Standard entropy, surface excess entropy, surface enthalpy, molar enthalpy of vaporization, and critical temperature of bis(trifluoromethanesulfonyl)imide-based ionic liquids

Tzi Yi Wu, Bor Kuan Chen, Chung Wen Kuo, Lin Hao, Yu Chun Peng, I-Wen Sun

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23 Citations (Scopus)

Abstract

The density and surface tension of several bis(trifluoromethanesulfonyl)imide-based ionic liquids (ILs) 1-methyl-3-pentylimidazolium bis(trifluoromethanesulfonyl)imide ([MPI][TFSI]), 1,2-dimethyl-3-pentylimidazolium bis(trifluoromethanesulfonyl)imide ([DMPI][TFSI]), 1-ethyl-3-pentylimidazolium bis(trifluoromethanesulfonyl)imide ([EPeI][TFSI]), and 1-ethyl-3-propylimidazolium bis(trifluoromethanesulfonyl)imide ([EPrI][TFSI]) were measured at temperatures from 293.15 to 353.15. K and atmospheric pressure. The values of thermal expansion coefficient and surface excess entropy were estimated by extrapolation. In terms of Glasser's semiempirical relation of ILs, the standard molar entropy and the lattice energy of ILs were estimated. Using Kabo's and Sugden's methods, the molar enthalpy values of vaporization of the IL, Δ1gHm°(298 K), and Parachor were estimated. The thermal expansion coefficients of the bis(trifluoromethanesulfonyl)imide-based hydrophobic ILs were estimated by the interstice model and they are in good agreement with experimental values. This indicated that the interstice model is reasonable and may be applied to estimate the coefficient of thermal expansion of ionic liquids.

Original languageEnglish
Pages (from-to)860-867
Number of pages8
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume43
Issue number6
DOIs
Publication statusPublished - 2012 Nov 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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