectroscopy and Chemometric Analyses
- Analytical Chemistry and Chromatography
- Copper Interconnects and Reliability
- Electrochemical Analysis and Applications
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- Semiconductor Quantum Structures and Devices
Universidad Complutense de Madrid
1998-2019
The good stability and suitable polarity of the 1-alkyl-3-methyl bis(trifluoromethylsulfonyl)imide ionic liquids have prompted their use as solvents for extraction mixtures aromatic aliphatic hydrocarbons. In this paper, aiming to extend study these liquids, liquid−liquid equilibrium systems toluene + heptane [mmim][Tf2N], [emim][Tf2N], [bmim][Tf2N], or [hmim][Tf2N] at T = 313.2 K were determined. experiments with [mmim][Tf2N] [emim]Tf2N shown results in separation from compared distribution...
The use of the N-butylpyridinium tetrafluoroborate ([bpy][BF4]) + bis(trifluoromethylsulfonyl)imide ([bpy][Tf2N]) binary ionic liquid mixture as an aromatic extraction solvent has recently been proposed. To establish potential this to be applied in separation process, its physical properties must measured. In work, refractive indices, densities, and viscosities have determined over temperature range from (303.15 353.15) K at atmospheric pressure. A comparison between sulfolane gathered work...
Refractive indices and densities of the 2-propanol + water 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) ternary system have been measured at 298.15 K. Physical properties [bmim][BF4] binary mixtures also same temperature, whereas mixture has 323.15 K, because total miscibility for this is achieved above temperature. Molar volume excess calculated from experimental data to analyze behavior mixtures. The refractive index correctly adjusted a third-order polynomial expansion...
Refractive indices, densities, and viscosities of 1-ethyl-3-methylimidazolium 1,1,2,2-tetrafluoroethanesulfonate ([emim][CHF2CF2SO3]), ethylsulfate ([emim][CH3CH2SO4]) ionic liquids (ILs) were measured over the temperature range from (293.15 to 353.15) K at atmospheric pressure. The surface tension two ILs was also determined temperatures between (303.15 333.15) K. reliability results gathered in this work assessed by comparing experimental values [emim][CH3CH2SO4] with data available...
Liquid−liquid equilibrium (LLE) data for the ternary systems {heptane + toluene N-butylpyridinium tetrafluoroborate ([bpy]BF4)} and N-hexylpyridinium ([hpy]BF4)} at 313.2 K atmospheric pressure are reported. The degree of consistency experimental LLE was ascertained by applying Othmer−Tobias correlation. To check feasibility using [bpy]BF4 [hpy]BF4 ionic liquids as solvents in aromatic separation processes, their values distribution ratio factor over whole range compositions were plotted...
The binary mixture of N-butylpyridinium tetrafluoroborate ([bpy][BF4]) and 4-methyl-N-butylpyridinium bis(trifluoromethylsulfonyl)imide ([4bmpy][Tf2N]) ionic liquids (ILs) has recently been proposed as an environmentally friendly solvent in the liquid–liquid extraction toluene from heptane. In addition to extractive properties, a must possess adequate physical properties be used industrial process. this paper, we have measured refractive indices, densities, dynamic viscosities {[bpy][BF4] +...
The liquid–liquid equilibrium (LLE) data for the systems heptane + toluene 1-ethyl-3-methylimidazolium methanesulfonate ([emim][CH3SO3]), trifluoromethanesulfonate ([emim][CF3SO3]), or 1,1,2,2-tetrafluoroethanesulfonate ([emim][CHF2CF2SO3]) at T = 313.2 K and atmospheric pressure were determined. To evaluate suitability of these three ionic liquids extraction aromatics from their mixtures with aliphatic hidrocarbons, distribution ratios separation factor curves LLE plotted compared to those...
The liquid–liquid equilibria (LLE) of three ternary systems formed by toluene, heptane, and 1-alkyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids {[xdmim][Tf2N], where x refers to ethyl (e), propyl (p), or butyl (b)} were determined at T = 313.2 K atmospheric pressure. methyl group in position 2 the imidazolium cation seems improve selectivity extraction process toluene from heptane compared results previously obtained for 1-alkyl-3-methylimidazolium {[xmim][Tf2N],...
Four pyridinium-based ionic liquids {N-ethylpyridinium ([epy]), 2-methyl-N-ethylpyridinium ([2empy]), 3-methyl-N-ethylpyridinium ([3empy]), and 4-methyl-N-ethylpyridinium ([4empy]), all with the anion bis(trifluoromethylsulfonyl)imide ([Tf2N])} were investigated for first time as solvents in liquid−liquid extraction of aromatics. Liquid−liquid equilibrium (LLE) data four ternary systems {heptane + toluene [epy][Tf2N], or [2empy][Tf2N], [3empy][Tf2N], [4empy][Tf2N]} determined at T/K = 313.2...
Abstract a-SIN x :H films with a wide composition range (0·27≤×≤1·38), and some of them low oxygen content, have been deposited at room temperature by the electron cyclotron resonance plasma deposition method. Auger spectro-scopy, infrared absorption, transmittance reflectance in ultraviolet/visible/near-infrared are reported. Three different types film obtained: silicon rich, near stoichiometric contaminated. At =1·00, hydrogen calculated from spectra, is minimum (about 10 at.%), N-H bond...
The feasibility of the binary mixture 1-butyl-4-methylpyridinium bis(trifluoromethylsulfonyl)imide and 1-ethyl-3-methylimidazolium ethylsulfate ({[4bmpy][Tf2N] + [emim][C2H5SO4]}) ionic liquids (ILs)) in liquid–liquid extraction toluene from heptane has been investigated at 313.2 K atmospheric pressure. Toluene distribution ratios selectivity were obtained equilibrium data for pseudoternary system {heptane ([4bmpy][Tf2N] [emim][C2H5SO4])} compared to those sulfolane, conventional organic...
Authenticity in Transition: Changing Practices Contemporary Art Making and ConservationErma Hermens, Frances Robertson (eds) (2016)Archetype PublicationsPáginas: 205ISBN: 9781909492363
SiNx:H films with a wide composition range and, some of them, low oxygen content are deposited at room temperature. The defects observed in the attributed to Si-dangling bonds, structure depending on film composition. For N-rich they form ⋅Si≡(N3), whereas for similar [N]/[Si] ratio but containing oxygen, predominant defect is proposed be ⋅Si≡(Si2O), despite high N and O these films. spin density has been related bonds that hydrogen establishes (either Si–H or N–H), maximum value...
Reseña del libro:Colour Change in Paintings Rhiannon Clarricoates, Helen Dowding, Alexandra Gent (eds) Archetype Publications Ltd.London, 2015 Páginas: 138Idioma: InglésISBN: 9781909492431
We have obtained Al/SiNx:H/InP metal-insulator-semiconductor devices depositing SiNx:H thin films by the electron cyclotron resonance plasma method at 200 °C. The electrical properties of structures were analyzed according to capacitance–voltage and deep level transient spectroscopy measurements. deduce an inverse correlation between insulator composition—the N/Si ratio—and density interface traps: those with maximum ratio (1.49) produce minimum trap density—2×1012 cm−2 eV−1 0.42 eV. above...