Effect of Water on Deep Eutectic Solvent/β-Cyclodextrin Systems

Greta Colombo Dugoni, Maria E. Di Pietro*, Monica Ferro, Franca Castiglione, Steven Ruellan, Tarek Moufawad, Leila Moura, Margarida F. Costa Gomes, Sophie Fourmentin, Andrea Mele

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The rotational dynamics of the mixture composed of the deep eutectic solvent (DES) reline, and the macrocyclic oligosaccharide β-cyclodextrin (βCD) is investigated at the molecular level by NMR relaxation spectroscopy with and without known amounts of water. The progressive addition of water affects the rotational motion of the DES and βCD in different ways. The findings are consistent with βCD interacting primarily with the added water and reline preserving some degree of residual molecular network. Combining in this way the features of the individual components in the mixture may be highly advantageous for future applications. As a proof-of-concept for the encapsulation capacity of βCD within the DES/βCD/H 2 O mixture, the formation of an inclusion complex with the nonsteroidal anti-inflammatory drug piroxicam is demonstrated through NMR chemical shifts variation and intermolecular host-guest NOEs in the rotating frame.

Original languageEnglish
Pages (from-to)7277-7285
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Issue number7
Early online date01 Mar 2019
Publication statusPublished - 01 Apr 2019
Externally publishedYes


  • Correlation time
  • Cyclodextrin
  • Inclusion complex
  • NMR spectroscopy
  • Relaxation

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment


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