Solvation of ionic liquids based on N-alkyl-N-methylmorpholinium cations in N,N-dimethylformamide and dimethyl sulfoxide – A volumetric and acoustic study

Abstrakt

Apparent molar volumes and molar isentropic compressibilities for N-ethyl-N-methylmorpholinium and N-decyl-N-methylmorpholinium tetrafluoroborates in N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) have been determined from density and speed of sound measurements over the temperature range T = (298.15, 303.15, 308.15, 313.15, 318.15 and 328.15) K at experimental pressure p = 0.1 MPa. This data has been used to calculate partial molar volumes and partial molar isentropic compressibilities at infinite dilution. The partial molar expansion coefficients and their secondary derivative have been estimated as well. The obtained results indicate that dimethyl sulfoxide interacts more effectively with ionic liquids studied than N,N-dimetylformamide and ion–ion interaction are stronger for N,N-dimetylformamide solutions than corresponding in dimethyl sulfoxide. Moreover the temperature dependence of the limiting apparent molar volumes and compressibilities is a result of temperature influence on the electrostriction effect, the ordering of a bulk solvent and number solvent molecules in the nearest presence of the salt.

Cytowania

2
CrossRef
0
Web of Science
1
Scopus

Informacje szczegółowe

Kategoria: Publikacja w czasopiśmie
Typ: artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w: JOURNAL OF CHEMICAL THERMODYNAMICS nr 104, strony 91 - 101,
ISSN: 0021-9614
Język: angielski
Rok wydania: 2017
Opis bibliograficzny: Marcinkowski Ł., Szepiński E., Kloskowski A., Namieśnik J., Warmińska D.: Solvation of ionic liquids based on N-alkyl-N-methylmorpholinium cations in N,N-dimethylformamide and dimethyl sulfoxide – A volumetric and acoustic study// JOURNAL OF CHEMICAL THERMODYNAMICS. -Vol. 104, (2017), s.91-101
DOI: 10.1016/j.jct.2016.09.023
wyświetlono 16 razy
Meta Tagi