Glycerol-based deep eutectic solvents: Physical properties

Mohamed Khalid Alomar, Maan Hayyan*, Mohammed Abdulhakim Alsaadi, Shatirah Mohamed Akib, Adeeb Hayyan, Mohd Ali Hashim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

249 Citations (Scopus)


Deep eutectic solvents (DESs) have been used in many industrial applications. DES is a mixture of a salt and a hydrogen bond donor (HBD). In this study, 70 DESs were synthesized successfully based on glycerol (Gly) as the HBD with different phosphonium and ammonium salts, namely methyl triphenyl phosphonium bromide (MTPB), benzyl triphenyl phosphonium chloride (BTPC), allyl triphenyl phosphonium bromide (ATPB), choline chloride (ChCl), N,N-diethylethanolammonium chloride (DAC), and tetra-n-butylammonium bromide (TBAB). The DESs were prepared using different molar ratios of the HBD to the salts. The freezing point of each DES was determined using Differential Scanning Calorimetry (DSC). The physical properties of these DESs, including density, viscosity, conductivity, and surface tension, were investigated as functions of temperature. In addition, the functional groups were analyzed utilizing Fourier transform infrared (FTIR) spectroscopy. It is worth noting that these systems have a wide variety of physical properties, which implies that these DESs would be suitable for diverse applications.

Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalJournal of Molecular Liquids
Publication statusPublished - Mar 2016


  • Choline chloride
  • Deep eutectic solvent
  • Ionic liquid
  • Methyl triphenyl phosphonium bromide
  • N,N-diethyl ethanol ammonium chloride

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry


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