Temperature dependence measurements and molecular interactions for ammonium ionic liquid with N-methyl-2-pyrrolidone

T. Kavitha, Pankaj Attri, Pannuru Venkatesu, R. S. Rama Devi, T. Hofman

Research output: Contribution to journalArticle

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Abstract

We report the synthesis and characterisation of a series of ammonium ionic liquids (ILs) containing acetate and sulphate anions with alkyl ammonium cation. To understand the thermophysical properties of these synthesised ILs with polar solvent N-methyl-2-pyrrolidone (NMP), precise measurements such as densities (ρ), speed of sound (u), and viscosity (η) over the entire mole fraction range have been measured at 5 K intervals within the temperature range of (298.15 to 313.15) K under atmospheric pressure. The excess molar volume (V E), the deviation in isentropic compressibility (Δκ s), and deviation in viscosity (Δη) were predicted using these temperature dependence properties as a function of the concentration of ILs. The Redlich-Kister polynomial was used to correlate the results. The ILs investigated in the present work included diethylammonium acetate (DEAA) [(CH 3CH 2) 2NH][CH 3COO], triethylammonium acetate (TEAA) [(CH 3CH 2) 3NH][CH 3COO], diethylammonium hydrogen sulphate (DEAS) [(CH 3CH 2) 2NH][HSO 4], and triethylammonium hydrogen sulphate (TEAS) [(CH 3CH 2) 3NH][HSO 4]. The intermolecular interactions and structural effects were analysed on the basis of the measured and the derived properties. The information reported here in terms of ion-dipole interactions, ion-pair interactions and hydrogen bonding between ILs and NMP, elucidates the influences of ions and also the temperature effects on the thermophysical properties.

Original languageEnglish
Pages (from-to)223-237
Number of pages15
JournalJournal of Chemical Thermodynamics
Volume54
DOIs
Publication statusPublished - Nov 1 2012
Externally publishedYes

Fingerprint

Ionic Liquids
Molecular interactions
molecular interactions
Ammonium Compounds
Ionic liquids
Temperature measurement
methylidyne
temperature dependence
Sulfates
liquids
Acetates
acetates
sulfates
Ions
thermophysical properties
interactions
Hydrogen
Thermodynamic properties
Viscosity
hydrogen

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

Temperature dependence measurements and molecular interactions for ammonium ionic liquid with N-methyl-2-pyrrolidone. / Kavitha, T.; Attri, Pankaj; Venkatesu, Pannuru; Rama Devi, R. S.; Hofman, T.

In: Journal of Chemical Thermodynamics, Vol. 54, 01.11.2012, p. 223-237.

Research output: Contribution to journalArticle

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