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Cellulose

, Volume 15, Issue 6, pp 763–767 | Cite as

Commentary on the alleged “irregularities” in APT spectra of imidazolium-based ionic liquids

  • Gerald Ebner
  • Andreas Hofinger
  • Lothar Brecker
  • Thomas Rosenau
Note

Introduction

Within the past several years, ionic liquids (ILs) have attracted much interest in cellulose chemistry as dissolution (Zhu et al. 2006; Swatloski et al. 2002) and derivatization media (Wu et al. 2004; Barthel and Heinze 2006; Heinze et al. 2005), and research to use ILs for high-quality cellulosic fiber production is going on (Sun et al. 2008; Hermanutz et al. 2006). It has been realized that the integrity of the cellulose chain during dissolution and derivatization in ILs is largely dependent on the purity of these solvents and of the absence of IL-derived byproducts.

Recent discussions and reviewing duties of scientists in the field of cellulose chemistry have pointed out a peculiarity of APT NMR spectra (attached proton test) of imidazolium-based ionic liquids, such as the commonly used butylmethylimidazolium (BMIM) and ethylmethylimidazolium (EMIM) ILs. This spectral type is often used instead of conventional 13C spectra as it provides additional spectral...

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Gerald Ebner
    • 1
  • Andreas Hofinger
    • 1
  • Lothar Brecker
    • 2
  • Thomas Rosenau
    • 1
  1. 1.Department of ChemistryUniversity of Natural Resources and Applied Life SciencesViennaAustria
  2. 2.Institute of Organic ChemistryUniversity of ViennaViennaAustria

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