Time-resolved femtosecond CARS of the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate

Johannes Kiefer* (Corresponding Author), Mahesh Namboodiri, Mehdi M. Kazemi, Arnulf Materny

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The ultrafast vibrational dynamics of the room-temperature ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate, [EMIm][EtSO4] are studied using time-resolved femtosecond coherent anti-Stokes Raman scattering spectroscopy. Raman coherences are excited around 1040 and 1400cm(-1), the vibrational dephasing of the modes in the fingerprint region is monitored as a function of time. The results indicate that beating pairs of Raman modes typically correspond to either the cation or the anion. The assignment of mixed mode pairs is not unambiguous and, moreover, the beating patterns of such possible mixed pairs are very weak. Interestingly, no evidence for interionic vibrational energy transfer is found despite the fact that the interactions in the ion pair are characterized by strong hydrogen bonds. Copyright (c) 2015 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)722-726
Number of pages5
JournalJournal of Raman Spectroscopy
Volume46
Issue number8
Early online date14 Apr 2015
DOIs
Publication statusPublished - Aug 2015
EventJoint Conference of the 13th European Conference on Nonlinear Optical Spectroscopy (ECNOS) / 33rd European CARS Workshop (ECW) - Dole, France
Duration: 11 May 201414 May 2014

Keywords

  • ultrafast dynamics
  • dephasing
  • Raman spectroscopy
  • CARS
  • LASER-INDUCED GRATINGS
  • ETHYL SULFATE
  • BINARY-MIXTURES
  • THERMODYNAMIC PROPERTIES
  • INTERFACIAL-TENSION
  • SURFACE-TENSION
  • IMIDAZOLIUM
  • TEMPERATURE
  • SOLVENTS
  • ANION

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