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- W3022624799 abstract "Mixing of ionic liquids (ILs) with molecular solvent can expand the range of structural properties and the scope of molecular interactions between the molecules of the solvents. Exploiting of these phenomena essentially require a basic fundamental understanding of mixing behavior of ILs with molecular solvents. In this context, a series of protic ILs possessing tetra-alkyl ammonium cation [R₄N]⁺ with commonly used anion hydroxide [OH]⁻ were synthesized and characterized by temperature dependent thermophysical properties. The ILs [R₄N]⁺[OH]⁻ are varying only in the length of alkyl chain (R is methyl, ethyl, propyl, or butyl) of tetra-alkyl ammonium on the cationic part. The ILs used for the present study included tetramethyl ammonium hydroxide [(CH₃)₄N]⁺[OH]⁻ (TMAH), tetraethyl ammonium hydroxide [(C₂H₅)₄N]⁺[OH]⁻ (TEAH), tetrapropyl ammonium hydroxide [(C₃H₇)₄N]⁺[OH]⁻ (TPAH) and tetrabutyl ammonium hydroxide [(C₄H₉)₄N]⁺[OH]⁻ (TBAH). The alkyl chain length effect has been analyzed by precise measurements such as densities (ρ), ultrasonic sound velocity (u), and viscosity (η) of these ILs with polar solvent, N-methyl-2-pyrrolidone (NMP), over the full composition range as a function of temperature. The excess molar volume (Vᴱ), the deviation in isentropic compressibility (Δκₛ) and deviation in viscosity (Δη) were predicted using these properties as a function of the concentration of ILs. Redlich–Kister polynomial was used to correlate the results. A qualitative analysis of the results is discussed in terms of the ion-dipole, ion-pair interactions, and hydrogen bonding between ILs and NMP molecules. Later, the hydrogen bonding features between ILs and NMP were also analyzed using a molecular modeling program with the help of HyperChem 7." @default.
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- W3022624799 date "2012-01-01" @default.
- W3022624799 modified "2023-09-24" @default.
- W3022624799 title "Influence of Alkyl Chain Length and Temperature on Thermophysical Properties of Ammonium-Based Ionic Liquids with Molecular Solvent B" @default.
- W3022624799 hasPublicationYear "2012" @default.
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